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CODEC AD1836A  ADC verification

Question asked by blackfin on Jan 8, 2018
Latest reply on Jan 8, 2018 by blackfin

CODEC AD1836A AD converter working in differential input mode: ( Gain=1)

 

 

We have:

ADC2 Left Input 1=2.25V +small AC signal

ADC2 Left input 2=2.25V

 

Differential mode setting and gain=1.

 

The Data sheet says

Full-Scale Input Voltage (Differential) 2.18V ( RMS), 24 bit ADC

 

My question is :

(1)  If differential input voltage= -0.1V, what is the ADC2 digital output? Is ADC2 unipolar or bipolar?

(2) If differential input voltage=0.1V, what is the ADC2 digital output?

(3) if the differential input voltage is constant DC voltage, then will the ADC 2 output  be zero?

 

We have experience with other ADC, such as AD7714, but not familiar with ADC for CODEC.

we would like understand, verify and test how CODEC ADC works.

 

 

Thanks

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