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Forum Post: RE: ADS8528: Issue Writing to the Configuration Register

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Hello,

I wasn't able to get the INT signal to work, so I decided to use the negative edge of the busy signal, which works.

The problem I am having now is that some of the data read from the ADC doesn't match what measured using an oscilloscope.

Can you please verify I am computing the voltages correctly (I am using the 2.5V internal reference and 4*VREF):

Positive Counts:

Actual Voltage = ADC Count * 4* 2.5V/4095

Negative Counts:

Actual Voltage = 2's compliment of ADC Count * 4 * 2.5V/4095

 

Also, it looks like some of the channels are using 8 instead of 4 in the equation above.

Stephen

 


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