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Original question:

TLV2186: Output state when supply voltage below the recommended minimum

TLV2186: Similar part with shutdown

Steven Shenker
Intellectual 890 points
Part Number: TLV2186
Other Parts Discussed in Thread: OPA2734, OPA2334

Hi there,

Is there a part that someone can recommend with similar characteristics to the TLV2186 but also with a shutdown pin? I have some instabilities using this opamp in a composite opamp circuit (this opamp drives the input of another opamp) where the second opamp in the chain has an enable line and this causes some instabilities when enabling/disabling due to the TLV2186 going to its full output when the second opamp is disabled (ie the feedback is disabled). 

If there is no similar part you can recommend or is there any other workaround I can do do manage the TLV2186 output at zero volts when the second opamp is disabled (feedback is disabled). 

I know this is quite a tricky situation. Thanks in advance for any advice,

Steven 

  • 0
    TI__Guru 64430 points

    The only zero-drift dual op amps with shutdown are OPA2734 (max 12V supply) and OPA2334 (max 7V). One workaround is to use power supply instead of enable/disable to shutdown both op amps. If you need further assistance, please show detailed schematic including supply voltages and specify the range of the input voltages (no floating nodes, please).

  • +1 in reply to Marek Lis
    TI__Guru 64430 points

    It's been more than a week since last reply.  I'll close this inquiry for now.