TAA5242: MICBIAS, VREF PSRR

Hi Imi-san,

We don't have a specification on MICBIAS/VREF PSRR in the datasheet of the TAA5242.

Let me check on this further and get back to you by next week.

Thanks and Regards,

Lakshmi Narasimhan 

Hi Lakshmi-san,

Could you please let us know the PSRR performance.

Best regards,

Hi Imi-san,

We don't have specifications for the PSRR numbers you have requested, so I would need to measure them on a few devices.

Just to confirm the requirements before measuring, we need the PSRR from AVDD to the VREF/MICBIAS outputs at 1.8V AVDD condition, is that correct?

Thanks and Regards,

Lakshmi Narasimhan

Hi Lakshmi-san,

We checked with the customer about the test condition.

Yes. our customer requests 1.8V AVDD to VREF/MICBIAS PSRR data.

Best regards,

Hi Imi-san,

Thank you for the confirmation.

I can do the measurement on a few devices and get back to you with the measured values by the end of this week.

Thanks and Regards,

Lakshmi Narasimhan

Hi Lakshmi-san,

Thank you very much for your help!! I understood.

Best regards,

You're welcome Imi-san.

I will post an update on this thread by end of this week, as mentioned earlier.

Thanks and Regards,

Lakshmi Narasimhan

Hi Imi-san,

The AVDD-to-MICBIAS PSRR at 1.8V AVDD is ~112dB for a 100mVpk-pk, 1kHz ripple on the AVDD supply.

Thanks and Regards,

Lakshmi Narasimhan

Hi Lakshmi-san,

I understood AVDD to MICBIAS PSRR at 1.8V AVDD is 112dB at 1kHz/100mVpp on AVDD. Could you let us know AVDD to VREF PSRR ?

best regards,