Transcript
APS3608 Active Splitter for CATV Set-Top Boxes PRELIMINARY DATA SHEET - Rev 1.0
FEATURES •
Single Input, Triple Output Design - Three Video Tuner Outputs
•
Wideband Operation: To Above 1 GHz
•
5 dB Typical Noise Figure at 5 dB Gain
•
Extended Dynamic Range AGC Control, Independent for each Tuner Path
•
High Linearity, Low Distortion
•
Single +5 V Supply
•
Balanced 75 Ohm Inputs/Outputs
•
RoHS Compliant/Lead Free
APPLICATIONS •
CATV Set-Top Boxes with Multiple Tuners
S29 Package 28 Pin QFN 5 mm x 5 mm x 1 mm
PRODUCT DESCRIPTION This active splitter from ANADIGICS accepts a balanced RF input in the 50 MHz to 1.1 GHz frequency range and provides three balanced RF outputs with minimal degradation in signal quality. The singlepackage surface mount device amplifies the input signals using highly linear, low noise amplification stages, and couples the amplified signal to three separate output paths to drive video tuner inputs.
of each tuner path is maintained across a wide AGC range, ensuring low distortion effects on each output signal. Requiring only a single +5 Volt supply, the active splitter design is implemented using the ANADIGICS GaAs MESFET process. The surface mount packaging makes the device ideal for use in today’s multiple-tuner set-top boxes for Cable TV.
Each of the output paths includes independent Automatic Gain Control (AGC). The overall linearity
AGC VID1
AGC VID2
AGC VID3
VID1OUT+ VID1OUTRFIN+ RFIN-
VID2OUT+ VID2OUTVID3 OUT+ VID3 OUT-
Figure 1: Functional Block Diagram 02/2007
GND
GND
GND
GND
GND
GND
GND
APS3608
28
27
26
25
24
23
22
GND
RFIN+
3
19
VID1OUT-
GND
4
18
GND
RFIN-
5
17
VID2OUT+
GND
6
16
GND
AGC VID1
7
15
VID2OUT-
8
9
10
11
12
13
14
GND
20
VID3 OUT-
2
GND
GND
GND
VID1OUT+
VID3 OUT+
21
AGCVID3
1
AGCVID2
VCC
Figure 2: Pinout (X-ray Top View)
Table 1: Pin Description
2
PIN
NAME
DESCRIPTION
PIN
NAME
DESCRIPTION
1
V CC
Supply Voltage
28
GND
Ground
2
GND
Ground
27
GND
Ground
3
RFIN+
RF Input (+)
26
GND
Ground
4
GND
Ground
25
GND
Ground
5
RFIN-
RF Input (-)
24
GND
Ground
6
GND
Ground
23
GND
Ground
7
AGCVID1
Video 1 AGC Control Input
22
GND
Ground
8
AGCVID2
Video 2 AGC Control Input
21
VID1OUT+
Video 1 Output (+)
9
AGCVID3
Video 3 AGC Control Input
20
GND
Ground
10
GND
Ground
19
VID1OUT-
Video 1 Output (-)
11
VID3OUT+
Data Path Output (+)
18
GND
Ground
12
GND
Ground
17
VID2OUT+
Video 2 Output (+)
13
VID3OUT-
Data Path Output (-)
16
GND
Ground
14
GND
Ground
15
VID2OUT-
Video 2 Output (-)
PRELIMINARY DATA SHEET - Rev 1.0 02/2007
APS3608
ELECTRICAL CHARACTERISTICS Table 2: Absolute Minimum and Maximum Ratings PARAMETER
MIN
MAX
UNIT
Supply Voltage (VCC)
0
+8
V
AGC Input Voltage (VAGC)
0
+5
V
RF Input Power (PIN)
-
+25
dBmV
COMMENTS
differential into 75 Ω
Stresses in excess of the absolute ratings may cause permanent damage. Functional operation is not implied under these conditions. Exposure to absolute ratings for extended periods of time may adversely affect reliability.
Table 3: Operating Ranges
PARAMETER
MIN
TYP
MAX
UNIT
50
-
1100
MHz
-
+5
-
V
AGC Input Voltage (VAGC)
+0.3
-
+3.0
V
RF Input Power (PIN)
-15
-
+15
Case Temperature (TC)
-20
-
+85
Operating Frequency (f) Supply Voltage (VCC)
COMMENTS
max. gain at +3 V
dBmV differential into 75 Ω °C
The device may be operated safely over these conditions; however, parametric performance is guaranteed only over the conditions defined in the electrical specifications.
PRELIMINARY DATA SHEET - Rev 1.0 02/2007
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APS3608 Table 4: DC Electrical Specifications (TC = +25 °C, V CC = +5 V, 75 Ω system) PARAMETER
MIN
TYP
MAX
UNIT
COMMENTS
Current Consumption
-
175
-
mA
from +5 V supply
AGC Input Leakage Current
-
50
-
µA
each AGC input
Table 5: Video Tuner Path AC Electrical Specifications (TC = +25 °C, V CC = +5 V, 75 Ω system) PARAMETER
MIN
TYP
MAX
UNIT
Gain at Maximum AGC
4.5
5.5
-
dB
at 1 GHz
Gain at Minimum AGC
-
-24
-
dB
at 1 GHz
AGC Range
28.0
29.5
-
dB
at 1 GHz
Noise Figure
-
4.8
6
dB
at maximum gain
-
-70
-66
dB c
-
-70
-66
dB c
-
-67
-
dB c
Isolation Between Output and Any Other Output Port
-
30
-
dB
Isolation Between Input and Output
-
30
-
dB
Input Return Loss
-
-8
-
dB
75 Ω differential input
Output Impedance
-
75
-
Ω
differential
CTB
(1)
CSO (1) XMOD
(1)
Notes: (1) 132 channels, +6 dBmV flat output, up to +15 dBmV flat input
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PRELIMINARY DATA SHEET - Rev 1.0 02/2007
COMMENTS
APS3608
PERFORMANCE DATA Figure 3: Gain vs. Frequency (TC = +25 °C, V CC = +5 V)
Figure 4: Input Return Loss vs. Frequency (TC = +25 °C, V CC = +5 V) 0
10 Vagc:
0V
0.8 V
+1.0 V
+1.2 V
+1.4 V
+1.6 V
+1.8 V
+2.0 V
+2.2 V
+3.0V
Vagc:
5
0V
1.4 V
1.8 V
+2.0 V
+2.2 V
+2.4 V
+3.0 V
-5
S11: Input Rteurn Loss (dB)
S21: Gain (dB)
0 -5 -10 -15 -20 -25
-10
-15
-20
-25
-30 0
100
200
300
400
500
600
700
800
900
1000
1100
-30
Frequency (MHz)
0
100
200
300
400
500
600
700
800
900
1000
1100
Frequency (MHz)
Figure 6: Reverse Isolation vs. Frequency (TC = +25 °C, V CC = +5 V)
Figure 5: Output Return Loss vs. Frequency (TC = +25 °C, V CC = +5 V) 0
-10
Vagc:
0V
+0.8 V
+1.0 V
+1.4 V
+2.0 V
+2.2 V
+2.6 V
Vagc:
+3.0 V
+0.8 V
+1.0 V
+1.2 V
+3.0 V
-20
S12: Reverse Isolation (dB)
S22: Output Return Loss (dB)
0V
-15
-5 -10 -15 -20 -25 -30
-25 -30 -35 -40 -45 -50
-35 -55
-40
-60
0
100
200
300
400
500
600
700
800
900
1000
1100
0
300
600
Frequency (MHz)
900
1200
1500
1800
2100
2400
2700
3000
Frequency (MHz)
Figure 7: Noise Figure vs. Frequency (TC = +25 °C, V CC = +5 V, VAGC = +3 V) 10 9
Noise Figure (dB)
8 7 6 5 4 3 2 1 0 0
100
200
300
400
500
600
700
800
900
1000
1100
Frequency (MHz)
PRELIMINARY DATA SHEET - Rev 1.0 02/2007
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APS3608
Figure 9: CTB vs. Input Power (TC = +25 °C, V CC = +5 V, f = 439 MHz, POUT = +6 dBmV, 135 channel flat input)
-45
-45
-50
-50
-55
-55
-60
-60
CTB (dBc)
CSO (dBc)
Figure 8: CSO vs. Input Power (TC = +25 °C, V CC = +5 V, f = 77 MHz, POUT = +6 dBmV, 135 channel flat input)
-65 -70
-65 -70
-75
-75
-80
-80
-85
-85 -90
-90 -20
-15
-10
-5
0
5
10
15
20
-20
25
-15
-10
-5
Figure 10: Output Port-to-Port Isolation vs. Frequency (TC = +25 °C, V CC = +5 V)
5
10
15
20
25
Figure 11: Gain vs. AGC Voltage (TC = +25 °C, V CC = +5 V)
-20
10
-30
5 45 MHz 495 MHz 1005 MHz
0
-40
-5
Gain (dB)
Isolation (dB)
0
Input Power (dBmV)
Input Power (dBmV)
-50
-60
-10 -15
-70 Vagc:
0V
-20
+3.0 V
-80
-25
-90
-30
0
300
600
900
1200
1500
1800
2100
2400
2700
3000
0.0
0.5
Frequency (MHz)
6
1.0
1.5
AGC Voltage (V)
PRELIMINARY DATA SHEET - Rev 1.0 02/2007
2.0
2.5
3.0
APPLICATION INFORMATION
22
GND
23
GND
24
GND
GND
GND
GND
GND
25
4
GND
5
RFIN-
GND VID1OUT- 19
150Ω
GND
7
AGCVID1
GND
8
9
10
11
12
13
82pF
82pF 470nH
150Ω
470nH
VID2OUT- 15
14
0.01uF
82pF
82pF 150Ω
0.01uF
0.01uF
Video 2 Ouput (75 Ohms)
+5 V
AGCVID2 AGCVID3
Video 1 Ouput (75 Ohms)
+5 V
GND VID2OUT+ 17 16
0.01uF
470nH
18
6
AGCVID1
82pF 470nH
GND
RFIN+
VID3OUT-
GND
3
20
GND
2
+5 V
VID1OUT+ 21
VCC
VID3OUT+
see note 0.01uF
26
GND
0.01uF
RF Input (75 Ohms)
1
27
AGCVID3
0.01uF
AGCVID2
Figure 12: Application Circuit
PRELIMINARY DATA SHEET - Rev 1.0 02/2007
28
+5 V
470nH 470nH
0.01uF
Video 3 Output (75 Ohms)
82pF
0.01uF
NOTE: Optional resistor across input pins may be used to tune input return loss.
APS3608
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APS3608
PACKAGE OUTLINE
Figure 13: S29 Package Outline - 28 Pin 5 mm x 5 mm x 1 mm QFN
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PRELIMINARY DATA SHEET - Rev 1.0 02/2007
APS3608
NOTES
PRELIMINARY DATA SHEET - Rev 1.0 02/2007
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APS3608
NOTES
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PRELIMINARY DATA SHEET - Rev 1.0 02/2007
APS3608
NOTES
PRELIMINARY DATA SHEET - Rev 1.0 02/2007
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APS3608
ORDERING INFORMATION ORDER NUMBER
TEMPERATURE RANGE
APS3608RS29P8
-20 oC to +85 oC
PACKAGE DESCRIPTION
COMPONENT PACKAGING
RoHS Compliant 28 Pin 5 mm x 5 mm x 1 mm Tape and Reel, 2500 pieces per Reel QFN Package
ANADIGICS, Inc. 141 Mount Bethel Road Warren, New Jersey 07059, U.S.A. Tel: +1 (908) 668-5000 Fax: +1 (908) 668-5132 URL: http://www.anadigics.com E-mail:
[email protected] IMPORTANT NOTICE ANADIGICS, Inc. reserves the right to make changes to its products or to discontinue any product at any time without notice. The product specifications contained in Advanced Product Information sheets and Preliminary Data Sheets are subject to change prior to a product’s formal introduction. Information in Data Sheets have been carefully checked and are assumed to be reliable; however, ANADIGICS assumes no responsibilities for inaccuracies. ANADIGICS strongly urges customers to verify that the information they are using is current before placing orders.
WARNING ANADIGICS products are not intended for use in life support appliances, devices or systems. Use of an ANADIGICS product in any such application without written consent is prohibited.
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PRELIMINARY DATA SHEET - Rev 1.0 02/2007
