ADA4303-2_15 Datasheet, PDF (1/12 Pages) Analog Devices – Single-Ended, Low Cost Active RF Splitter

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
VIN
0.01µF
VO1
ADA4303-2
0.01µF
VO2
0.01µF
GND
249Ω
249Ω
Figure 1.
4
T_A = –40°C
3
2
T_A = +25°C
1
0
T_A = +85°C
–1
–2
–3
–4
–5
–6
–7
–8
50
100
1000
FREQUENCY (MHz)
4000
Figure 2. Gain (S21) vs. Frequency
Rev. 0
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