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TLV2333: Differential input voltage TLV2333IDR

Part Number: TLV2333

Dear Sir or Madam,

I have a question about the TLV2333IDR operational amplifier:
What is the permissible differential input voltage without destroying the OPV?
Is it enough to limit the input current to max. 10 mA as described in chapter 8.3.2 Fig. 18?
In Fig. 20 it is visible that the OPV contains two clamp diodes and two 10 kOhm resistors to protect against too high differential input voltages.

In other data sheets, e.g. the OP07CD, there is a precise specification for the differential input voltage, e.g. Differential input voltage = max. ±30 V.

Thank you very much for your help.

With kind regards

Manuel Christ

  • Those resistors are part of the EMI protection; the current limit is just a side effect.

    Due to these resistors, the current between the pins is much smaller than that through the power rail clamping diodes (see footnote (2) in section 7.1). In other words, if you try to apply a large differential voltage, the absolute voltage at each pin will be exceeded first. So it is not necessary to impose a limit on the differential voltage.

  • Hi Manuel,

    any differential input voltage is allowed which does not violate the absolute maximum ratings regarding the individual input voltages. Or by other words, as long as the individual input voltages (at the +input and the -input) do not violate the absolute maximum ratings, the resulting differential input voltage will not destroy the OPAmp. The internal 10k resistors will automatically limit the current through the back-to-back protection diodes between the inputs (see figure 20 of datasheet) to a safe level.

    Because of that there's no need to specify an absolute maximum rating for the differential input voltage.

    Kai

  • Hello Kai,

    thank you very much for your help.

    Its clear now