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Problem of internal voltage reference

Question asked by Vyacheslav Azarov on Jan 26, 2016
Latest reply on Jan 27, 2016 by Vyacheslav Azarov
Voltage reference source in STM32F334 very depend from temperature. Internal temperature sensor can help compensate this. But not known the real value of the temperature coefficient of reference source. Voltage reference has calibrate at 30 C only. This make impossible mathematically compensate drift, without additional testing. And makes useless the internal reference. Sorry.