[ts-7000] noise level on MAX197 on 7250

["j.chitte" <>]

Hi,

I am struggling a bit to get clean data off the ADC. Sometimes 
(rarely) it is just a couple of mV bipolar noise, ie 2 LSB on the 5V 
unipolar range I am using. This is fine and matches the spec of the 
MAX197

However, most of the time its 10 or 20 mV which makes a bit of a joke 
of the 12bit ADC precision.

I was wondering if there is enough external capacitance on the 197 
Vref.

Anyone routinely getting better than this?

Thanks.




 
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