1:2 Single-Ended, Low Cost, Active RF Splitter

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.

Applications

* Set-top boxes

* Residential gateways

* CATV distribution systems

* Splitter modules

* Digital cable ready (DCR) TVs

* 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