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Original question:

LM7321: Negative Bias Supply with grounded Positive supply

LM7321: Can you help review my VCOM circuit?

PYTsai
Genius 10515 points
Part Number: LM7321

HI 

Would you help review my circuit below, is it ok for -0.21V ~ -3.03V VCOM ? Where VSN is -6.5V. Thanks!

  • 0
    TI__Expert 6625 points

    Hi PYTsai,

    The circuit should work fine for an input voltage between -0.21V to -3.03V. Also for this application you can also consider using a low-voltage op-amp since you're buffering signals between -0.21V to -3.03V. Low-voltage devices typically have better output swing to rail, if that's something that you're interested in. 

    Best Regards,

    Bala Ravi