Hi,
SNR in my customer setting is 22dB in below condition.
- PGA Gain : 40dB
- MICBIAS : 2.5V
- Input signal : 1kHz -60dBSPL
- Connect MIC to Jack 8 in EVM
Mic is https://panasonic.jp/msp_mic/p-db/RP-VC201_spec.html
- Other setting are below:
(1) The Figure 8 in datasheet shows SNR may have 40dB but SNR of above setting is 22dB. Could you please let me know how to achieve 40dB?
(2) SNR achieve 30dB when MICBIAS is disabled (power off). Is it mean MICBIAS may not help SNR?
Regards,
Nagata.
