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How to pump in 1V to VS+ from power supply for checking

Category: Hardware
Product Number: ADP1055

Hi All,

I connected 1v to VS+ from external power supply and connect VS- to AGND via 0ohm resistor. I did the READ_VOUT and there is reading almost close the Command out. And trim o VS+ can be done. However, I changing the value of Command OUT, does not adjust voltage accordingly. For example, at 12V output, 1 supplied 1V to VS+, then I change the command out to half to have output 6V, and meanwhile supplied 0.5V to the VS+. The output measured is still 12V.

So does it mean that I need to put a resistor from VS+ to VS- and connect a capacitor from VS- to GND ?

Please advice, thank you in advance.

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