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Cxa1797q

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November 2018
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Computers & electronics Audio & home theatre Cassette players

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CXA1797Q Dolby B-C Type Noise Reduction System with Recording Equalizer Amplifier Description The CXA1797Q is an audio signal processing LSI designed for use in cassette decks. Functions include Dolby B-C noise reduction, recording equalizer amplifier, meter circuit (logarithmic), bias control circuit, and playback switching circuit. Serial control of these functions is possible. Features • Few external parts • Serial control of each functions possible • Dolby B-C noise reduction • Dolby S noise reduction select switch • Recording equalizer amplifier • Recording volume control • Playback input select switch • Meter circuit (logarithmic wave detection) • Bias control circuit (left and right independent) Applications Cassette decks 64 pin QFP (Plastic) Absolute Maximum Ratings (Ta=25°C) • Supply voltage VCC +12 V (between VCC and VEE) • Operating temperature Topr –20 to +75 °C • Storage temperature Tstg –65 to +150 °C • Allowable power dissipation PD 1.02 W Recommended Operating Conditions Supply voltage VCC ±5.25 to ±6.0 V Structure Bipolar silicon monolithic IC ∗This IC is available only to the licensees of Dolby Laboratories Licensing Corporation from whom licensing and applications information may be obtained. ∗"Dolby" and the double D symbols are trade marks of Dolby Laboratories Licensing Corporation. Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. —1— E94X42-TE GND [ DECK-A ] PB Only HEAD to Control IC GND for R-ch DVCC R-ch GND R2 PB -EQ VEE GND DVCC VEE GND VEE VCC GND 600 C3 LINE IN 2.2µ C1 -21dBv PB IN2 -21dBv 2.2µ VGS (C) DOLBY IREF PB IN1 20k R5 DVCC DGND REC/PB IREF R6 27k GND(VG) VEE VCC XRESET LATCH CLK DATA BALANCE REC LEVEL VGS(C) -10dBv ×1 R9 R3 50k C2 R4 LINE IN R1 180k 50k R7 22k 2.2µ -10 dBv B DECK PRE DECK A/B A DECK BIAS VGS (C) RVA 6.5k R11 MPX Filter R12 4.7k 10k R15 GND -26dBv PB (-30dBm) REC/PB REC PB (-30dBm) -31dBv Dolby PB IN SSK GND VEE VEE SSW B/C NR BC/S S-NR B/C NR BC/S S-NR Dolby REC OUT (-6dBm) C9 LINE OUT S IN Dolby TC2 LLS VF HLS VF Dolby TC1 ANTS 22.5k 1.5k (-6dBm) MOA OUT Dolby S-NR Dolby B/C-NR R25 12k R21 (-6dBm) 1.5k R19 R20 MOA REC REC/PB 12k 22.5k R26 1.5k 1.5k R23 REC/PB REC R27 PB MOA R24 VGS (C) PB REC/PB REC Dolby R16 REC IN 6.2k R17 40k -26dBv (-25dBm) OFF/ON B/C BC/S REC/PB NOR/CAL A/B OFF/ON 120µ/70µ OFF/ON NORM/HIGH OFF/ON -10dBv VOL OUT 3.3k -21dBv PB OUT -21dBv Dolby-NR Dolby-NR Dolby-NR Dolby-NR METER PB-DECK LINE-MUTE Tape-EQ METAL SPEED REC-MUTE VGS VGS (C) (B) CONTROL 6.5k BUF OUT R8 50k R10 50k Gm1 R13 2k 2.2µ R22 L-ch R14 2.2µ 5.6mH 40k -14dBv 22k C5 L1 C4 50k (C) VGS R18 C6 (C) VGS (C) (C) VGS VGS GND C7 8.2k R28 C10 0.68µ -23dBv VGS (B) -7dBv (-6dBm) GND for R-ch 7.5k 8k 4.7k R42 (0dBm) -1dBv LINE OUT -1dBv R35 LINE VGS (C) Gain 12dB up 7.5k R34 (A) GND (0dBm) -6dBv -1dBv METER BPF -4.7dBv R37 -9.6dBv REC Gm2 10k -6dBv R36 R-ch L-ch GND REC-EQ IN VGS (C) -7dBv (-6dBm) SSW 22k R30 2.2µ R29 2.2µ 3.9k C11 R31 ∗Source Impedance 10kΩ 0.1µ R39 10k C8 10.3k GND 0.068µ R32 8k R46 R47 GND 17k C14 -8dBv GND HP Amp GND 220 R48 Gm3 24k R50 40k R51 GND (A) 100p VEE 100p 76k C17 R53 MTR HAEDPHONES DGND BVG 1.25v METAL CrO 2 GND to METER IC 4.7µ C19 VEE 10k DVCC -6dBv GND GND ∗Load Impedance 47kohm REC VM GND REC/PB [ DECK-B ] REC/PB HEAD Bias OSC PB 10mH R62 C20 220p L2 From LINE OUT BIAS-M BIAS-C BIAS-N BIAS OUT FQ CAL GH CAL REC CAL 50k R55 -4dBv REA REC OUT VCC EQ NORM Bias METER OUT 0dB=2.4v (B) VSG +6dBv Gm5 METAL METAL Gm4 ×1 CALIBRATION GND (A) DGND for R-ch METER AC ×1 8k R49 ×1 200p (C) VGS 20k 20k C16 50k R33 GND VGS (C) GND 2.5k C12 R41 (C) VGS 390p R56 50k 2.8k (C) VGS R40 R43 R61 50k TO LINE IN 10k 100p 4k 10k R44 R45 C13 8.5k 1.0µ C15 R52 R63 R38 4.7µ 100k R54 C18 150 3.3µ R58 R59 R60 R57 50k 600 22k 130k 22k —2— 10k -6dBv PB -EQ OSC CXA1797Q Block Diagram PB OUT2 PB IN B2 PB IN A2 REC/PB IREF GND DOLBY IREF PB IN A1 PB IN B1 PB OUT1 DOLBY PBIN1 VOLUME IN1 PB 44 45 REC-EQ 40 41 SPEED ME TAL 120µ/70µ AMUTE 42 43 12 11 10 9 8 7 REC-EQ 120µ/70µ AMUTE SPEED ME TAL CAL CAL 6 PB REC MOA MOA REC PB 5 PB REC LMUTE PB PB REC LMUTE 4 LINE LINE 46 3 47 2 CXA1797Q 48 1 VOLUME B DECK A GND A DECK B 49 BUFFER OUT1 DOLBY PBIN2 VOLUME 50 BUFFER OUT2 VOLUME OUT1 VOLUME IN2 VOLUME OUT2 51 REC IN2 REC IN1 52 DOLBY TCH2 DOLBY TCH1 53 DOLBY TCL2 DOLBY TCL1 54 LINE OUT2 LINE OUT1 55 DOLBY OUT2 DOLBY OUT1 56 DOLBY S IN2 DOLBY S IN1 57 REC OUT2 VC5 VCS REC OUT1 58 REC EQ IN2 REC EQ IN1 59 METER TC2 METER TC1 60 REC ED OUT2 REC EQ OUT1 61 38 BIAS-SW 39 BIAS2 METRL B/C NA 14 BIAS-SW DOLBY B/C NR B/C NM DOLBY B/C NR 13 BIAS1 METAL 62 BIAS2 CrO2 BIAS1 CrO2 63 37 36 BIAS2 OUT S 15 S B/C 33 19 18 17 16 METER1 METER2 B/C 34 35 BIAS1 OUT RECMUTE TC NR TC S TC B/C TC 64 BIAS2 NORMAL BIAS1 NORMAL METER OUT2 CONT METER OUT1 DVCC BALANCE XRESET VEE LATCH CLK DATA DGND REC LEVEL GH CAL FQ CAL REC CAL VCC 32 31 30 29 28 27 26 25 24 23 22 —3— 21 AA AA AA A 20 Pin Configuration CXA1797Q CXA1797Q Pin Description Pin No. Symbol (Ta = 25°C, dual-power supply configuration, VCC = 5.5 V, VEE = 5.5 V, DVCC = 5.0 V) Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description 0.0V –10dBv O — 6.5k 500 1 BUFFER OUT1 51 BUFFER OUT2 500 VCC Recording volume input buffer output 147 VEE 0.0V –10dBv O Recording volume output — 6.5k 500 2 VOLUME OUT1 50 VOLUME OUT2 500 VCC 147 VEE VCC 3 REC IN1 49 REC IN2 0.0V –26dBv (–25dBm) I 40kΩ 40k VCT Recording input 147 VEE — — — 147 36k VEE +0.4V Time constant for the HLS 330k 4 DOLBY TCH 1 48 DOLBY TCH2 13k VCC VEE —4— CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description 5 DOLBY TCL1 47 DOLBY TCL2 VEE +0.9V — — 13.5k VCC — 480k 147 Time constant for the LLS VEE 0.0V –1dBv (0dBm) O — 8k Line output 147 300 6 LINE OUT1 46 LINE OUT2 300 VCC VEE 200 VCC 0.0V –7dBv (–6dBm) O — Dolby S NR output 12k 147 200 7 DOLBY OUT1 45 DOLBY OUT2 VEE 8 DOLBY S IN1 44 DOLBY S IN2 0.0V –7dBv (–6dBm) O 23.5kΩ 147 1.5k 22k VCC Dolby S NR input VCT VEE —5— CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description 0.0V –7dBv (–6dBm) O — Recording output 147 200 9 REC OUT1 43 REC OUT2 200 VCC VEE VCC Recording 0.0V –23dBv I equalizer amplifier input 50kΩ 147 50k 10 REC EQ IN1 42 REC EQ IN2 VCT VEE 0.0V — — — DC cut capacitance 300 11 METER AC1 41 METER AC2 300 VCC 8.5k VEE 0.0V –4dBV O — 50k VEE —6— 147 200 12 REC EQ OUT1 40 REC EQ OUT2 200 VCC Recording equalizer amplifier output CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description VCC 13 39 14 38 15 37 BIAS MTL1 BIAS MTL2 BIAS CrO1 BIAS CrO2 BIAS NORM1 BIAS NORM2 VEE +1.25V — I — Recording bias control voltage setting 147 VEE VCC 16 BIAS OUT1 36 BIAS OUT2 — — O Recording bias control voltage output — 147 VEE VCC 17 NR TC 18 B/C TC 34 S TC — — I/O 17kΩ 17k 147 VEE Time constant for selecting NR mode Time constant for selecting B/C mode Time constant for selecting S and B/C modes 19 METER OUT1 33 METER OUT2 2.4V — O — 100p 4k DGND VEE —7— 76.6k 150 VCC Meter output (sensitivity: 65 mV/dB) CXA1797Q Pin No. Symbol 20 VEE 32 VCC Typical pin voltage DC AC –5.5V +5.5V — I/O I Z (in) Equivalent circuit Description Negative power supply (Connect to ground when using a single power supply) Positive power supply — VCC 21 XRESET 22 LATCH 23 CLK — — I 2.5V DGND reference — 2k Reset signal input (active low) Load signal input Clock input DGND VEE VCC 24 DATA — — I 2.5V DGND reference — 4k DGND 25 DGND 0V — I Data input VEE Logic and CAL reference — 0V — I 147 100kΩ 40k 26 REC LEVEL 60k VCC DGND VEE —8— Recording volume adjustment Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description 70k CXA1797Q Recording volume balance adjustment VCC 147 2.5V — I 100kΩ 30k 27 REC BALANCE DREF VEE VCC 28 GH CAL 29 FQ CAL 2.5V — I High-frequency gain adjustment of recording equalizer amplifier Peak frequency Q adjustment of recording equalizer amplifier 54kΩ 147 54k VEE VCC 30 REC CAL 2.5V — I Recording equalizer amplifier gain adjustment 54kΩ 147 54k VEE +5.0V — I — DREF 30k 31 DVCC 30k VCC DGND VEE DVCC —9— Logic power supply (DREF = 1/2 (DVCC + DGND) is CAL reference.) CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description VCC 35 RECMUTE TC — — I/O Time constant for selecting RECMUTE mode 17kΩ 17k 147 VEE VCC 0.0V –10dBv I Recording volume input 50kΩ 147 50k 52 LINE IN2 64 LINE IN1 VCT VEE VCC 53 DOLBY PBIN2 63 DOLBY PBIN1 0.0V –31dBv (–30dBm) I 40k VCT 40kΩ Playback input 147 VEE 0.0V –21dBv O — 300 54 PBOUT2 62 PBOUT1 300 VCC VEE —10— 147 Head select output of playback equalizer amplifier CXA1797Q Pin No. Symbol Typical pin voltage DC AC I/O Z (in) Equivalent circuit Description VCC PB IN B2 PB IN A2 PB IN A1 PB IN B1 0.0V –21dBv I 50kΩ 147 Head select input of playback equalizer amplifier 50k 55 56 60 61 VCT VEE 57 REC IREF VEE+ 1.25V 192 VCC — — Reference current of recording equalizer amplifier — 147 VEE 30k VCC 0V — — — 30k 58 GND Ground (center capacitance when using a single power supply) VEE VCC 59 DOLBY IREF VEE+ 1.25V — — — VEE+1.25V 147 VEE —11— Reference current CXA1797Q Electrical Characteristics Table (Ta = 25°C, dual-power supply configuration, VCC = 5.5 V, VEE = 5.5 V, DVCC = 5.0 V) Block Item Conditions Specifications Unit Min. Typ. Max. Entire LSI ±5.25 ±5.5 ±6.0 V 10.5 11.0 12.0 V 25.0 40.0 55.0 mA Recording Recording equalizer amplifier Recording equalizer amplifier reference output level (315 Hz) — –4.0 — equalizer amplifier Recording reference output level (This output level is the tape reference 0 dB which NORM-NORM mode generate magnetic flux of 250 nWb/m) All of the recording equalizer amplifier blocks use this level as their reference level. Recording Recording equalizer amplifier Input level when the reference output level is 315 Hz, –24.5 –23.0 –21.5 equalizer amplifier Recording reference input level -4 dBv NORM-NORM mode (For measurement, input a 315 Hz, -23 dBv signal to the REC EQ IN pins and then measure the output level.) Recording NORM-NORM mode NORM-tape, NORM-speed mode –1.7 –0.7 –0.3 equalizer amplifier REC-EQ frequency response 1 Input a 3 kHz signal (-20 dB level down) to the REC EQ (3 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording NORM-NORM mode NORM-tape, NORM-speed mode 2.9 4.9 6.9 equalizer amplifier REC-EQ frequency response 2 Input an 8 kHz signal (-20 dB level down) to the REC EQ (8 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording NORM-NORM mode NORM-tape, NORM-speed mode 7.8 10.8 13.8 equalizer amplifier REC-EQ frequency response 3 Input a 12 kHz signal (-20 dB level down) from the (12 kHz, -20 dB) reference to the REC EQ IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-NORM mode CrO2-tape, NORM-speed mode 2.1 3.1 4.1 equalizer amplifier REC-EQ frequency response 1 Input a 3 kHz signal (-20 dB level down) to the REC EQ (3 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-NORM mode CrO2-tape, NORM-speed mode 4.5 6.5 8.5 equalizer amplifier REC-EQ frequency response 2 Input an 8 kHz signal (-20 dB level down) to the REC EQ (8 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-NORM mode CrO2-tape, NORM-speed mode 8.0 11.0 14.0 equalizer amplifier REC-EQ frequency response 3 Input a 12 kHz signal (-20 dB level down) to the REC EQ (12 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-NORM mode METAL-tape, NORM-speed mode 3.7 4.7 5.7 equalizer amplifier REC-EQ frequency response 1 Input a 3 kHz signal (-20 dB level down) to the REC EQ (3 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-NORM mode METAL-tape, NORM-speed mode 5.7 7.7 9.7 equalizer amplifier REC-EQ frequency response 2 Input an 8 kHz signal (-20 dB level down) to the REC EQ (8 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-NORM mode METAL-tape, NORM-speed mode 8.4 11.4 14.4 equalizer amplifier REC-EQ frequency response 3 Input a 12 kHz signal (-20 dB level down) to the REC EQ (12 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. dBv Entire LSI Entire LSI Operating voltage range 1 (positive/negative dual power supplies) Operating voltage range 2 (single power supply) Current consumption (ICC) No signal, no load, VCC = ± 5.5 V —12— dBv dB dB dB dB dB dB dB dB dB CXA1797Q Block Item Conditions Specifications Unit Min. Typ. Max. Recording NORM-HIGH mode equalizer amplifier REC-EQ frequency response 1 (5 kHz, -20 dB) NORM-tape, HIGH-speed mode Input a 5 kHz signal (-20 dB level down)to the REC EQ IN pin and then measure the relative deviation from NORMNS, 315 Hz mode. Recording NORM-HIGH mode NORM-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 2 Input a 15 kHz signal (-20 dB level down) to the REC EQ (15 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording NORM-HIGH mode NORM-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 3 Input a 20 kHz signal (-20 dB level down) to the REC EQ (20 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-HIGH mode CrO2-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 1 Input a 5 kHz signal (-20 dB level down) to the REC EQ (5 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-HIGH mode CrO2-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 2 Input a 15 kHz signal (-20 dB level down) to the REC EQ (15 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording CrO2-HIGH mode CrO2-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 3 Input a 20 kHz signal (-20 dB level down) to the REC EQ (20 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-HIGH mode METAL-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 1 Input a 5 kHz signal (-20 dB level down) to the REC EQ (5 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-HIGH mode METAL-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 2 Input a 15 kHz signal (-20 dB level down) to the REC EQ (15 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording METAL-HIGH mode METAL-tape, HIGH-speed mode equalizer amplifier REC-EQ frequency response 3 Input a 20 kHz signal (-20 dB level down) to the REC EQ (20 kHz, -20 dB) IN pin and then measure the relative deviation from NORM-NS, 315 Hz mode. Recording NORM-NORM mode NORM-tape, NORM-speed mode equalizer amplifier Channel crosstalk Alternately input a 1 kHz signal (+12 dB level up) and (1 kHz, +12 dB, 1 kHz BPF) measure the channel crosstalk. (Use a 1 kHz BPF.) Recording NORM-NORM mode NORM-tape, NORM-speed mode, RL = 2.7 kΩ equalizer amplifier REC-EQ signal handling Input a 1 kHz signal and set the output level so that THD (1 kHz, THD = 1%, RL = 2.7 kΩ) (total harmonic distortion) is 1%. (Measure the distortion of a +9 dB level-up signal.) Recording NORM-NORM mode NORM-tape, NORM-speed mode, RL = 2.7 kΩ equalizer amplifier REC-EQ total harmonic distortion Input a 1 kHz, 0 dB (reference input level) signal and (1 kHz, 0.0 dB, RL = 2.7 kΩ) measure the distortion. (Measure the distortion as THD + N.) Recording NORM-NORM mode NORM-tape, NORM-speed mode, Rg = 5.1 kΩ equalizer amplifier REC-EQ S/N ratio 1 With no signal, measure the noise using the "A"-WGT ("A"-WGT filter) filter. (The measured value is indicated as the relative value compared to the reference level.) Recording NORM-NORM mode NORM-tape, NORM-speed mode equalizer amplifier Output DC offset voltage With no signal, measure the DC offset voltage of the REC (REC OUT pin) OUT pin. —13— –6.2 –5.2 –4.2 dB –0.5 1.5 3.5 dB 3.0 6.0 9.0 dB –1.7 –0.7 0.3 dB 1.4 3.4 5.4 dB 4.1 7.1 10.1 dB 1.0 2.0 3.0 dB 2.1 4.1 6.1 dB 4.3 7.3 10.3 dB — –90.0 –80.0 dB 9.0 11.0 — dB — 0.02 0.6 % 57.0 67.0 — dB –0.5 0.5 V 0.0 CXA1797Q Block Item Conditions Specifications Unit Min. Typ. Max. Recording NORM-NORM mode equalizer amplifier REC-EQ mute characteristics Recording NORM-NORM mode equalizer amplifier REC-EQ REC-CAL characteristics 1 (REC-CAL = 5.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ REC-CAL characteristics 2 (REC-CAL = 0.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ GH-CAL characteristics 1 (GH-CAL = 5.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ GH-CAL characteristics 2 (GH-CAL = 0.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ fQ-CAL characteristics 1-1 (fQ-CAL = 5.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ fQ-CAL characteristics 1-2 (fQ-CAL = 5.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ fQ-CAL characteristics 2-1 (fQ-CAL = 0.0 V) Recording NORM-NORM mode equalizer amplifier REC-EQ fQ-CAL characteristics 2-2 (fQ-CAL = 0.0 V) Recording volume Recording volume amplifier Recording volume characteristics 1 (REC-VOL = 5.0 V, REC-BAL = 2.5 V) Recording volume Recording volume amplifier Recording volume characteristics 2 (REC-VOL = 2.0 V, REC-BAL = 2.5 V) Recording volume Recording volume amplifier Recording volume attenuation (REC-VOL = 0.0 V, REC-BAL = 2.5 V) Recording volume Recording volume amplifier REC-VOL signal handling (1 kHz, THD = 1%, RL = 2.7 kΩ) Recording volume Recording volume amplifier REC-VOL total harmonic distortion (1 kHz, -10.0 dBv, RL = 2.7 kΩ) NORM-tape, NORM-speed mode, REC-MUTE ON Input a 1 kHz signal (+12 dB level up) and measure the attenuation when REC MUTE is on. (Use a 1 kHz BPF.) NORM-tape, NORM-speed mode, REC-CAL = 5.0 V Input a 1 kHz signal (-20 dB level down) and measure the amount of change compared to when the REC-CAL function is at the standard setting. NORM-tape, NORM-speed mode, REC-CAL = 0.0 V Input a 1 kHz signal (-20 dB level down) and measure the amount of change compared to when the REC-CAL function is at the standard setting. NORM-tape, NORM-speed mode, GH-CAL = 5.0 V Input an 8 kHz signal (-20 dB level down) and measure the amount of change compared to when the GH-CAL function is at the standard setting. NORM-tape, NORM-speed mode, GH-CAL = 0.0 V Input an 8 kHz signal (-20 dB level down) and measure the amount of change compared to when the GH-CAL function is at the standard setting. NORM-tape, NORM-speed mode, fQ-CAL = 5.0 V Input an 8 kHz signal (-20 dB level down) and measure the amount of change compared to when the fQ-CAL function is at the standard setting. NORM-tape, NORM-speed mode, fQ-CAL = 5.0 V Input a 12 kHz signal (-20 dB level down) and measure the amount of change compared to when the fQ-CAL function is at the standard setting. NORM-tape, NORM-speed mode, fQ-CAL = 0.0 V Input an 8 kHz signal (-20 dB level down) and measure the amount of change compared to when the fQ-CAL function is at the standard setting. NORM-tape, NORM-speed mode, fQ-CAL = 0.0 V Input a 12 kHz signal (-20 dB level down) and measure the amount of change compared to when the fQ-CAL function is at the standard setting. REC-VOL = 5.0 V, REC-BAL = 2.5 V Input a 1 kHz, -10 dBv signal to the LINE IN pin and measure the full gain of the recording volume amplifier. — 4.6 –88.0 –80.0 dB 6.1 7.6 dB –8.0 –6.5 –5.0 dB 0.7 2.2 3.7 dB –2.8 –1.3 0.2 dB –5.9 –4.4 –2.9 dB –8.4 –6.9 –5.4 dB 5.0 6.5 8.0 dB 4.9 6.4 7.9 dB 7.9 9.4 10.9 dB REC-VOL = 2.0 V, REC-BAL = 2.5 V –10.2 –8.7 –7.2 dB Input a 1 kHz, -10 dBv signal to the LINE IN pin and measure the attenuation of the recording volume amplifier. REC-VOL = 0.0 V, REC-BAL = 2.5 V — –86.0 –80.0 dB Input a 1 kHz, +2 dBv signal and measure the maximum volume attenuation of the recording volume amplifier. (Use a 1 kHz BPF.) REC-VOL = 2.0 V, REC-BAL = 2.5 V, RL = 2.7 kΩ 12.0 12.5 — dB Input a 1 kHz signal and set the input level so that the THD is 1%. (Measure the distortion when the output is +2 dBv.) REC-VOL = 2.0 V, REC-BAL = 2.5 V, RL = 2.7 kΩ — 0.15 0.5 % Input a 1 kHz, -10 dBv signal (reference input level) and measure the distortion. (Measure the distortion as THD + N.) —14— CXA1797Q Block Item Conditions Specifications Unit Min. Typ. Max. Recording volume Recording volume amplifier REC-VOL S/N ratio 1 ("A"-WGT filter) Recording volume Recording volume amplifier Output DC offset voltage (VOL OUT pin) Recording volume Recording volume amplifier REC-VOL balance characteristics 1 (REC-VOL = 5.0 V, REC-BAL = 0.0 V) Recording volume Recording volume amplifier REC-VOL balance characteristics 2 (REC-VOL = 5.0 V, REC-BAL = 5.0 V) Recording volume Recording volume amplifier Channel crosstalk (REC-VOL = 5.0 V, REC BAL = 2.5 V) Recording volume Input buffer gain (1 kHz, -10.0 dBv) Line amplifier Line amplifier gain (1 kHz, -30 dBm) Line amplifier Line amplifier Signal handling (1 kHz, THD = 1%) Line amplifier Line amplifier total harmonic distortion (1 kHz, -30 dBm) Line amplifier Line amplifier S/N ratio ("A"-WGT filter) Line amplifier Line amplifier Line amplifier Line amplifier Line amplifier Output DC offset voltage (LINE OUT pin) Line amplifier MUTE mode characteristics (1 kHz BPF) Line amplifier Line amplifier Channel crosstalk (1 kHz, -14.0 dBv, 1 kHz BPF) Level meter Level meter amplifier Level meter characteristics 1 (REC IN = 1 kHz, -26 dBv) REC-VOL = 5.0 V, REC-BAL = 2.5 V 80.0 83.0 — dB With no signal, measure the noise using an "A"-WGT filter. (The measured value is indicated as the relative value compared to the full-gain level.) REC-VOL = 5.0 V, REC-BAL = 2.5 V –0.15 0.0 0.15 V With no signal, measure the DC offset voltage of the VOL OUT pin. REC-VOL = 5.0 V, REC-BAL = 0.0 V (1 kHz BPF) — –96.0 –60.0 dB Input a 1 kHz, +2 dBv signal and measure the attenuation of VOL OUT 1. (Input -10 dBv and confirm that there is no attenuation at VOL OUT 2.) REC-VOL = 5.0 V, REC-BAL = 5.0 V (1 kHz BPF) Input -10 dBv and confirm that there is no attenuation at VOL OUT 1. (Input a 1 kHz, +2 dBv signal and measure the attenuation of VOL OUT 2.) REC-VOL = 5.0 V, REC-BAL = 2.5 V Alternately input a 1 kHz, +2 dBv signal, and measure the channel crosstalk. (Use a 1 kHz BPF.) –1.0 — 0.0 1.0 dB –98.0 –80.0 dB Input a 1 kHz, -10 dBv signal to the LINE IN pin and measure the gain at the BUF OUT pin. –1.0 0.0 1.0 dB PB mode Input a 1 kHz, -30 dBm signal to the DOLBY PBIN pin and measure the output level at the LINE OUT pins. PB mode Input a 1 kHz signal and set the output level so that the THD is 1%. PB mode Input a 1 kHz, -30 dBm signal (reference input level) and measure the distortion. (Measure the distortion as THD + N.) –1.0 0.0 1.0 dBm 12.0 12.6 — dB 0.5 % — 0.02 PB mode 80.0 82.5 — dB With no signal, measure the noise using an "A"-WGT filter. (The measured value is indicated as the relative value compared to the reference level.) REC mode –0.2 –0.1 0.2 V With no signal, measure the DC offset voltage of the LINE OUT pin. PB, MUTE mode — –107.0 –80.0 dB Input a 1 kHz, -18 dBm signal to the DOLBY PB IN pin and measure the attenuation when LINE MUTE is on. (Use a 1 kHz BPF.) PB mode — –94.0 –80.0 dB Alternately input a 1 kHz, -18 dBm signal to the DOLBY PB IN pin and measure the channel crosstalk. (Use a 1 kHz BPF.) METER ON, REC mode 2.5 2.8 3.1 V Input a 1 kHz, -26 dBv signal to the REC IN pin and measure the output DC voltage at the METER pin. —15— CXA1797Q Block Item Conditions Specifications Unit Min. Typ. Max. Level meter Level meter amplifier Level meter characteristics 2 (REC IN = 1 kHz, -22 dBv) Level meter Level meter amplifier Level meter characteristics 3 (REC IN = 1 kHz, -36 dBv) Level meter Level meter amplifier Level meter characteristics 4 (REC IN = 1 kHz, -46 dBv) Level meter Level meter amplifier Level meter characteristics 5 (REC IN = no signal) Level meter amplifier Level meter CAL characteristics (REC IN = 1 kHz, -58 dBv) Level meter Playback input switch Playback input switch gain (PB IN = 1 kHz, -21 dBv) Playback input switch Playback input switch Signal handling (1 kHz, THD = 1%) Playback input switch Total harmonic distortion (1 kHz, -21 dBv) Playback input switch Playback input switch Playback input switch S/N ratio ("A"-WGT filter) Playback input switch Playback input switch A/B DECK crosstalk A-DECK mode Playback input switch Playback input switch Output DC offset voltage (PB OUT pin) Bias maximum output voltage BIAS SW BIAS SW NORMAL mode Bias output voltage 1 BIAS SW CrO2 mode Bias output voltage 2 BIAS SW METAL mode Bias output voltage 3 METER ON, REC mode 2.75 Input a 1 kHz, -22 dBv (+4 dB level up) signal to the REC IN pin and measure the output DC voltage at the METER pin. METER ON, REC mode 1.85 Input a 1 kHz, -36 dBv (-10 dB level down) signal to the REC IN pin and measure the output DC voltage at the METER pin. METER ON, REC mode 1.2 Input a 1 kHz, -46 dBv (-20 dB level down) signal to the REC IN pin and measure the output DC voltage at the METER pin. METER ON, REC mode — With no signal, measure the DC offset voltage at the METER pin. CAL ON, REC mode 1.2 Input a 1 kHz, -58 dBv (-32 dB level down) signal to the REC IN pin and measure the output DC voltage at the METER pin. Input a 1 kHz, -21 dBv signal to the PB IN pin and –22.0 measure the level. A-DECK mode Input a 1 kHz signal to the PB IN1 pin and set the output level so that the THD is 1%. A-DECK mode Input a 1 kHz, -10 dBv signal (input reference level) to the PB IN1 pin and measure the distortion. (Measure the distortion as THD + N.) A-DECK mode With no signal, measure the noise using the "A"-WGT filter. (The measured value is indicated as the relative value compared to the reference level.) A-DECK mode Input a 1 kHz, -9 dBv (+12 dB level up) signal to the BDECK side and measure the A/B-DECK crosstalk. (Use a 1 kHz BPF.) A-DECK mode With no signal, measure the DC offset voltage of the PB OUT pin. BIAS ON mode, RL = 4.7 kΩ Measure the output DC voltage of the BIAS OUT pin. NORMAL mode Set the external feedback resistance to 56 kΩ, 11 kΩ, 11 kΩ, and 11 kΩ, and measure the output DC voltage of the BIAS OUT pin. CrO2 mode Set the external feedback resistance to 56 kΩ, 11 kΩ, 11 kΩ, and 11 kΩ, and measure the output DC voltage of the BIAS OUT pin. METAL mode Set the external feedback resistance to 56 kΩ, 11 kΩ, 11 kΩ, and 11 kΩ, and measure the output DC voltage of the BIAS OUT pin. —16— 3.05 3.35 V 2.15 2.45 V 1.5 1.8 V 0.01 0.1 V 1.5 1.8 V –21.0 –20.0 dBv 12.0 30.0 — dB 0.02 0.5 % 80.0 84.0 — dB — — –89.0 –80.0 dB –0.2 0.0 0.2 V 4.8 5.0 — V –2.4 –2.2 –2.0 V –0.75 –0.5 –0.25 V 4.2 4.5 4.8 V CXA1797Q Block Item Conditions Specifications Unit Min. Typ. Max. DOLBY Dolby reference level DOLBY REC mode REC IN level DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY Value at the Dolby reference level of the REC OUT pin REC mode, NR off, f = 1 kHz Input a signal to the REC IN pin and measure the level at which the level of the DOLBY OUT pin reaches -6 dBm. PB mode PB mode, NR off, f = 1 kHz PB IN level Input a signal to the NR PB IN pin and measure the level at which the level of the DOLBY OUT pin reaches -6 dBm. B type encoding REC, Dolby B mode Boost characteristics 1 Input a 500 Hz, -25 dB signal to the REC IN pin and measure the boost at the REC OUT pin. B type encoding REC, Dolby B mode Boost characteristics 2 Input a 5 kHz, -25 dB signal to the REC IN pin and measure the boost at the REC OUT pin. B type encoding REC, Dolby B mode Boost characteristics 3 Input a 10 kHz, -40 dB signal to the REC IN pin and measure the boost at the REC OUT pin. B type encoding REC, Dolby B mode Boost characteristics 4 Input a 10 kHz, 0 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 1 Input a 500 Hz, -60 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 2 Input a 500 Hz, -25 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 3 Input a 2 kHz, -60 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 4 Input a 2 kHz, -25 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 5 Input a 5 kHz, -25 dB signal to the REC IN pin and measure the boost at the REC OUT pin. C type encoding REC, Dolby C mode Boost characteristics 6 Input a 10 kHz, 0 dB signal to the REC IN pin and measure the boost at the REC OUT pin. PB mode PB, Dolby off mode Frequency response Input a 20 kHz, -30 dBm signal to the NR PB IN pin and measure the output at the REC OUT pin. REC mode REC, NR off mode Signal handling Input a 1 kHz signal and set the output level so that the THD is 1%. (Measure the distortion using a signal boosted 13.5 dB from the reference.) NR OFF total harmonic distortion REC, NR off mode Input a 1 kHz, +10 dB signal to the REC IN pin and measure the distortion. (Measure the distortion as THD + N.) Dolby B total harmonic distortion REC, Dolby B mode Input a 1 kHz, +10 dB signal to the REC IN pin and measure the distortion. (Measure the distortion as THD + N.) —17— — –6.0 — dBm –26.0 –25.0 –24.0 dBm –31.0 –30.0 –29.0 dBm 1.4 2.9 4.4 dB 3.9 5.4 6.9 dB 9.7 10.4 11.4 dB –1.1 0.4 1.9 dB 14.2 16.2 18.2 dB 7.2 11.2 dB 18.7 20.7 22.7 dB 5.4 7.4 9.4 dB 3.5 5.5 7.5 dB –5.5 –3.5 –1.5 dB 9.2 –7.5 –6.0 –4.5 dBm 13.5 15.8 — dB — 0.02 0.15 % — 0.04 % 0.2 CXA1797Q Block Item Conditions Specifications Unit Min. Typ. Max. DOLBY Logic Dolby C total harmonic distortion REC, Dolby C mode — Input a 1 kHz, +10 dB signal to the REC IN pin and measure the distortion. (Measure the distortion as THD + N.) REC mode REC, Dolby C mode, Rg = 5.1 kΩ 60.0 Dolby C S/N ratio With no signal, measure the noise using the CCIR/ARM filter. (The measured value is indicated as the relative value compared to the DOLBY OUT level.) PB mode PB, NR off mode — Recording → playback crosstalk Input a 1 kHz, +10 dB signal to the REC IN pin and measure the REC → PB crosstalk. (Use a 1 kHz BPF.) REC mode REC, NR off mode — Playback → recording crosstalk Input a 1 kHz, +10 dB signal to the NR PB IN pin and measure the PB → REC crosstalk. (Use a 1 kHz BPF.) REC mode PB, NR off mode — Channel crosstalk Input a 1 kHz, +10 dB signal to the REC IN pin and measure the channel crosstalk. (Use a 1 kHz BPF.) PB mode PB, NR off mode — Channel crosstalk Input a 1 kHz, +10 dB signal to the NR PB IN pin and measure the channel crosstalk. (Ues a 1 kHz BPF.) REC mode REC mode, NR off → B type –100 Output DC offset voltage 1 With no signal, measure the deviation in the output DC (REC OUT pin) offset voltage at the REC OUT pin when switching from NR off mode to B type mode. REC mode REC mode, NR off → C type –100 Output DC offset voltage 2 With no signal, measure the deviation in the output DC (REC OUT pin) offset voltage at the REC OUT pin when switching from NR off mode to C type mode. High level input voltage ViH 3.5 Logic Low level input voltage ViL — — 1.5 V Logic Clock frequency fck — — 500 kHz Logic Clock pulse width tw 1 — — µs Logic Data setup time tsu(DATA→CLK) 1 — — µs Logic Data hold time tH(CLK→DATA) 1 — — µs Logic Latch pulse width tw(DATA) 1 — — µs Logic Latch setup time ts(LATCH→DATA) 1 — — µs Logic Latch hold time tH(CLK→LATCH) 1 — — µs Logic Reset pulse width tw(XRST) 1 — — µs DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY DOLBY —18— 0.08 0.3 % 61.0 — dB –79 –70 dB –90 –70 dB –84 –65 dB –85 –65 dB — 100 mV — 100 mV — — V S506 S505 S504 S503 S502 S501 Oscilloscope Distortion Analyzer GND AC Voltmeter CCIR 1kHz BPF DIN Audio Amp "A" WTG 30dB Amp Filter module 0dB DC Voltmeter •0dB=1Vrms for other tests •0dBm=.7746Vrms for Dolby R100* GND 1.2k R1* 10k 0dBv R2* S1 S2 138.5k 0dBm 10k R4 R3 100 47k 0dBv R5* 47k 0dBv R6* 47k 0dBv R7* S3 S4 47k 0dBv R7* 100 R9 10k R10 138.5k 0dBv R11* R12* 10k 0dBV 0dB •DC MEAS •AC IN •AC MEAS •V EE •G ND 5.1k 5.1k 10k 10k R13* R14* R15* R16* R19* S6 64 63 0.1µ -10dBV C1 -21dBV 61 VOLUME IN1 1 51 DOLBY PBIN1 PB OUT1 PB IN B1 PB IN A1 60 62 DOLBY IREF 59 -21dBV GND 0.1µ -30dBm 0.1µ S7 C2 C4 0.1µ C5 PB IREF 58 PBIN A2 PBIN B2 PB OUT2 DOLBY PBIN2 VOLUME IN2 57 -21dBV 0.1µ -21dBV C3 S8 S9 S16 0.1µ 56 55 54 53 52 0.1µ -21dBV S10 C6 0.1µ -21dBV S11 C7 C9 C10 -10dBV -30dBm 0.1µ C8 S12 S13 0.1µ 2.7k 5.1k R18* 5.1k S5A R17* 2.7k 5.1k 5.1k R20* R22* R21*20k 5.1k 27k R23* R24* 5.1k 5.1k 5.1k R27* 10k R28 10k 5.1k 5.1k R32* R25* R26* S5B R29* R30* R31* •GND S15 BUFFER OUT2 2.7k 0.1µ R36 C12 C14 42 43 44 45 46 47 48 49 REC IN2 50 VOLUME OUT2 2 VOLUMU OUT1 3 C16 -25dBm R40 S25 R34 100 S15 S18 S19B *R44 S23 C18 R38 100 S21 2.7k 0.1µ REC IN1 10k *R48 0.1µ 10k S24 50kΩ DOLBY TCH2 C13 -10dBV 0.1µ S22 C15 -25dBm •VEE BUFFER OUT1 DOLBY TCH2 4 DOLBY TCH1 •AC IN R42 10k *R46 75.6k 0dBm R50 10k 0.1µ C20 C22 5 S27 DOLBY TCL1 6 LINE OUT1 10k 0.01µ R52 0.068µ C24 C26 C25 7 DOLBY OUT1 S36 8 DOLBY S IN1 CXA1797Q 9 DOLBY REC OUT1 10 REC EQ IN1 R54 S28B 10k 0.01µ S30 2.7k 2.7k 0.1µ R60 C28 C32 37 BIAS2 NOMAL 38 BIAS2 CrO2 39 BIAS2 METAL 40 REC EQ OUT2 41 11 33 34 35 36 BIAS2 OUT BOOST2 BOOST1 100 R58 S32 10k *R78 5.1k 32k 0dBv S45B 12 S47 R88 13 11k R91 R89 15 14 56k R79 R94 56k 16 S54 17 S56 18 C42 B/C TC R98 19 VEE XRESET LATCH CLK DATA DGND REC LEVEL GH CAL FQ CAL DVCC BALANCE 10k S60 3.3µ R104 10k 20 22 21 23 24 25 26 27 28 29 31 30 32 V29 VCC V28 0 10k R100 10k S58 R102 4.7µ C44 V27 V26 RQC CAL METER OUT1 0 0 R84 S52B R96 3.3k C40 NR TC 4.7µ 3.3µ 10k V30 0 0 10µ C45 D22 D21 D23 D24 10µ C46 10µ LOAD XRESET CLK DATA GND C47 GND R86 10k R92 11k 11k 11k R90 S51 3.3k C39 R56 10k R62 S35 S388 R70 100 R74 *R76 *R80 C36 0.68µ C38 R82 2.7k 0.1µ -4dBv 100 S49 11k BIAS CrO2 BIAS OUT1 100 0dBm R72 2.7k 0.1µ C34 5.1k -23dBv 0.1µ RECMUTE TC REC EQ OUT1 BIAS METAL BIAS NORMAL S33B S37 S53 R97 •DC MEAS -21dBV LINE OUT2 S26 0.068µ 4.7µ S55 •AC MEAS 10k DOLBY OUT2 0.1µ -6dBm C37 R81 C41 10k 10k R99 Audio SG 100k 1.2k C11 R35 R39 2.7k R43* 10k DOLBY S IN2 -1dBv 0.1µ 0.1µ S43 C33 -23dBv 0.1µ C35 5.1k S TC 0.68µ S45A S46 -4dBv 0.1µ R87 4.7µ S57 Electrical Characteristics Measurement Circuit S14 100 S19A S20 C17 0.1µ R49 C21 DOLBY REC OUT1 C27 -6dBm 0.1µ -6dBm C31 R69 2.7k R75 R77* METER OUT2 S50 R95 C43 10k R101 S59 R103 R101* GND S14 R33 0.1µ 2.7k R37 S17 100 R41 10k R45* 0.1µ R47* 75.9k 0dBm C19 0.01µ 10k R51 R53 2.7k S33A R59 2.7k 10k R61 S34 100 R71 S39 S38A 10k R73* S41 5.1k R79* 100 32.1k 0dBv 2.7k 100 R85 S48 11k 10k S52A 10k -6dBm 0.01µ S28A S29 R55 REC EQ IN2 C23 10k S31 100 R57 —19— 10k R83 10k GND A 5V A DC Ammeter GND VEE VCC Power Supply A DC Ammeter DC Ammeter CXA1797Q 4.7µ 10k C4 R2 220p L2 BIAS OSC B-R A-R A-L B-L OSC BIAS C2 C1 GND LINE IN REC/PB LINE IN GND REC/PB 10mH 220p L1 R1 C3 10mH 10k 4.7µ GND GND 22k GND L3 4.7k PB IN B1 PB IN A1 DOLBY PBIN1 -14dBv 2 50 VEE 3 49 4 48 R21 VEE 7.5k -6dBV 5 47 4.7k R25 6 46 7 45 Dolby S-NR 8 44 GND GND 42 41 CXA1797Q 43 GND 12 40 VEE 13 39 14 38 15 37 16 36 130k 2.2k 600 R37 R35 R33 GND GND GND 35 34 19 33 FQ CAL REC CAL DVCC VCC to METER IC GND 6.2k R16 Fillter MPX VEE -26dBv -6dBV R20 VEE GND GND LINE OUT R-ch 7.5k 4.7k R24 Dolby S-NR 9 10 GND 11 GND GND R34 2.2k R32 600 VEE R36 130k GND GND GND 18 17 50k C37 0.68µ C36 100µ VCC C35 0.68µ 100µ C34 VEE to METER IC VEE XRESET LATCH CLK DATA DGND REC LEVEL BALANCE 1 51 6.2k R17 GND GH CAL IN1 2.2µ VOLUME C12 22k 2.2µ GND GND DOLBY IREF R7 PB OUT1 20k R8 27k MPX Filter GND GND GND GND R44 DGND M icro Processr DVCC 0.68µ C38 100µ C39 DVCC HP Amp HP Amp R45 220 220 R46 HAEDPHONES GND Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. GND PB IN A2 PB IN B2 R9 REQ IREF 4.7k R4 C11 390p 5.6mH 22k 2.2µ R6 PBEQ C6 2.2µ PBEQ C7 2.2µ PBEQ C8 2.2µ PBEQ C8 R11 PB OUT2 2.2µ 22k 2.2µ C13 C9 L4 5.6mH 390p R10 DOLBY PBIN2 R13 C14 R4 VOLUME IN2 180k -14dBv 58 59 60 61 62 64 3.3k R14 63 R15 R23 56 BUFFER OUT1 VOLUME OUT1 GND VOLUME OUT2 REC IN1 ON/OFF DOLBY S IN1 GND BUFFER OUT2 2k 2.2µ DOLBY TCH2 C18 DOLBY TCH1 C17 2.2µ DOLBY TCL1 0.1µ C19 2k C15 R18 GND 0.1µ DOLBY TCL2 C20 100k 4.7µ C21 R22 R3 DOLBY OUT2 DOLBY OUT1 10k REC OUT2 C24 R28 R29 22k REC C23 OUT1 R26 R27 R12 0.068µ C27 LINE OUT2 0.068µ LINE OUT1 4.7µ 100k 1µ VEE 1µ REC EQ OUT2 REC EQ OUT1 VEE BIAS2 CrO 2 BIASI NORMAL BIAS1 CrO2 R5 2.2µ 8.2k REC EQ IN2 C26 8.2k 2.2µ C25 REC EQ IN1 22k BIAS1 METAL R30 BIASI OUT 10k DOLBY S IN2 3.9k 0.68µ 2.2µ METER AC2 C28 2.2µ C27 METER AC1 3.9k 0.68µ NR TC 10k 10k R19 C16 REC IN2 R31 BIAS2 METAL 22k BIAS2 OUT BIAS2 NORMAL 22k 180k 4.7µ C32 S TC ON/OFF 3.3k 52 53 54 3.3µ 57 55 32 31 30 RECMUTE C30 TC B/C TC 4.7µ C31 R42 50k 4.7µ C34 C29 R41 50k METER OUT2 METER OUT1 4.7µ C33 R40 50k 29 28 27 26 25 24 23 22 21 20 GND R38 GND —20— 3.3µ R39 50k R43 DGND LINE OUT L-ch GND Application Circuit CXA1797Q CXA1797Q Description of Operation 1. Logic Usage The CXA1797Q is controlled by 11-bit serial data. Name SPEED METAL EQ A/B METER PB/REC LMUTE RMUTE BC/S B/C NR ON/OFF D1 D2 D3 D4 D5 D6 D7 D8 D9 (Note 1) D10 D11 Function (DATA 1) (Note 2) NORM METAL OFF 120µs DECK A METER GAIN NORM PB MODE LINE MUTE ON REC MUTE ON DOLBY NR B or C DOLBY NR B DOLBY NR OFF Function (DATA 0) HIGH METAL ON 70µs DECK B METER GAIN HIGH (+12dB) REC MODE LINE MUTE OFF REC MUTE OFF DOLBY NR S DOLBY NR C DOLBY NR ON Note 1) S mode takes precedence over other noise reduction modes. (When turning noise reduction off, select BC mode.) Note 2) All data is initialized to "1" when a reset is executed. 2. Serial Data Format An overview of the serial data format is shown below. When using CLK and LATCH as normal high: DATA is read at the rising edge of CLK. CLK DATA D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 LATCH low : hold LATCH high : load Reset operation when low (when reset is required) LATCH XRST When using CLK and LATCH as normal low (Note 3): DATA is read at the rising edge of CLK. CLK DATA D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 LATCH low : hold LATCH high : load Reset operation when low (when reset is required) LATCH XRST Note 3) In this instance, have the LATCH signal rise while CLK is high. —21— CXA1797Q 3. Timing Chart of 11-bit Serial Data Interface tWC 3.5V CLK 1.5V tSDK tHCD tWD 3.5V D1 DATA D2 1.5V tSLD LATCH 1.5V 3.5V CLK tHLC tHCL DATA D10 D11 3.5V LATCH 1.5V XRESET 1.5V tWR —22— tWC CXA1797Q 4. Control pin usage 1) REC VOL Connect a 50 kΩ variable resistor to this pin; this pin controls the electronic volume according to the voltage (between DVCC and DGND) applied to this pin. (Although other resistances and voltages can be used, the gain when the volume is at the center will differ.) 2) REC BAL This pin controls the electronic volume balance. (Both channel sounds are output when voltage of (DVCC + DGND)/2 is applied to this pin or when it is open. When DVCC voltage is applied, only the CH1 sound is output, and when DGND voltage is applied, only the CH2 sound is output.) 3) REC CAL This pin adjusts the overall gain for the recording equalizer amplifier. (The gain is at the center when voltage of (DVCC + DGND)/2 is applied to this pin or when it is open.) 4) FQ CAL This pin adjusts the high-frequency peak Q value for the recording equalizer amplifier. (FP and GP also change.) (The value is at the center when voltage of (DVCC + DGND)/2 is applied to this pin or when it is open.) 5) GH CAL This pin adjusts the middle/high frequency gain for the recording equalizer amplifier. (The gain is at the center when voltage of (DVCC + DGND)/2 is applied to this pin or when it is open.) GP/FP Gain (dB) Low-frequency boost (external) RECCAL GH Frequency (Hz) —23— FQ CXA1797Q 5. NR TC, BC TC, STC, RMUTE TC These time constants are set in order to prevent the generation of a popping noise when one of the switches operates. In addition, these functions can be controlled directly by applying voltage from an external source. (In this case, the capability to drive 17 kΩ impedance is required.) 17kΩ 6. Meter circuit The CXA1797Q meter circuit is a logarithmic detector. The circuit has a sensitivity of 65 mV/dB and is designed to generate 2.8 V when the reference signal is input. This circuit has the temperature characteristics depend on Vt (= KT/q). As a result, in order to satisfy the specifications, sufficient warmup time is required. If METER GAIN is set to HIGH mode, the sensitivity is increased by 12 dB. The METER AC pin is used to detect only the AC component, the low-frequency cut-off is determined by the 8.5 kΩ internal resistance and the capacitance connected to this pin. (With approximately 20 kHz at 1 µF, the high-frequency cut-off is fixed at 20 kHz.) 7. Bias circuit This circuit generates the DC voltage that controls the bias oscillator. The BIASOUT voltage is specified so that voltage equal to the internal reference voltage (VEE + 1.25 V) is generated at a pin selected according to the tape mode (BIAS N, BIAS C, or BIAS M). The BIASOUT pin is provided with a protective resistor of 147 Ω. Take into account the corresponding voltage drop when the load current is high. 147Ω NORM VEE METAL CrO2 VEE —24— CXA1797Q REC EQ frequency response 30 Vcc, VEE = ±5.5V 0dB = NORM Tape—NORM SPEED 315Hz, —24dBV NORM—NORM CrO 2—NORM METAL—NORM NORM—HIGH CrO 2—HIGH METAL—HIGH Output response (dB) 20 10 0 –10 100 10 1k 100k 10k Frequency (Hz) REC EQ total harmonic distortion 10.0 REC EQ load characteristics 14.0 12.0 VCC, VEE = ±5.5V NORM Tape—NORM SPEED 0dB = —4dBV THD+N = 1% 10.0 Output level (dB) Distortion (%) VCC, VEE = ±5.5V NORM Tape—NORM SPEED 0dB = —4dBV, RL = 2.7k 315Hz 1kHz 3kHz 6.3kHz 10kHz 15kHz 1.0 f=315Hz f=1kHz 8.0 6.0 4.0 2.0 0 0.1 100 –12 –8 –4 0 4 8 12 Output level (dB) —25— 500 1k 5k 10k Load resistance (Ω) 50k 100k CXA1797Q REC CAL frequency response 30 VCC, VEE = ±5.5V NORM Tape—NORM SPEED FQ CAL and GH CAL: open 0dB = 315Hz, —24dBV Output response (dB) 20 10 REC CAL = 5.0V REC CAL = 2.5V 0 REC CAL = 0V –10 10 100 1k Frequency (Hz) 10k 100k GH CAL frequency response 30 VCC, VEE = ±5.5V NORM Tape—NORM SPEED REC CAL and FQ CAL: open 0dB = 315Hz, —24dBV Output response (dB) 20 10 GH = 5.0V 0 GH = 2.5V –10 10 100 GH = 0V 1k Frequency (Hz) 10k 100k FQ CAL frequency response 30 Output response (dB) 20 VCC, VEE = ±5.5V NORM Tape—NORM SPEED REC CAL and GH CAL: open 0dB = 315Hz, —24dBV 10 FQ CAL = 5.0V 0 FQ CAL = 0V FQ CAL = 2.5V –10 10 100 1k Frequency (Hz) —26— 10k 100k CXA1797Q Output level vs. REC CAL voltage VCC, VEE = ±5.5V NORM Tape—NORM SPEED GH CAL, FQ CAL = 2.5V 0dB = REC CAL, FQ CAL, GH CAL: open —20dB (at 315Hz, —4dBv) 315Hz 3kHz 8kHz 12kHz 6.0 2.0 0 –2.0 –4.0 –6.0 1.0 0 2.0 4.0 3.0 5.0 REC CAL pin voltage (V) Output level vs. GH CAL voltage VCC, VEE =±5.5V NORM Tape—NORM SPEED REC CAL, FQ CAL = 2.5V 0dB = REC CAL, FQ CAL, GH CAL: open —20dB (at 315Hz, —4dBv) 4.0 Output level (dB) 315Hz 3kHz 8kHz 12kHz 2.0 0 –2.0 –4.0 0 1.0 2.0 3.0 4.0 5.0 GH CAL pin voltage (V) Output level vs. FQ CAL voltage 8.0 VCC, VEE =±5.5V NORM Tape—NORM SPEED REC CAL, GH CAL = 2.5V 0dB = REC CAL, FQ CAL, GH CAL: open —20dB (at 315Hz, —4dBv) 315Hz 3kHz 8kHz 12kHz 6.0 4.0 Output level (dB) Output level (dB) 4.0 2.0 0 –2.0 –4.0 –8.0 0 1.0 2.0 3.0 FQ CAL pin voltage (V) —27— 4.0 5.0 CXA1797Q REC VOL gain vs. Control voltage REC VOL total harmonic distortion 10 VCC, VEE = ±5.5V REC LEVEL: 2.0V 0dB = –10dBV f = 1kHz 0 –10 1.0 Distortion (%) REC VOL gain (dB) –20 –30 –40 –50 0.1 –60 –70 VCC, VEE = ±5.5V NORM Tape— NORM SPEED Input: 1kHz, –10dBv –80 0.01 –8 0 1.0 2.0 3.0 4.0 –4 REC LEVEL control voltage (V) REC balance characteristics 10 0 –10 REC balance gain (dB) –20 –30 –40 1ch 2ch –50 –60 –70 VCC, VEE = ±5.5V NORM Tape—NORM SPEED REC CAL, FQ CAL, GH CAL = 2.5V 0dB = REC LEVEL = 5.0V BALANCE = 2.5V Output for –10dBv input –80 –90 –100 0 1.0 2.0 3.0 4.0 0 4 8 Output level (dB) 5.0 5.0 REC balance control voltage (V) —28— 12 CXA1797Q NR C type encoding characteristics NR B type encoding characteristics 12 10 –40dB VCC, VEE = ±5.5V 0dB = Dolby Level 20 6 4 –20dB 2 Encoding boost (dB) –30dB –10dB 0dB 0 –2 100 500 1k 5k –60dB 16 –50dB 12 –40dB –30dB 8 4 –20dB 0 –10dB –4 10k Frequency (Hz) 0dB 100 500 200 1k 2k 5k 10k Frequency (Hz) NR off total harmonic distortion NR B type total harmonic distortion 2.0 1.0 2.0 VCC, VEE = ±5.5V Encode Mode 0dB = Dolby Level VCC, VEE = ±5.5V Encode Mode 0dB = Dolby Level 1.0 0.5 0.5 0.2 Distortion (%) Distortion (%) Encoding boost (dB) 8 VCC, VEE =± 5.5V 0dB = Dolby Level 0.1 0.05 f = 1kHz 0.1 f=100Hz 0.05 0.02 f = 100Hz –4 f=1kHz f = 10kHz 0.02 0.01 0.2 f=10kHz 0.01 0 4 8 12 Output level (dB) 16 –4 18 —29— 0 4 8 12 Output level (dB) 16 18 CXA1797Q NR ripple rejection ratio 1 NR C type total harmonic distortion 2.0 1.0 VCC, VEE = ±5.5V Encode Mode 0dB = Dolby Level 0 Ripple elimination ratio (dB) 0.5 Distortion (%) f = 100Hz 0.2 0.1 f = 1kHz 0.05 0.02 –10 VCC Rejection on Split Supply VCC, VEE =± 5.5V NR off encoding mode NR off decoding mode NR B encoding mode NR B decoding mode NR C encoding mode $ NR C decoding mode –20 –30 $ –40 $ $ $ $ $ $ $ $ $ $ $ –50 0.01 –60 –4 0 4 8 12 16 Ripple rejection ratio (dB) NR ripple rejection ratio 2 VEE Rejection on Split Supply VCC, VEE = ±5.5V NR off encoding mode 0 NR off decoding mode NR B encoding mode NR B decoding mode NR C encoding mode –10 NR C decoding mode $ –20 $ $ 100 200 $ $ $ $ $ $ $ $ –40 –50 –60 500 1k 2k 5k 200 500 1k 2k Frequency (Hz) Output level (dB) –30 100 10k Frequency (Hz) —30— 5k 10k CXA1797Q Package Outline Unit : mm 64PIN QFP(PLASTIC) 23.9 ± 0.4 + 0.4 20.0 – 0.1 + 0.1 0.15 – 0.05 51 0.15 64 20 1 16.3 32 + 0.4 14.0 – 0.1 52 17.9 ± 0.4 33 + 0.2 0.1 – 0.05 1.0 0.8 ± 0.2 19 + 0.35 2.75 – 0.15 + 0.15 0.4 – 0.1 ± 0.12 M PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN SONY CODE QFP–64P–L01 LEAD TREATMENT EIAJ CODE ∗ QFP064–P–1420 LEAD MATERIAL SOLDER/PALLADIUM PLATING COPPER /42 ALLOY PACKAGE WEIGHT 1.5g JEDEC CODE —31—

Cxa1797q

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