1:3 Single-Ended, Low Cost, Active RF Splitters

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.

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.

Applications

* Set-top boxes

* Residential gateways

* CATV distribution systems

* Splitter modules

* Digital cable ready (DCR) TVs Data Sheet, Rev. 0, 11/07

* 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