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LMH6702QML-SP: LMH6702QML-SP

Ilya Revzin
Prodigy 100 points
Part Number: LMH6702QML-SP
Other Parts Discussed in Thread: LMH6702, TINA-TI

Hello
I use LMH6702QML-SP in the following topology:

In general, I am satisfied with his work, but I would like to reduce his current consumption. In this regard, can I increase the feedback resistance (237ohms), and if yes, how much?

Best wishes

Ilya

  • 0
    Guru 140200 points
    Hi Ilya,

    current feedback amplifiers don't like it when the feedback resistor differs too much from the recommended value the OPAmp is designed for. The datasheet says on page 8:

    "The LMH6702 is optimized for use with a 237Ω feedback resistor. Using lower values can lead to excessive ringing in the pulse response while a higher value will limit the bandwidth."

    So, yes, if you can live with a reduced bandwidth, the feedback resistor can be increased a bit.

    Have you already run a TINA-TI simulation?

    Kai
  • 0
    TI__Guru 62930 points
    Ilya,
    The engineer responsible for this device is out today. He can add to Kai's comments below soon.
    Regards,
    Wade