TGA4957-SM

    28 Gb/s Optical Modulator Driver with Differential Input & Output

    Key Features

    • 40 Gb/s performance
    • Differential input and output
    • Adjustable output amplitude, 4 Vpp – 8 Vpp
    • Low additive RMS jitter, 600 fsec
    • High output drive, 8 Vpp differential output with 1 Vpp differential input
    • Gain, 22 dB at 14 GHz
    • Low DC power dissipation, 2.3 W for Vout = 8 Vpp at Vd = 5 V
    • Rise and fall times, 13 psec
    • QFN package size: 6x6 mm, 40 Lead

    Qorvo's TGA4957-SM is a differential input and output optical modulator driver designed to operate at frequencies that target the 40 Gb/s and 100 Gb/s optical markets.

    The TGA4957-SM consists of a wideband amplifier assembled in a QFN surface mount package combined with a minimum of external components. A single TGA4957-SM placed between the MUX and Optical Modulator provides OEMs with a differential modulator driver surface mount solution.

    The TGA4957-SM provides Metro and Long Haul designers with system critical features such as: low power dissipation, low rail ripple, high voltage drive capability (4 Vpp amplitude adjustable up to 8 Vpp), and very low output jitter.

    Several of the bias pins on the TGA4957-SM are internally set to simplify the users PCB design. Alternatively, these same pins can be adjusted by the user, if desired. Duplicate pins are available to enable biasing from either side of the package. The TGA4957-SM can be biased using a minimum of four separate power supplies.

    The TGA4957-SM is RoHS compliant. Evaluation boards are available upon request.

    Typical Applications

      • 40 Gb/s Optical Networks
      • 100 Gb/s Optical Networks
    Frequency Min(GHz) DC
    Frequency Max(GHz) 28
    Vpp(V) 4 to 8
    Gain(dB) 20
    3 dB Bandwidth(GHz) 22
    Voltage(V) 5
    Current(mA) 470
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No
    ECCN 5A991.B

    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