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Original question:

OPA189: About input protection

THS3491: About Absolute Maximum Ratings

Taroimo
Intellectual 680 points

Part Number: THS3491
Other Parts Discussed in Thread: DAC80502

Dear TI team

 

I have a question related to the content of the thread below.

https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1248158/opa189-about-input-protection

 

We are evaluating the attached circuit with the THS3491 on it.

Since the external VCC_3.3V becomes valid earlier than the THS3491, the potential of the PD pin may momentarily exceed "(+VS)+0.5".

Still, according to the absolute maximum ratings, each pin of the DAC80502 can withstand up to ±10mA current at the device input during fault conditions, so I think it's okay.

Is the above understanding correct?

 

Best Regards,

Taroimo