Other Parts Discussed in Thread: AMC1311, AMC1300B-Q1, ISO224, AMC1311EVM
Hello, I was reading the discussion in this question but am still unclear on something: https://e2e.ti.com/support/amplifiers/f/14/t/908199
For an analog input voltage that can swing negative, it makes sense to me why we have a VCM_ADC. But the AMC1311 is a unipolar device, or in other words VIN can only range from 0-2V, and VOUTP will range from 1.44V to 2.44V, and VOUTN will range from 1.44V to 0.44V, just like in Fig 22 of the datasheet.
For a single-ended ADC with 3.3V reference, VCM_ADC = 1.65V. If we use the recommended circuit in Fig 50 of the datasheet with VCM_ADC = 1.65V, then when VIN = 0V (the minimum input voltage, because again the AMC1311 is unipolar), VOUT = 1.65V and we lose half of the ADC input range. Is this the necessary tradeoff to use the full input range of the AMC1311 or am I missing something?