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K10 VREFH/VREFL Input Capacitance (ADC Problem)

Question asked by Scott Christensen on Jun 2, 2014
Latest reply on Jun 3, 2014 by jeremyzhou

Hello,

 

Has anyone experienced a similar problem with ADC inputs on the K10?  The steady-state value in the center of the display is the voltage I'm trying to read.  The ADC is reporting the value at the bottom of the spikes - in this case ~79 mV too low.  Perhaps I need more capacitance at the input, or less capacitance on the VREFH/L pins?  Any advice will be appreciated.

 

Thanks.

 

temp input.jpg

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