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AD7982 evaluation tool problem

Question asked by Victor_sg on Jan 3, 2017
Latest reply on Jan 4, 2017 by Victor_sg

I bought A7982 evaluation board rev C (photo attached). After I installed SW tool from ADI website (Analog Devices 10 lead PulSAR 14/16/18bit ADC) following user guild instruction, it popped up "The System detected that AD7982 was connected". But I click "Read" or "Start Stream" button, no data shown, actually no response from SW interface.

I didn't connect any signal at Vin+ or Vin-. But I think it should get data to reflect this differential signal as "0". I measured board voltage, all seemed correct. VREF=5V, VDD=2.5V, V_DRIVE=3.3V, VIN+ and VIN- dc level are 2.5V.

I have tried the SW on both win7 and win10, same issue.

I don't know what's wrong. Can you help? Urgent. After evaluation, I need to start schematic capture. Thank you.