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Lower Limit of Input Voltage for AD1939

Question asked by Ahsan_SMARJ on Feb 11, 2015
Latest reply on Feb 20, 2015 by DaveThib

I am working with AD1939 in my project.  I got from the data sheet that the Internal Reference Voltage is 1.5V so that specifies that it is the upper limit for my input signal from the microphone to AD1939 ADC which will result in the highest digital word output from 24 bit ADC. As I am dealing with audio signals, so the voltage levels are in negative as well. Without offsetting the negative voltages to 0 V and more, what is the minimum signal voltage level below 0 V that will be translated as 0 digital word output by AD1939 ADC?

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