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LTC2944 voltage ADC accuracy

Category: Datasheet/Specs
Product Number: LTC2944

Hello,

I am testing the LTC2944 to monitor battery charge and discharge.
While charging a 7.4V Li-Po battery, the voltage values read from registers I and J via I2C were off by 3% when compared to the voltage values measured on the sense pin with a tester.
I suspect that this error is too large. Is there any way to reduce this error?

Best regards,
Kunihiro