Unipolar (0-2V) Fast ADC Operation
Posted: Wed Mar 30, 2022 1:56 am
Hi All,
There's some documentation available for the fast DAC describing how voltage bias is added to the fast DAC output to shift its level from unipolar 0-2V to the standard -1 to +1V range. By removing some resistors you can remove this and turn the DAC in to a unipolar, 0-2V output (https://ln1985blog.wordpress.com/2016/0 ... rformance/)
Is there any equivalent modification possible for the fast ADCs that would change the LV range to 0-2V? I have been looking for information on the "Amplifier & filter" frontend block for the ADC, but I guess this falls in the secret sauce portion of the hardware schematics. Additionally the reference designs in the ADC datasheet (LTC2145-14) are all for AC coupled signals.
Any thoughts on this would be greatly appreciated!
There's some documentation available for the fast DAC describing how voltage bias is added to the fast DAC output to shift its level from unipolar 0-2V to the standard -1 to +1V range. By removing some resistors you can remove this and turn the DAC in to a unipolar, 0-2V output (https://ln1985blog.wordpress.com/2016/0 ... rformance/)
Is there any equivalent modification possible for the fast ADCs that would change the LV range to 0-2V? I have been looking for information on the "Amplifier & filter" frontend block for the ADC, but I guess this falls in the secret sauce portion of the hardware schematics. Additionally the reference designs in the ADC datasheet (LTC2145-14) are all for AC coupled signals.
Any thoughts on this would be greatly appreciated!