32 Gb/s Dual Linear Transimpedance Amplifier with AGC

    Key Features

    • Dual channel fully differential transimpedance amplifier
    • Excellent linearity and low total harmonic distortion
    • Able to handle large DC input currents
    • Adjustable bandwidth and amplitude frequency response
    • Large dynamic range
    • Manual gain control or AGC modes of operation
    • Adjustable output voltage range in AGC mode
    • Multiple amplifier stages to achieve high gain
    • Output shutdown function
    • Input and output signal level detection
    • Compliant with OIF micro-intradyne coherent receiver IA

    Qorvo's TGA4872 is a dual channel fully differential state of the art TIA with integrated AGC designed for coherent DP-QPSK receivers with baud rates up to 128Gbps. 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 TGA4872 has compensating circuits that allow it to handle large DC input currents as well as large offsets between these currents. This is important for colorless applications. The TGA4872 is manufactured in a reliable highspeed SiGe process that combines excellent performance together with cost-effectiveness.

    Typical Applications

      • 100 Gb/s DP-QPSK (Dual Polarization QPSK)
      • 100 Gb/s Linear Driver: DP-QPSK
      • Coherent systems with a baud rate of up to 128 Gbps
      • TIA with AGC for long-haul or metro optical receiver modules
    Bandwidth(GHz) 30
    Differential Transimpedance Gain(ohm) 100 to 7,500
    Differential Output Vpp(mV) 200 to 900
    Equivalent Input Noise(pA/rtHz) 20
    Voltage(V) 3.3
    Current(mA) 186
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No

    This product appears in the following application block diagrams:

    • Applications > Network Infrastructure > Optical > Optical Systems (10, 40, 100, 200 to 400GB/s)

      Optical Systems (10, 40, 100, 200 to 400GB/s)

    • Applications > Network Infrastructure > Optical > Coherent Transceiver Module

      Coherent Transceiver Module