9 Limitation
Issue observed
The OPAMP offset value is minimized using a trimming circuitry. At startup, the trimming values are initialized with
the preset factory trimming values. The trimming values of OPAMP1, OPAMP2 and OPAMP4 are not programmed
correctly, resulting in a large offset compared to the one specified.
Proposed workaround
The offset values of OPAMP1, OPAMP2 and OPAMP4 must be calibrated by software, applying the calibration
procedure described in the STM32G4 Series advanced Arm
®
-based 32-bit MCUs reference manual (RM0440), in
the Calibration section of the Operational amplifiers (OPAMP) chapter. Such a procedure is already implemented
in the STM32CubeG4 MCU Package.
Parts impacted
This applies only to the MB1367-based NUCLEO-G474RE boards within the following range of serial numbers:
A191300001-A191304602.
UM2505
Limitation
UM2505 - Rev 2
page 36/43
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