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Help!!!  My AD7192 is working way to well, without an input buffer...

Question asked by Shannon on Apr 26, 2014
Latest reply on Apr 28, 2014 by Shannon

Can anyone explain why with a 4.096 RefV going to a Pic18F4553 and a single 5V supply on a BREADBOARD... If I ground AINCOM and put any small voltage,,, example 0.0001 or 0.0455 of a volt all the way to 3 volts onto AIN1, It read's this exactly.. I'm using a 6 digit Voltmeter to compare.. This is with the the AD7192 buffer turned ON..??

The data sheet specifies that the buffer needs headroom of AGND + 250 mV, yet the AD7192 is tracking the input voltage well below that spec perfectly.  Am I missing something... I'm certainly not complaining, as this would be Ideal but I am wondering...

Any comments would be appreciated... thanks... 

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