CN-0429 - setvbias limits


I have the boards from the Circuit Note 429 and I am trying to set the voltage bias on one of the boards to -600mV.

When using the command: "setvbias -600", the response is "Sensor bias set to -600 mV". However, using the "ReadConfigs" command, the Vbias is now set to -88mV.

Using trial and error, the minimum reliable negative setting is -128mV.

Is this the lowest limit of the bias setting?

Many thanks,


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