Analog Devices Inc. ADA4304-3/-4 Single-Ended Active RF Splitters

Analog Devices Inc. ADA4304-3/-4 Single-Ended Active RF Splitters are 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/-4 are fabricated using the ADI proprietary silicon germanium (SiGe), complementary bipolar process, enabling them to achieve very low levels of distortion with a noise figure of 4.6dB. 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.


  • Ideal for CATV and terrestrial applications
  • 2.4GHz, −3dB bandwidth:
    • 1dB flatness is 54MHz to 865MHz
  • 4.6dB low noise figure
  • Low distortion:
    • −62dBc Composite second-order (CSO)
    • −72dBc Composite triple beat (CTB)
  • Nominal 3dB gain per output channel
  • 25dB output-to-output isolation, 50MHz to 1000MHz
  • 75Ω input and outputs
  • 16-lead, 3mm × 3mm LFCSP small package


  • Set-top boxes
  • Residential gateways
  • CATV distribution systems
  • Splitter modules
  • Digital Cable Ready (DCR) TVs

Functional Block Diagrams

Published: 2014-04-15 | Updated: 2022-03-11