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Unstable ADC reading result

irawan1
Associate II

‎2006-01-16 06:16 PM

Posted on January 17, 2006 at 03:16

Unstable ADC reading result

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irawan1
Associate II

‎2011-05-17 03:09 AM

Posted on May 17, 2011 at 12:09

Dear all,

i am using upsd3333d-80 pins, to measure voltage using adc ch0.

The voltage measured came from a voltage divider using resister 2M7 and 300K, and the range of the the voltage being measured is 0-2.5V at ADC input pin. The VRef is connected to TS431 that gives 3.04V. My problem is i always got varying result of ADC reading (2-3 bit error). Any hints or suggestion, will be appreciated.

thanks.

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