ADA4304-2 Datasheet, PDF (1/12 Pages) Analog Devices – 1:2 Single-Ended, Low Cost, Active RF Splitter

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
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
VIN
0.01µF
VOUT1
ADA4304-2
VOUT2
0.01µF
0.01µF
GND
Figure 1.
4
T_A = –40°C
3
2
1
T_A = +85°C
0
T_A = +25°C
–1
–2
–3
–4
–5
–6
–7
–8
50
100
1000
4000
FREQUENCY (MHz)
Figure 2. Gain (S21, S31) vs. Frequency
Rev. 0
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