STM32U375CEU6GTR datasheet(33/222 Pages) STMICROELECTRONICS

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Analog input channels

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External analog inputs (per ADC): up to 15 GPIO pads

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1 channel for the internal reference voltage (VREFINT)

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1 channel for the internal temperature sensor (VSENSE)

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1 channel for monitoring the external VBAT power supply pin

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1 channel for monitoring VCORE internal voltage

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Connection to DAC internal channels

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Start-of-conversion can be initiated:

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By software for both regular and injected conversions

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By hardware triggers with configurable polarity (internal timers events or GPIO input events) for both

regular and injected conversions

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Conversion modes

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Each ADC can convert a single channel or can scan a sequence of channels

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Single mode converts selected inputs once per trigger

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Continuous mode converts selected inputs continuously

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Discontinuous mode

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Interrupt generation at ADC ready, the end of sampling, the end of conversion (regular or injected), end of

sequence conversion (regular or injected), analog watchdog 1, 2 or 3 or overrun events

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3 analog watchdogs per ADC

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ADC input range: VSSA <VIN < VREF+

3.20.1

Temperature sensor

The temperature sensor can be used to measure the junction temperature (TJ) of the device.

The temperature sensor is internally connected to the ADC input channels that are used to convert the sensor

output voltage to a digital value. When not in use, the sensor can be put in power-down mode. It supports the

temperature range –40 to 110°C.

The temperature sensor output voltage changes linearly with temperature. The offset of this line varies from chip

to chip due to process variation (up to 45°C from one chip to another). The uncalibrated internal temperature

sensor is more suited for applications that detect temperature variations instead of absolute temperatures.

To improve the accuracy of the temperature sensor measurement, each device is individually factory-calibrated by

ST. The temperature sensor factory calibration data are stored by STMicroelectronics in the system memory area,

accessible in read-only mode.

Table 10. Temperature sensor calibration values

Calibration value

name

Description

Memory address

TS_CAL1

Temperature sensor 12-bit raw data acquired by ADC1

at 30°C (± 5°C),

VDDA = VREF+ = 3.0 V (± 10 mV)

0x0BFA 0710 - 0x0BFA 0711

TS_CAL2

Temperature sensor 12-bit raw data acquired by ADC1

at 110°C (± 5°C),

VDDA = VREF+ = 3.0 V (± 10 mV)

0x0BFA 0742 - 0x0BFA 0743

3.20.2

Internal voltage reference (VREFINT)

The VREFINT provides a stable (bandgap) voltage output for the ADC and the comparators. The VREFINT is

internally connected to ADC1 and ADC2 input channels.

The precise voltage of VREFINT is individually measured for each part by STMicroelectronics during production

test and stored in the system memory area. It is accessible in read-only mode.

STM32U375xx

Functional overview

DS14861 - Rev 2

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