OPA564: Can We Add Termination at IFLAG Pin of the OPA564

Wayne Chen (Audio AE)

Part Number: OPA564

Hi Sirs,

As a following of the thread on https://e2e.ti.com/support/amplifiers/f/14/t/912892 , customer would add termination on the IFLAG to prevent floating in disable mode.
Would you please advise if we can add 10kohm or 7kohm pull low resistor at IFLAG pin of the OPA564 as the proposal below? Any current consumption impact?

Thank you and Best regards,

Wayne Chen
08/10/2020

over 5 years ago

0 Zach Olson over 5 years ago

TI__Genius 11785 points

Hi Wayne,

The IFLAG pin is not commonly terminated for this part, but if termination is desired I would recommend a much larger resistor value than you have selected. The push-pull output of IFLAG is not very strong, so I would suggest a 500kΩ resistor terminated to V- or VDIG. This will allow the flag pin to overdrive the termination voltage when active.

Zach Olson

0 Wayne Chen (Audio AE) over 5 years ago in reply to Zach Olson

TI__Genius 15950 points

Thank you for your advise, Zach...Wayne Chen

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OPA564: Can We Add Termination at IFLAG Pin of the OPA564