Dear All: I have a question about ADC grounding. In the "Sensor Signal Conditioning" published by ADI, the grounding is recommanded to connect only in the power supply. Also the ADC is regarded as analog device and is grounded to AGND. My question is that if AGND and DGND is connected only in the power supply, the current from DAC to buffer will flow through DGND - power supply -AGND too. It's a big current loop, isn't it? Will it bring noise to ADC's AGND? Or I should use another ground method?
15 years ago