32 Gb/s Linear Transimpedance Amplifier with AGC

    Discontinued >

    End of Life announced February 22, 2016 (PCN16-0027)
    Recommended replacement for new designs: TGA4872

    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 24-32 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
    • 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

    Qorvo's TGA4864 is a 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 TGA4864 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 TGA4864 is manufactured in a reliable high-speed SiGe process that combines excellent performance together with cost-effectiveness.

    The TGA4864 complies with the OIF intradyne receiver MSA. The TGA4864 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 TGA4864, for example, also includes a versatile bandwidth tuning function.

    Typical Applications

      • 100 Gb/s DP-QPSK (Dual Polarization 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) 28
    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
    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