ADA4304-4_15 Datasheet, PDF (1/12 Pages) Analog Devices – Single-Ended, Low Cost, Active RF Splitters

1:3 and 1:4 Single-Ended, Low Cost,
Active RF Splitters
ADA4304-3/ADA4304-4
FEATURES
Ideal for CATV and terrestrial applications
2.4 GHz, −3 dB bandwidth
1 dB flatness: 54 MHz to 865 MHz
Low noise figure: 4.6 dB
Low distortion
Composite second-order (CSO): −62 dBc
Composite triple beat (CTB): −72 dBc
Nominal 3 dB gain per output channel
25 dB output-to-output isolation, 50 MHz to 1000 MHz
75 Ω input and outputs
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
FUNCTIONAL BLOCK DIAGRAMS
5V
5V
0.1µF
0.1µF
1µH
VCC
IL
0.01µF
VIN _ADA4304-3
GND
VOUT1
VOUT2
VOUT3
0.01µF
0.01µF
0.01µF
Figure 1.
5V
5V
0.1µF
0.1µF
1µH
VCC
IL
0.01µF
VIN _ADA4304-4
GND
VOUT1
VOUT2
VOUT3
VOUT4
0.01µF
0.01µF
0.01µF
0.01µF
GENERAL DESCRIPTION
The ADA4304-3/ADA4304-4 are 75 Ω active splitters for use in
applications where a lossless signal split is required. Typical
applications include multituner digital set-top boxes, cable
splitter modules, multituners/digital cable ready (DCR)
televisions, and home gateways where traditional solutions
require discrete passive splitter modules with separate fixed
gain amplifiers.
Figure 2.
The ADA4304-3/ADA4304-4 are fabricated using the Analog
Devices, Inc., proprietary silicon germanium (SiGe),
complementary bipolar process, enabling them to achieve very
low levels of distortion with a noise figure of 4.6 dB. The parts
provide low cost alternatives that simplify designs and improve
system performance by integrating a signal splitter element and
a gain block into a single IC. The ADA4304-3/ADA4304-4 are
available in a 16-lead LFCSP and operate in the extended
industrial temperature range of −40°C to +85°C.
Rev. 0
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