13 Gb/s Linear Transimpedance Amplifier with AGC

Part # TGA4861

Last Time Buy   End of Life announced February 22, 2016 (PCN16-0027)
Last Time Buy Sept. 1, 2016.
Contact your local sales representative for assistance.

Key Features

  • Excellent linearity and low total harmonic distortion of <1% for Vout,se<350mVpp
  • Able to handle large DC input currents
  • Tunable frequency response of 8.5-13.5 GHz
  • Large dynamic range of 26dB typical
  • Manual gain or AGC mode selectable
  • Multiple amplifier stages to achieve high gain
  • Output shutdown function
  • Peak level detection
  •  Input signal strength indicator (optional)
  • Dual TIA die with +3.3 V single supply voltage
  • Compliant with OIF intradyne receiver MSA
  • SiGe technology with ƒT / ƒmax of 170 / 250 GHz


The TGA4861 is a state of the art TIA with integrated AGC designed for coherent DP-QPSK receivers with baud rates up to 44.6Gbps. It features a very low total harmonic distortion which is not only crucial for DP-QPSK, but also enables higher-level QAM applications.

In addition, the TGA4861 features two compensating circuits that allow it to handle large DC input currents as well as large offsets between these currents. This is, among others, important for colorless applications.

The TGA4861 is manufactured in a reliable high-speed SiGe process that combines excellent performance together with cost-effectiveness.

The TGA4861 complies with the OIF intradyne receiver MSA. The TGA4861 is a dual TIA and thus contains two TIA/AGC circuits on each die. In addition to the many features defined in the OIF MSA, the TGA4861, for example, also includes a versatile bandwidth tuning function.


Bandwidth (GHz) 11
Small Signal Gain (dB)
Differential Transimpedance Gain (ohm) 250 to 4,800
Differential Output Vpp (mV) 200 to 900
Equivalent Input Noise (pA/rtHz) 24
Voltage (V) 3.3
Current (mA) 175
RoHS  Yes
Lead Free  Yes
Halogen Free  Yes

Product Documents

Typical Applications

Additional Information

Status Last Time Buy