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Subject: AD7856 problem

Date: 10/16/03 at 7:31 AM
Posted by: Epsilon
E-mail: epsil_on[AT55]mail.ru (replace [AT55] with @ to reply)
Message Posted:

Hi, there! I have a problem. I try to work with AD7856 - charging capacitors analog-to-digital converter. I get about 1000 samples into MCU (ST10F269) and then analyze that graphically. I see some noise, about +-30 LSB, but it is not question. There is also high 1-sample peaks (100-200 LSBs up and down from approximated middle value). These peaks looks like randomously, and I think, that is not a noise! Help me! What it happens ? What I must add to scheme to destroy this? Reference voltage is 4.096 Volts, not noisy, input is constant, about 2 V, not noisy.
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