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ADA4304-2 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADA4304-2
Beschreibung 1:2 Single-Ended Low Cost Active RF Splitter
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 12 Seiten
ADA4304-2 Datasheet, Funktion
FEATURES
Ideal for CATV and terrestrial applications
Excellent frequency response
1.6 GHz, −3 dB bandwidth
1 dB flatness to 1.0 GHz
Low noise figure: 4.0 dB
Low distortion
Composite second order (CSO): −62 dBc
Composite triple beat (CTB): −72 dBc
1 dB compression point of 8.25 dBm
2.8 dB of gain per output channel
25 dB output-to-output isolation, 50 MHz to 1000 MHz
75 Ω input and outputs
Integrated output resistors
Small package size: 16-lead, 3 mm × 3 mm LFCSP
APPLICATIONS
Set-top boxes
Residential gateways
CATV distribution systems
www.DataSheet4U.com Splitter modules
Digital cable ready (DCR) TVs
GENERAL DESCRIPTION
The ADA4304-2 is a 75 Ω 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 ADA4304-2 is fabricated using Analog Devices, Inc.
proprietary silicon-germanium (SiGe), complementary bipolar
process, enabling it to achieve very low levels of distortion with
a noise figure of 4 dB. The part provides 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 ADA4304-2 is available in a 16-lead LFCSP and operates in
the extended industrial temperature range of −40°C to +85°C.
1:2 Single-Ended, Low Cost,
Active RF Splitter
ADA4304-2
FUNCTIONAL BLOCK DIAGRAM
5V 5V
0.1µF
0.1µF
1µH
VCC
IL
0.01µF
VIN
VOUT1
ADA4304-2
VOUT2
0.01µF
0.01µF
GND
Figure 1.
4
TA = –40°C
3
2
1 TA = +85°C
0 TA = +25°C
–1
–2
–3
–4
–5
–6
–7
–8
50
100
1000
FREQUENCY (MHz)
4000
Figure 2. Gain (S21, S31) 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
©2007 Analog Devices, Inc. All rights reserved.






ADA4304-2 Datasheet, Funktion
ADA4304-2
TYPICAL PERFORMANCE CHARACTERISTICS
VCC = 5 V, 75 Ω system, TA = 25°C, unless otherwise noted.
–54
–56
–58
–60
–62 TA = +85°C
–64
–66
TA = –40°C
–68
–70 TA = +25°C
–72
–74
50
100
FREQUENCY (MHz)
1000
Figure 5. Composite Second Order (CSO) vs. Frequency
60
63
66
69
72
www.DataSheet4U.com 75
TA = +85°C
78
TA = +25°C
81 TA = –40°C
84
87
90
50
100
FREQUENCY (MHz)
1000
Figure 6. Composite Triple Beat (CTB) vs. Frequency
60
63
66
69
72
TA = +85°C
75
78
81
TA = –40°C
TA = +25°C
84
87
90
50
100
FREQUENCY (MHz)
Figure 7. Cross Modulation (CXM) vs. Frequency
1000
10
50 SYSTEM
8
6 TA = +25°C
TA = +85°C
4
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

6 Page









ADA4304-2 pdf, datenblatt
ADA4304-2
NOTES
www.DataSheet4U.com
©2007 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06539-0-5/07(0)
Rev. 0 | Page 12 of 12

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