ANADIGICS APS3604

APS3604
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
•
Wide 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
11/2004
GND
GND
GND
GND
GND
GND
GND
APS3604
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
11/2004
APS3604
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 V
°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
11/2004
3
APS3604
Table 4: DC Electrical Specifications
(TC = +25 °C, VCC = +5 V, 75 Ω system)
MIN
TYP
MAX
UNIT
Current Consumption
-
175
-
mA
from +5 V supply
AGC Input Leakage Current
-
50
-
µA
each AGC input
PARAMETER
COMMENTS
Table 5: Video Tuner Path AC Electrical Specifications
(TC = +25 °C, VCC = +5 V, 75 Ω system)
PARAMETER
MIN
TYP
MAX
UNIT
Gain at Maximum AGC
4.5
5
-
dB
Gain at Minimum AGC
-
-23
-
dB
Noise Figure
-
4.8
6
dB
CTB
-
-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 V differential input
Output Impedance
-
75
-
V
differential
(1)
CSO (1)
XMOD
(1)
Notes:
(1) 132 channels, +6 dBmV flat output, up to +15 dBmV flat input
4
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
COMMENTS
at maximum gain
APS3604
PERFORMANCE DATA
Figure 4: Input Return Loss vs. Frequency
(TA = +25 oC, VCC = + 5 V)
Figure 3: Gain vs. Frequency
(TA = +25 oC, VCC = + 5 V)
-5
10
Vagc:
+3.0 V
+2.0 V
+1.8 V
+1.6 V
+1.4 V
+1.2 V
+1.0 V
0V
S11: Input Return Loss (dB)
5
S21: Gain (dB)
0
-5
-10
-15
-10
-15
Vagc = +3.0 V
Vagc = +2.0 V
Vagc = +1.8 V
Vagc = +1.4 V
Vagc = +1.0 V
Vag = 0 V
-20
-20
-25
-25
0
100
200
300
400
500
600
700
800
900
1000
1100
0
100
200
300
400
Frequency (MHz)
500
600
700
800
900
1000
1100
Frequency (MHz)
Figure 6: Reverse Isolation vs. Frequency
(TA = +25 oC, VCC = + 5 V)
Figure 5: Output Return Loss vs. Frequency
(TA = +25 oC, VCC = + 5 V)
0
-20
-25
-5
S12: Reverse Isolation (dB)
S22: Output Return Loss (dB)
-30
-10
-15
-20
Vagc = +3.0 V
Vagc = +2.0 V
Vagc = +1.4 V
Vagc = +1.0 V
Vagc = 0 V
-25
-30
-35
-40
-45
-50
-55
Vagc = +3.0 V
Vagc = +2.0 V
Vagc = +1.4 V
Vagc = +1.0 V
Vagc = 0 V
-60
-65
-35
0
100
200
300
400
500
600
700
800
900
1000
1100
-70
0
100
200
300
Frequency (MHz)
400
500
600
700
800
900
1000
1100
Frequency (MHz)
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
5
APS3604
Figure 7: CSO vs. Input Power
(TA = +25 oC, VCC = + 5 V, POUT = +6 dBmV,
135 channel flat input)
Figure 8: CTB vs. Input Power
(TA = +25 oC, VCC = + 5 V, POUT = +6 dBmV,
135 channel flat input)
-45
-45
-50
-50
77 MHz
445 MHz
865 MHz
-55
-60
-60
CTB (dBc)
CSO (dBc)
77 MHz
445 MHz
865 MHz
-55
-65
-70
-65
-70
-75
-75
-80
-80
-85
-85
-90
-90
5
10
15
20
25
5
10
15
Input Power (dBmV)
25
Figure 10: Gain vs. AGC Voltage
(TA = +25 oC, VCC = + 5 V)
-20
10
-30
5
-40
0
-50
-5
Gain (dB)
Isolation (dB)
Figure 9: Output Port-to-Port Isolation vs. Frequency
(TA = +25 oC, VCC = + 5 V, POUT = +6 dBmV)
-60
-70
52 MHz
502 MHz
997 MHz
-10
-15
Vagc = +3 V
Vagc = 0 V
-80
-20
-90
-25
0
500
1000
1500
2000
2500
3000
0
0.5
Frequency (MHz)
6
20
Input Power (dBmV)
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
1
1.5
AGC Voltage (V)
2
2.5
3
RF Input
(75 Ohms)
AGCVID3
AGCVID2
AGCVID1
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
9
0.01uF
8
AGCVID1
GND
RFIN-
GND
RFIN+
GND
VCC
0.01uF
7
6
5
4
3
2
1
10
11
12
13
22
14
150W
VID2OUT- 15
GND
16
GND
VID2OUT+ 17
18
GND
VID1OUT- 19
20
VID1OUT+ 21
+5 V
470nH
470nH
150W
150W
0.01uF
470nH
470nH
+5 V
470nH
470nH
+5 V
0.01uF
0.01uF
82pF
82pF
82pF
82pF
82pF
82pF
NOTE: Optional resistor across input pins may be used to tune input return loss.
0.01uF
see note
0.01uF
0.01uF
0.01uF
GND
AGCVID2
23
GND
AGCVID3
24
GND
GND
25
GND
VID3OUT+
26
GND
GND
27
GND
VID3OUT-
28
GND
GND
+5 V
Video 3 Output
(75 Ohms)
Video 2 Ouput
(75 Ohms)
Video 1 Ouput
(75 Ohms)
APS3604
APPLICATION INFORMATION
Figure 11: Application Circuit
7
APS3604
PACKAGE OUTLINE
Figure 12: S29 Package Outline - 28 Pin 5 mm x 5 mm x 1 mm QFN
8
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
APS3604
NOTES
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
9
APS3604
NOTES
10
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
APS3604
NOTES
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
11
APS3604
ORDERING INFORMATION
ORDER NUMBER
TEMPERATURE
RANGE
APS3604RS29P8
-20 oC to +85 oC
PACKAGE
DESCRIPTION
COMPONENT PACKAGING
RoHS 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: Mktg@anadigics.com
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.
12
PRELIMINARY DATA SHEET - Rev 1.0
11/2004