Transimpedance Amplifiers
  • GN1032
  • 2.5Gb/s Transimpedance Amplifier with Automatic Gain Control
  • GN1052
  • 10/11.3 Gb/s Limiting Transimpedance Amplifier
  • GN1052CW
  • 10/11.3Gb/s Transimpedance Amplifier
  • GN1052CWA2
  • 10/11.3Gb/s Transimpedance Amplifier
  • GN1052WA2
  • 10/11.3Gb/s Transimpedance Amplifier
  • GN1055
  • 10/11.3 Gb/s Limiting Transimpedance Amplifier with Slicing Adjust
  • GN1056
  • 10/11.3 Gb/s Linear Transimpedance Amplifier
  • GN1057
  • 10/11.3 Gb/s Transimpedance Amplifier with Automatic Gain Control
Semtech GN1035

Semtech GN1035

GN1035 2.5Gb/s Transimpedance Amplifier with Automatic Gain Control

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Gennum's GN1035 is a fully integrated, silicon germanium transimpedance amplifier; providing wideband, low noise pre-amplification of signal current from a photodetector.

It features differential outputs, and incorporates an automatic gain control mechanism to increase dynamic range, allowing input signals up to 2.6 mA peak. A decoupling capacitor on the supply is the only external circuitry required.


  • Single +3.3V power supply
  • Power dissipation 125mW (typ)
  • Input noise current = 250nA rms when used with a 0.5pF detector
  • Transimpedance gain 10k? into 100? load (differential)
  • Bandwidth (-3dB) = 2.0GHz
  • No photodiode bypass capacitor required in PIN-based applications.
  • RSSI (received signal strength indicator) current output operates from sensitivity to overload, selectable source or sink
  • Bondpad configuration, and output polarity control, allow for maximum flexibility in pin-out in a TO Can ROSA
  • On-chip filter to improve sensitivity and control bandwidth


  • Gigabit Ethernet
  • 2x Fibre Channel
  • PCI Express
  • Infiniband

Order Codes

GN1035CWA-CHIPBare Die
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