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PCM4204: High noise floor at fs 96KHz

Part Number: PCM4204

Hello,

Our customer is facing high noise floor problem on certain one channel on PCM4204 in their bords.

SNR is degrade to 108dB to 70dB compared with good device /ch 115dB. Occurrence is around 0.7% of devices.

Working condition is followings.

SCKI 24.576MHz,   Slave mode,   24-bit Left-Justified,  Fs 96kHz  (At 48KHz, noise is not problem)

SNR performace is not recovered even apply reset. This behavior is not re-produced on other test board.

What is application level check point to rescue 0.7% of PCM4204 on customer board?

Regards,

Mochizuki