7840A, Low Noise Optical Receiver, DOCSIS 3.1, CATV Application

The 7840A DOCSIS 3.1 Low Noise CATV Optical Receiver is a singlemode fiber pigtailed module featuring a low-noise, impedance-matched broadband photodiode and RF amplification.

The device receives optical analog and/or digital signals for a range of video broadcast options and delivers the corresponding RF electrical output. The wide bandwidth supports the delivery of up to 110 CATV analog signals or a combination of analog and digital channels (80/30 for example), including HDTV broadcast.

The 7840A DOCSIS 3.1 exhibits excellent distortion performance with values well above standards over the entire bandwidth and case temperature specifications (40 MHz – 1200 MHz, -40 °C to +85 °C).

Moreover, the proprietary impedance-match circuitry between the photodetector and RF amplification stages resolves a number of OEM design obstacles with very low noise performance value, typically less than 4.5 pA/√Hz.

The 7840A DOCSIS 3.1 Low Noise CATV optical receiver can be used in both 1310 nm and 1550 nm applications being useful at different points of a given network.

The 7840A DOCSIS 3.1 is compliant with all criteria of the Restriction of the Use of Hazardous Substances in Electrical and Electronic Equipment (RoHS) guidelines 2002/95/EC.


  • 5 Wide 40 MHz – 1200 MHz bandwidth supports as many as 110 CATV analog channels or a combination of analog and digital channels including HDTV broadcast.
  • Excellent RF frequency and distortion characteristics for high linearity.
  • Low noise (3.9 pA/√Hz typ.) low power dissipation (0.85 W max.) as well as high RF output.
  • RoHS compliant
  • Internal prorietary impedance match circuitry (75Ω)
  • Robust small package with singlemode fiber pigtail and connector options
  • Wide operating case temp range, -40° to + 85 °C


  • Video signal distribution in HFC and FTTx nodes
  • Video overlay in passive optical networks (PON).