Oddly, I can't find this information in the datasheet or product listing. How many bits are converted from the output of the PGA?
I am using the TLV320ADC3140 to capture audio at sample rates of up to 96kS/sec, to be saved in a .WAV file. Hence, I am reading out 16-bit samples from the serial interface. I had assumed that 16-bits is also the resolution of the ADC, which seems typical for this class of device.
Here's the confusion: If I apply 6-dB of digital gain, that should effectively shift the data word one bit to the left, so the LSB would always be 0. With 24dB, the 4 LSBs should be 0. Yet this is not what I see happening, so clearly the device is capturing more bits internally than it is outputting. My question is how many bits are being converted?
Thanks.
