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Diodes Pericom: A product line of Diodes Incorporated


The ZNBG3118 is a bias and control solution designed for Satellite Low Noise Blocks (LNB’s). Providing three bias stages to power control and protect the GaAs or HEMT FET low noise amplifier’s (LNA’s). The ZNBG3118 integrates an accurate voltage detector to select the LNB polarisation channel and an advanced tone detector to select the local oscillator (LO) for band switching.


  • Single Output LNB’s
  • Two single type twin LNB’s
  • Low power LNB’s
  • PLL Single LNB’s


  • Provides bias for up to three GaAs and HEMT FETs
  • Dynamic FET protection and temperature compensation
  • Drain current set by external resistor
  • Regulated negative rail generator requires only 2 external capacitors
  • Accurate voltage detector and polarisation switch for LNB’s
  • 22kHz tone detection for band switching with rejection of unwanted signals
  • Band switch supports both Discrete, MIMIC and PLL local oscillators
  • Compliant with ASTRA control specifications
  • Low current for power efficient systems
  • Wide operating supply range of 3.3V to 8V
  • Product Specifications

    Product Parameters

    LNA Bias Stages 3
    Mixer Bias Stages -
    VOUT - V
    Maximum Total Load - mA
    VPOL 15.5 V
    FTONE 22 kHz
    LNA IDRAIN 15 mA
    Mixer IDRAIN na mA
    VG OFF -2.5 V
    VNEG -2.5 V

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