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AD2S1205: incremental encoder gives wrong output

Category: Hardware
Product Number: AD2S1205

I am using a 8.192Mhz clock on an AD2S1205 with the setup from the datasheet.

The A and B encoder signals are outputting a 1MHz signals even when the resolver is connected or disconnected from the circuit.

Someone else describes the exact same problem here.

AD2S1205: incremental encoder emulation failure - Q&A - Precision ADCs - EngineerZone (analog.com)

Does anyone have an idea on what this issue might be?