32 Gbps Dual Differential Input Linear Transimpedance / Variable-Gain Amplifier


  • 100G / 200G reconfigurable, colorless networks
  • 200G coherent receivers for 16-QAM
  • 100G coherent receivers for DP-QPSK
  • 40G coherent receivers for DP-BPSK


  • Supports data rates up to 32 Gbps
  • Dual monolithic TIA/VGA
  • 50 Ω to 5 kΩ differential electrical gain
  • Excellent 3 dB bandwidth
  • Adjustable output amplitude
  • Automatic or manual gain control
  • Peak detector output
  • Output control
  • Low power consumption
  • Available in die form: 1.6 mm x 1.4 mm


The IN3250TA is a dual, differential linear transimpedance/variable-gain amplifier (TIA/VGA) for 100G/200G coherent detection receivers for reconfigurable, colorless networks.

The IN3250TA offers two gain control modes: manual gain control and automatic gain control. In manual mode, the gain is controlled from 50 Ω to 5 KΩ differential via an external control pin. In automatic mode, the gain is automatically adjusted to deliver a constant output voltage.

The IN3250TA includes an adjustable bandwidth feature that allows the user to optimize receiver frequency response for different photodiode and ADC/DSP combinations.

The IN3250TA operates from a single +3.3 V power supply, and is available in die form.


Interconnect Group

Long Haul/Metro

Product Type

Transimpedance Amplifiers

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