Differential SAR ADC

[girih192002]

Hi

I am seeing strange problem while simulation sar adc.

ADC digital code for signal is as follows.

Signal Code
0.5V 0000 0000
0 1000 0000
-0.5V 1111 1111

I would like to invert it so that it start from max code to min code. any suggestions about this ? and one more question is why I am getting this code ?

 

[Dominik Przyborowski]

Maybe You need only to swap inputs in comparator?

 

[yagizhanugur]

I think you can invert your ADC input signal or you can change your Vref if your ic is support.

 

[Venkadesh_M]

in the ADC output put

255 - ANS

Thats all.