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Simple circuit for AD7190

Question asked by StephanB on Dec 19, 2013
Latest reply on Dec 20, 2013 by StephanB

I need to accurately measure a solar cell using an AD7190. The solar cell has two wires + and -  (Volt range expected for the cell is 0 to 5V)

The diagrams for AD7190 all seem to have load cell examples for weighing scales. Is there a simple example for measuring the voltage of a simple unit that has just two wires.

I will appreciate any help you can give to let me know how I should connect a solar cell to the AD7190.

I have enclosed below a few pins an some thoughts I have thus far but as you can see I am not clear about what should be connected to what.

 

AVdd= ?

DVdd= ?

AGND=DGND=0V  ?

REFIN1(+)= (Solar Cell +)  ?

REFIN1(-)=0V (Solar cell ground ?) (Are all Grounds / 0V linked to be a common ground?)

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