DS90UB926Q-Q1: Input signal at no power supply

Tomohiro Nagasawa

Expert 1710 points

Part Number: DS90UB926Q-Q1

Dear support team

Is there problem of latch up even when the signal is inputed on RIN + and RIN - while Vdd is not applied?

Regards

Tomohiro Nagasawa

over 9 years ago

0 Palaniappan Manickam over 9 years ago

TI__Genius 10475 points

Hello,
This thread has been assigned for someone to review and respond to.

0 Liam Keese over 9 years ago

TI__Genius 12705 points

Hello,

Input voltage should be kept below ABS max values -0.3V and 2.75V. As there are AC coupling capacitors required on RIN +/- inputs to the DS90UB926 typically this is not a concern.

0 Tomohiro Nagasawa over 9 years ago in reply to Liam Keese

Expert 1710 points

Hello Liam-san

Thank you for response. Let me check again.

My understanding is that even if the RIN signal(below ABS max) is input while VDD is not applied at DS90UB926-Q1, there is no problem. Is it correct?

Regards

Tomohiro Nagasawa

0 Liam Keese over 9 years ago in reply to Tomohiro Nagasawa

TI__Genius 12705 points

Yes. recommend PDB should also remain low.

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DS90UB926Q-Q1: Input signal at no power supply