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ADA4303-2 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADA4303-2
Beschreibung Low Cost Active RF Splitter
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 12 Seiten
ADA4303-2 Datasheet, Funktion
www.DataSheet4U.com
FEATURES
Ideal for CATV applications
Excellent frequency response
1.7 GHz, −3 dB bandwidth
1 dB flatness to 1.2 GHz
Low noise figure: 4.4 dB
Low distortion
Composite second order (CSO): −62 dBc
Composite triple beat (CTB): −72 dBc
1 dB compression point of 8.5 dBm
3 dB of gain per output channel
24 dB isolation between output channels
75 Ω input and outputs
Small package size
12-lead, 3 mm × 3 mm lead frame chip scale package
APPLICATIONS
Set-top boxes
Home gateways
CATV distribution systems
Splitter modules
Digital cable ready (DCR) TVs
GENERAL DESCRIPTION
The ADA4303-2 is a 75 Ω, two-output active splitter for use
in applications where a lossless signal split is required. Typical
applications include multituner digital set-top boxes, cable
splitter modules, multituner/digital cable ready (DCR)
televisions, and home gateways where traditional solutions
require discrete passive splitter modules with separate fixed
gain amplifiers.
The ADA4303-2 is a low cost alternative that simplifies designs
and improves system performance by integrating a signal
splitter element and a gain block into a single IC. The ADA4303-2
is available in a 12-lead chip scale package (LFCSP_VQ) and
operates in the extended industrial temperature range of −40°C
to +85°C.
1:2 Single-Ended, Low Cost
Active RF Splitter
ADA4303-2
FUNCTIONAL BLOCK DIAGRAM
5V 5V
0.1µF
0.1µF
1µH
VCC
IL
0.01µF
VIN
VO1
ADA4303-2
0.01µF
VO2
0.01µF
GND
249
249
Figure 1.
4
TA = –40°C
3
2
1 TA = +25°C
0
TA = +85°C
–1
–2
–3
–4
–5
–6
–7
–8
50
100
1000
FREQUENCY (MHz)
4000
Figure 2. Gain (S21) vs. Frequency
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.






ADA4303-2 Datasheet, Funktion
ADA4303-2
TYPICAL PERFORMANCE CHARACTERISTICS
–50
–53
–56
TA = +85°C
–59
–62
TA = +25°C
–65
TA = –40°C
–68
–71
–74
–77
–80
50
100
FREQUENCY (MHz)
1000
Figure 5. Composite Second-Order (CSO) vs. Frequency
–60
–63
–66
–69
TA = +85°C
–72
–75
–78
–81 TA = +25°C TA = –40°C
–84
–87
–90
50
100
FREQUENCY (MHz)
1000
Figure 6. Composite Triple Beat (CTB) vs. Frequency
–60
–63
–66
–69
TA = +85°C
–72
–75
–78
–81 TA = +25°C TA = –40°C
–84
–87
–90
50
100
FREQUENCY (MHz)
Figure 7. Cross Modulation (CXM) vs. Frequency
1000
10
8
6
TA = +85°C
4
TA = +25°C
TA = –40°C
2
0
50 100
FREQUENCY (MHz)
Figure 8. Noise Figure vs. Frequency
60
55
50
45
40
35
30
25
20
50
100
FREQUENCY (MHz)
Figure 9. Output IP2 vs. Frequency
40
35
30
25
20
15
10
5
0
50 100
FREQUENCY (MHz)
Figure 10. Output IP3 vs. Frequency
1000
1000
1000
Rev. 0 | Page 6 of 12

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ADA4303-2 pdf, datenblatt
ADA4303-2
NOTES
©2006 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06364-0-10/06(0)
Rev. 0 | Page 12 of 12

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