Hello,
Our customer has a question how to set channel gain without ADC power off, ever since he could see the datasheet description in below bold potion.
Is he able to set channel gain by following 3 options
1) channel gain setting without ADC poeer off
2) channel gain setting at ADC_PDZ=0d (Power down all ADC and PDM channels)
3) the other way for setting channle gain without ADC power off
[ TAA3040 datasheet ]
6.3.6.1 Programmable Channel Gain and Digital Volume Control
The device has an independent programmable channel gain setting for each input channel that can be set to the appropriate value based on the maximum input signal expected in the system and the ADC VREF setting used (see the Section 6.3.4 section), which determines the ADC full-scale signal level.
Configure the desired channel gain setting before powering up the ADC channel and do not change this setting while the ADC is powered on. The programmable range supported for each channel gain is from 0 dB to 42dB in steps of 1 dB. To achieve low-noise performance, the device internal logic first maximizes the gain for the front-end low-noise analog PGA, which supports a dynamic range of 120 dB, and then applies any residual programmed channel gain in the digital processing block.
Best regards,
