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AD7655 does not convert analog input in normal mode!

Question asked by 9114313 on Jan 22, 2016
Latest reply on Mar 5, 2016 by 9114313

HI. I have bought a AD7655 ADC. And set pins like below:

CNVST => 0.4MHz

RD => GND

IMPULSE => GND

Vref => 2.5 v

and input1 of channel A is selected.(INA!)

RESET <= GND

 

But the Busy pin is always high. what is the problem with my configuration? If the Analog Input is floating, can ADC convert noise to the digital output?

in addition, How can I know that my ADC is working properly and has not failed?

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