Bh1417

Transcript

BH1417F Multimedia ICs Wireless Audio Link IC BH1417F The BH1417F is a FM stereo transmitter IC that transmits simple configuration. The IC consists of a stereo modulator for generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air. The stereo modulator generates a composite signal which consists of the MAIN, SUB, and pilot signal from a 38kHz oscillator. The FM transmitter radiates FM wave on the air by modulating the carrier signal with a composite signal. Frequency is set for North America. !Applications Wireless speakers, Personal computer(sound board), Game machine, CD changer, Car TV, Car navigation !Features 1) It is possible to improve the timbre because it has the pre-emphasis circuit, limiter circuit, and the low-pass filter circuit. 2) Built-in pilot-tone system FM stereo modulator circuit. 3) The transmission frequency is stable because it has a PLL system FM transmitter circuit. 4) PLL controls data input in parallel (4bits, 14ch for North America). !Absolute maximum ratings (Ta = 25°C, In measurement circuit.) Symbol Limits Unit Supply voltage Parameter VCC +7.0 V Pin8,12 Date input voltage VIN-D −0.3~VCC+0.3 V Pin15,16,17,18 VOUT-P −0.3~VCC+0.3 V Pin7 Pd 450 Tstg −55~+125 Phase comparator output voltage Power dissipation Storage temperature ∗ Conditions mW °C ∗ Derating : 4.5mW/°C for operation above Ta=25°C. !Recommended operating conditions (Ta = 25°C) Symbol Min. Typ. Max. Unit Operating supply voltage VCC 4.0 − 6.0 V Operating temperature Topr −40 − +85 °C Audio input level VIN-A − − −10 dBV Pin1,22 Audio input frequency band fIN-A 20 − 15k Hz Pin1,22 Pre-emphasis time constant set up range τ PRE − µs Pin2,21 MHz Pin9,11 − 155 88.9 107.9 VCC V Pin15,16,17,18 − 0.2VCC V Pin15,16,17,18 Parameter Transmission frequency(200kHz step) fTX Control terminal "H" level input voltage VIH − 87.7 106.7 0.8VCC Control terminal "L" level input voltage VIL GND − Conditions Pin8,12 1 2 3 4 5 6 7 8 9 10 11 R−ch INPUT PRE−EMPHASIS TIME CONSTANT LPF TIME CONSTANT FILTER COMPOSITE SIGNAL OUTPUT GND PLL PHASE DETECTOR OUTPUT VCC RF OSCILLATOR RF GND RF OUTPUT PRE-EMPHASIS TIME CONSTANT LPF TIME CONSTANT PILOT SIGNAL ADJUST D3 D2 D1 D0 X'tal OSCILLATOR X'tal OSCILLATOR 22 21 20 19 18 17 16 15 14 13 − + Pre−emphasis and Limiter − MPX VCC 2 1 50 + LPF 1 2 Phase detector + OSC GND VCC PLL VCC L−ch INPUT BH1417F Multimedia ICs !Block diagram PLL VCC 12 LPF 1 4 1 19 Program counter RF RF GND BH1417F Multimedia ICs !Pin descriptions Pin No. 1 R−ch audio source input terminal 8 1 2 VCC 1 2 VCC 43k It cuts DC with the capacitor and it inputs R-ch audio signal. 22 L−ch audio source input terminal 22.7k 1k 1 22 or It cuts DC with the capacitor and it inputs L-ch audio signal. 2,21 Pre-emphasis time constant terminal 6 This is 15kHz LPF. It connects a 150pF capacitor. 100k 50p 8 100k LPF time constant terminal 1 2 VCC 2 21 or It connects a capacitor for the time constant of pre-emphasis. τ=22.7kΩ×C 3,20 DC (V) Equivalent circuit Pin descriptions 100k − 1 + 2 VCC 1 2 VCC 6 3 20 or Filter terminal 8 50k 4 It is a ripple filter for the reference voltage of the audio part. 50k 1 2 VCC 6 4 5 Composite signal output terminal It connects to the FM modulator. 8 1 2 VCC 5 6 6 GND 7 PLL phase detector output terminal It connects to the PLL LPF circuit. − GND 8 − 7 6 8 Power supply terminal − VCC BH1417F Multimedia ICs RF oscillator terminal 8 25k 9 DC (V) Equivalent circuit Pin descriptions This is the base terminal of the colpitts oscillator. It connects time constant of the oscillation. 18p Pin No. 4 7 VCC 2p 9 40k 30p 10 10 RF GND 11 RF transmission output terminal − GND 8 It connects to the antenna through BPF. VCC −1.9 11 10 12 13,14 − PLL power supply terminal X'tal oscillator terminal VCC 12 It connects a 7.6MHz crystal oscillator. 4k 14 13 − 1M 6 15 Parallel data set up terminal D0 16 Parallel data set up terminal D1 12 17 Parallel data set up terminal D2 − 15 16 17 18 or or or 6 18 Parallel data set up terminal D3 19 Pilot signal adjust terminal 8 5k 19 6 1 2 VCC BH1417F Multimedia ICs !Electrical characteristics (Unless otherwise noted, Ta = 25°C, VCC = 5.0V Signal source : fIN = 400Hz) Parameter Quiescent current Symbol Min. Typ. Max. Unit IQ 14 20 28 mA Channel separation Sep 25 40 − dB Total harmonic distortion THD − 0.1 0.3 % Channel balance C.B −2 0 +2 dB Input output gain Gv −2 0 +2 dB Pilot modulation rate MP 12 15 18 % Sub carrier rejection ratio SCR − −30 −20 dB Pre-emphasis time constant τ PRE 40 50 60 µs VIN(LIM) −16 −13 −10 dBV Limiter input level Conditions Measurement circuit Fig.1 VIN=−20dBV L→R,R→L VIN=−20dBV L+R VIN=−20dBV L+R VIN=−20dBV L+R VIN=−20dBV,L+R Pin5 VIN=−20dBV L+R VIN=−20dBV L+R Output level at 1dB gain compression Fig.2 Fig.3 Fig.2 Fig.3 Fig.3 Fig.3 Fig.3 Fig.4 fC(LPF) 12 15 18 kHz VO=−3dB Pin2,21 Open Transmission output level VTX 96 99 102 dBµV fTX=107.9MHz Fig.6 "H" level input current IIH − − 1.0 µA Pin15,16,17,18 VIN=5V Fig.7 LPF cut off frequency Fig.5 IIL −1.0 − − µA Pin15,16,17,18 VIN=0V Fig.7 "H" level output voltage VOH VCC− 1.0 VCC− 0.15 − V Pin7 IOUT=−1.0mA Fig.8 "L" level output voltage VOL − 0.15 1.0 V Pin7 IOUT=1.0mA Fig.8 "off" level leak current1 IOFF1 − − 100 nA Pin7 VOUT=5V Fig.9 "off" level leak current2 IOFF2 −100 − − nA Pin7 VOUT=GND Fig.9 "L" level input current BH1417F Multimedia ICs !Measurement circuits Quiescent current 22 21 20 19 18 17 0.01µ 27p D0 D1 D2 D3 150p 2200p 27p 7.6MHz 16 15 14 13 12 PLL VCC − LPF + Pre-emphasis and Limiter 1 50 MPX LPF − 1 19 1 2 + Program counter Phase detector VCC 2 + OSC VCC GND 1 2 3 4 5 6 7 10µ 150p 0.01µ 2200p 1 4 100µ IQ A +5V Fig.1 8 RF RF GND 9 10 11 BH1417F Multimedia ICs Channel separation Channel balance 22 21 20 19 18 17 D1 D2 D3 L-ch 0.01µ 27p D0 470p 10µ 150p 2200p 27p 7.6MHz 16 15 14 13 12 PLL VCC − LPF + Pre-emphasis and Limiter 1 50 MPX LPF − 1 19 1 2 + fIN = 400Hz VIN = -20dBV Program counter Phase detector + VCC 2 OSC VCC GND 4 5 6 7 10k L-ch 9 100µ Stereo signal demodulator V ~ V ~ Sep, C.B Fig.2 R-ch RF RF GND 8 0.01µ 10µ 3 10µ 2 150p 10µ 1 2200p R-ch 1 4 +5V 10 11 BH1417F Multimedia ICs Total harmonic distortion Input output gain Pilot index of modulation Sub carrier rejection ratio Pre-emphasis time constant 22 L-ch 21 20 19 18 17 D0 D1 D2 D3 0.01µ 27p 27p 470p 10µ + 150p 2200p 7.6MHz 16 15 14 13 12 PLL VCC − LPF + Pre-emphasis and Limiter 1 50 MPX LPF − IN 1 19 1 2 + ~ Vf =400Hz =−20dBV IN Program counter Phase detector + VCC 2 OSC VCC GND 1 2 3 4 5 10µ R-ch 10µ + 6 7 9 0.01µ + 100µ 10k 10µ 150p + SCR IHF BPF 200Hz~15kHz G V , MP τ PRE THD, VO(MUTE) Output response (dB) 0 -10 SCR -20 -30 -40 -50 -60 0 10k 20k 30k 40k 50k Frequency (Hz) Fig.3 RF RF GND 8 + 2200p Spectrum analyzer 1 4 +5V 10 11 BH1417F Multimedia ICs Limiter input level L-ch 22 21 20 19 18 17 D0 D1 D2 D3 0.01µ 27p 27p 470p 10µ + 150p 2200p 7.6MHz 16 15 14 13 12 PLL VCC − LPF + Pre-emphasis and Limiter 1 50 MPX LPF − IN 1 19 1 2 + ~ f =400Hz Program counter Phase detector + VCC 2 OSC VCC GND 2 3 4 5 10µ 1 7 RF GND 8 9 10 11 0.01µ + + 100µ +5V VIN (LIM) Output level (dBV) 10µ + 150p 2200p 10µ + 6 RF 10k R-ch 1 4 1dB Input level (dBV) VIN(LIM) Fig.4 BH1417F Multimedia ICs LPF cut off frequency L-ch 22 21 20 19 18 17 D0 D1 D2 D3 0.01µ 27p 27p 150p 10µ + 470p 7.6MHz 16 15 14 13 12 PLL VCC − LPF + Pre-emphasis and Limiter 1 50 MPX LPF − IN 1 19 1 2 + ~ Vf =400Hz =−20dBV IN Program counter Phase detector + VCC 2 OSC VCC GND 2 3 4 5 10µ 10µ + 6 7 RF GND 8 9 10 11 0.01µ + 10µ 150p + + 100µ +5V fC (LPF) Output response (dB) 1 RF 10k R-ch 1 4 3dB Frequency (Hz) fC(LPF) Fig.5 BH1417F Multimedia ICs Transmission output level 22 21 20 19 18 17 D0 D1 D2 D3 0.01µ 27p 27p 7.6MHz 16 15 14 13 12 PLL VCC − LPF 1 50 MPX LPF Program counter Phase detector VCC 2 + OSC VCC GND 3 4 5 6 7 RF GND 8 9 10 11 0.01µ 1000p 15p + 22p KV-1471E (TOKO) 0.047µ 100 +5V Fig.6 33µ + VTX Spectrum analyzer Zin=50Ω fTX=107.9MHz 10k 5.1k FEM10C-2F6 (SUMIDA) + 100µ 20k 2 10µ 1 RF 10k 2SD2142K (ROHM) − 1 19 1 2 + 1 4 1000p Pre-emphasis and Limiter 27p + BH1417F Multimedia ICs “H” level input current “L” level input current A 0V, 5V IIH, IIL 22 21 20 19 18 17 D0 D1 D2 D3 0.01µ 27p 27p 7.6MHz 16 15 14 13 12 PLL VCC − LPF + Pre-emphasis and Limiter 1 50 MPX LPF − 1 19 1 2 + Program counter Phase detector VCC 2 + OSC VCC GND 1 2 3 4 1 4 5 6 7 RF GND 8 9 0.01µ + 100µ +5V Fig.7 RF 10 11 BH1417F Multimedia ICs “H” level output voltage “L” level output voltage 22 21 20 19 18 17 D0 D1 D2 D3 0.01µ 27p 27p 7.6MHz 16 15 14 13 12 PLL VCC − LPF + Pre-emphasis and Limiter 1 50 MPX LPF − 1 19 1 2 + 1 4 Program counter Phase detector + OSC VCC GND 1 2 3 4 5 6 7 RF GND 8 0.01µ RF 9 10 11 1000p VCC 2 + 50 100µ VOH, VOL ~ V VOH 1mA VOL 1mA +5V Fig.8 SG fIN=108.0MHz (VOH) fIN=107.8MHz (VOL) BH1417F Multimedia ICs “off ” level leak input current 22 21 20 19 18 17 D0 D1 D2 D3 0.01µ 27p 27p 7.6MHz 16 15 14 13 12 PLL VCC − LPF + Pre-emphasis and Limiter 1 50 MPX LPF − 1 19 1 2 + Program counter Phase detector VCC 2 + OSC VCC GND 1 2 3 4 1 4 5 6 7 RF GND 8 9 0.01µ + 100µ IOFF1, IOFF2 A 0V, 5V +5V Fig.9 RF 10 11 BH1417F Multimedia ICs !Application circuit US BAND (88.0MHz∼89.2MHz) 10µ + 1µ 22 50k + ∗27p ∗27p 7.6MHz 150p 2200p 0.1µ 21 20 19 18 17 16 15 14 13 12 PLL VCC L-CH + 1µ GND GND 5 8 0.01µ 9 10 1000p 11 360 82 FEM10C-2F6 (SUMIDA) 20k 33p 33 1µ 7 33p MPX 330p 82p 10µ + KV-1471E (TOKO) 10k 0.047µ 3.3k 10k 10µ + 6 + 1000p 4 3.3k VT 100 100µ + 2200p 3 150p 2200p 1µ 2SD2142K (ROHM) 2 1 + 10k 1 R-CH RF GND 82 VCC + 2.2k 50k 1µ + 100µ GND Fig.10 VCC GFWB3 (SOSHIN) ANT GND BH1417F Multimedia ICs !Circuit operation Parallel data Control data D0 (Pin15) D1 (Pin16) D2 (Pin17) D3 (Pin18) L L L L 87.7MHz H L L L 87.9MHz L H L L 88.1MHz H H L L 88.3MHz L L H L 88.5MHz H L H L 88.7MHz L H H L 88.9MHz H H H L PLL stops. Phase comparator terminal supports high impedance. L L L H 106.7MHz H L L H 106.9MHz L H L H 107.1MHz H H L H 107.3MHz L L H H 107.5MHz H L H H 107.7MHz L H H H 107.9MHz H H H H PLL stops. Phase comparator terminal supports high impedance. !External dimensions (Units : mm) 13.6±0.2 22 12 1 11 0.3Min. 7.8±0.3 5.4±0.2 1.8±0.1 0.11 Frequency 1.27 0.4±0.1 SOP22 0.15±0.1 0.1 This datasheet has been download from: www.datasheetcatalog.com Datasheets for electronics components.