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LMH7220: Questions regarding pinout

Lauren Mayfield
Expert 7180 points
Part Number: LMH7220

Hi,

I have questions regarding the LMH7220.

- Can the GND pin be connected to a -12V supply?

- What will the output be referenced to?

- Can the negative input be driven with a bipolar input?

Thanks!
Lauren

  • 0
    TI__Expert 4555 points

    Lauren,

    1. Can the GND pin be connected to a -12V supply?

    As long as you do not violate the absolute maximum ratings for the device (VCC - GND <= 13.5V) and operate the device in accordance to the operating ratings (2.7V-13V), then the GND pin can be connected to a -12V supply. 

    2. What will the output be referenced to?

    The output will be referenced to GND of the device.

    3. Can the negative input be driven with a bipolar input?

    By negative input I assume you mean the inverting pin of the device. The absolute max rating of the device can tolerate GND - 0.2V - VCC +0.2 volts on its inputs. However the input range of the device for it to operate properly is GND - 0.2V - VCC - 2V.

    Regards,

    Jonny