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LMH6739: Question Asking

Part Number: LMH6739

Hi team,

My customer has some questions about this IC, please see below questions.

1.The circuit is set to 1x magnification, how much mA does the -5V_VGA need?

2. If the voltage and current of -5V_VGA are too small, will it affect the magnification? Is there a corresponding graph?

  • Hi,

    this is specified in page 3 of datasheet: Up to 40mA with all OPAmps enabled and with no load.

    But why have you installed 4.7p caps at the output? Please remove them and use instead figure 24 of datasheet, if you want to prevent unity gain peaking.

    Kai