General > General Technical Chat

DMM problem in DC millivolts range

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tooki:
Yeah but it could be a minor error, like a configuration bit for input impedance. (In theory; I don't know what the chip can and cannot do.)

amir.razzaqi:

--- Quote from: tooki on July 19, 2023, 11:10:33 pm ---Yeah but it could be a minor error, like a configuration bit for input impedance. (In theory; I don't know what the chip can and cannot do.)

--- End quote ---

But as I mentioned I active write protected mode of EEPROM before reading it.

tooki:
Yes, but if wrong voltages were applied, as you suggested may have happened, it could have caused unpredictable behavior or damage.

amir.razzaqi:

--- Quote from: tooki on July 20, 2023, 08:31:21 am ---Yes, but if wrong voltages were applied, as you suggested may have happened, it could have caused unpredictable behavior or damage.

--- End quote ---
That EEPROM is "atmel 24c02" and can handle up to 5.5 volt

Gyro:
Yes, the 24C02 has a supply range of 1.7 - 5.5V, it will be on the same supply rail as the DTM0660 DMM chip though. This has a supply voltage range of 2.4 - 3.6V (Abs max 4V). This will have created some (over)stress.

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