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OPA LT1359 single power supply using

Dear Sir,

I try to using LT1359 for single power supply application,

got problem for that, any suggestion ?

test1.png is a normal dual power supply 

test2.png I try to using single power supply but not work.

Thanks for your time.

Typhoon

attachments.zip
  • Hi Typhoon,

    The transfer function of your circuit is:

    In test1 that you have given the circuit will work just fine since the amplifier will only see it as a non-inverting configuration yielding your correct result.

    In test2 substituting your values on the transfer function your Vout will be 12Vpp at Voffset = -9V which is outside the range of the amplifier with your supply.

    May I know what your intended application is? What is your signal source? Are just trying to center your output? Perhaps you should use a difference amplifier with a dedicated ref pin.

    Best Regards,
    Goz