SLAZ473AG October   2012  – August 2021 MSP430FR5969 , MSP430FR5969-SP

 

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6.5 ADC64

ADC Module

Category

Functional

Function

Incorrect conversion result in extended sample mode in some conditions

Description

The ADC12 conversion result can be incorrect if the extended sample mode is selected (ADC12SHP = 0), ADC12VRSEL is set to 0, 2, 4, 6, 12, 14 (VR+ and VR- unbuffered), and the ADC sample time is less than 6 ADC clock cycles.

Workaround

1) Use Pulse sample mode (ADC12SHP=1) if sample time less than 6 ADC clock cycles is needed;

OR

2) In extended sample mode (ADC12SHP = 0) increase the sample time to at least 6 ADC clock cycles;

OR

3) Use reference mode corresponding to ADC12VRSEL =1,3,5,7,9,13,15