PCM1860-Q1: Making high resolution DC & AC measurements using an 24 bit Audio converter

Hi Josef,

To answer your questions:

• Sampling can be achieved nearly simultaneously on 2 channels at the same time, at 192kHz/24 bits :
  • Yes, there are 2-4 separate ADC in the device that will run at the same rate so the sampling happens simultaneously. 

• Can the sampling frequency changed to others values than the one given in the datasheets : example setting it to 100kHz, 50kHz…?
  • In general yes this should be supported but will require custom configuration and we would need to verify any non-audio rate works correctly as this is not the intended use-case.
• Does the sampling is simultaneous on 2 channels (1 way left-right)? What is the jitter?
  • Sampling is simultaneous but we don't have a spec for phase between the two but it should be very similar. Channel matching is quite good.

• Does the bandwidth include DC voltage?
  • A HPF is enabled by default but can be disabled.
• What is the precision I can expect with DC sampled voltage?
  • Audio devices are not trimmed for DC precision so the DC accuracy is not likely to be very good and will vary between devices. Accuracy is only trimmed to 0.5dB.
• What will be the rms noise with a flat gain (0dB)
  • This is given by the SNR spec. Roughly 13.3uVrms.
• As signal treatments achieved with raw datas thanks to uP, which digital link can be used to get them
  • I'm not sure I understand this question. The device supports I2S, TDM, and LJ output formats

Best,

Zak