DAC1282: digitally transferring analog ground exploration signals

Hello Uri,

Question1: Looking for best ADC and DAC for digitally transferring analog ground exploration signals from sensors at 2 to 250 Hz. Please advise.

I am making an assumption that "digitally transferring analog ground exploration signals" means that your are interested in using the ADS1282 for seismic type applications (usually using geophones as the sensor). If this assumption is correct, then you've definitely found the correct family of parts! These devices were specifically designed for seismic applications. 

You might want to look into the ADS1283 as it has a CS pin, a bit better SNR, and lower power consumption.

The DAC1282 is the partner DAC for the ADS128x series, so you have that correct as well.

Question2: Is DAC1282 used only an ADC tester? Else, is this part best to recover ADC1282 input?

Can you please explain what you mean by recover the ADC1282? I'm not sure what this means.

In general, the DAC1282 is primarily used to as a test signal to test the ADS128x. I call out the series specifically because the DAC1282 is always tested with the ADS1282 in context of the specifications in the datasheet. The DAC1282 is pretty noisy but the ADS128x digital filters cancel out the noise from the DAC which makes the datasheet seem better than what it is. Here's an E2E post for more context on the matter. However, if you plan to use the DAC1282 with the DAC128x then the datasheet is very accurate!

I have heard of the DAC being used to test the state of the geophone or sensor (in addition to the ADC) but I haven't heard the DAC being used for much else in the system. I also think the diagram in the DAC1282 datasheet does a good job showing the traditional use case for the ADS128x and DAC1282 (small reminder that I recommend using the ADS1283 if you intend to use the DAC with multiple ADCs as the CS pin is absent on the ADS1282).

Best,

-Cole