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Question about LTC6811-2

Question asked by Kazu on Jan 10, 2018
Latest reply on May 3, 2018 by nin

Hi All,


I don't understand much about the value of the total measurement error.

In its data sheet page 24, that is explained as follows.

"For example, the 25C specification of that when measuring 3.3V in 7kHz mode is +/-1.2mV and the 25C specification

 for Vref1 is 3.2V +/-100mV."

- Why the total measurement error is +/-1.2mV (very small) though the Vref1 varies from 3.1V to 3.3V?

- The Vref1 is not the reference voltage for the internal 16 bit ADCs?


My LTC6811-2 does not work well. The measurement error is over +/-10mV when 2.5V in 7kHz mode.