1:2 Single-Ended, Low Cost

Active RF Splitter

Data Sheet

ADA4303-2

Rev. A

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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

FUNCTIONAL BLOCK DIAGRAM

VIN

VO2

VO1

GND

VCC

0.01µF

IL

1µH

5V

5V

ADA4303-2

249Ω

249Ω

0.01µF

0.01µF

0.1µF

0.1µF

Figure 1.

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) and operates

in the extended industrial temperature range of −40°C to +85°C.

4

3

2

1

0

–1

–2

–3

–4

–5

–6

–7

–8

50

100

4000

1000

FREQUENCY (MHz)

Figure 2. Gain (S21) vs. Frequency