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TL082H: Application of input voltage range

Nanxiao Zhong
Intellectual 1470 points
Part Number: TL082H
Other Parts Discussed in Thread: TL082

Hi Team 

As the datasheet shows, input voltage range is Vcc-+2V.Can I understand that when the reverse pin(VF1) is lower than the voltage value, TL082H will work abnormally or even fail.

  • 0
    Guru 140200 points

    Hi Naxiao,

    by "input voltage range" the voltages directly at the +input and -input of OPAmp is meant.

    Kai

  • +1 in reply to kai klaas69
    TI__Intellectual 1470 points

    Hi kai

    Thanks for your answer.  As my simulation model, when VF1 is 0V and VF2 is settled from 10 to 100mV(lower than (VCC-+2V)) , the output of  U1 is clamp to 27mV,whether it is make reason? And when I connect Vcc- to -12V, the output is consistent with the theoretical value, which V- and V+ meet datasheet requirment.

    So can I think that TL082H is more suitable for power supply products powered by positive and negative voltage rails instead of single voltage rail?

  • +1 in reply to Nanxiao Zhong
    Guru 140200 points

    Hi Nanxiao,

    Nanxiao Zhong said:
    So can I think that TL082H is more suitable for power supply products powered by positive and negative voltage rails instead of single voltage rail?

    Correct. The TL082H is no input-rail-to-rail OPAmp. If your input voltage goes down to VEE, then the TL082 is not suited in your circuit.

    Kai