STM32U5A5QJ datasheet(71/382 Pages) STMICROELECTRONICS

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DS13543 Rev 1

71/382

STM32U5Axxx

Functional overview

3.34

Comparators (COMP)

The devices embed two rail-to-rail comparators with programmable reference voltage

(internal or external), hysteresis and speed (low speed for low power) and with selectable

output polarity.

The reference voltage can be one of the following:

•

External I/O

•

DAC output channels

•

Internal reference voltage or submultiple (1/4, 1/2, 3/4)

All comparators can wake up from Stop 0, Stop 1 and Stop 2 modes, generate interrupts and

breaks for the timers and can also be combined into a window comparator.

3.35

Operational amplifiers (OPAMP)

The devices embed two operational amplifiers with external or internal follower routing and

PGA capability.

The operational amplifier features:

•

Low-input bias current

•

Low-offset voltage

•

Low-power mode

•

Rail-to-rail input

3.36

Multi-function digital filter (MDF) and audio digital filter (ADF)

The table below lists the set of features implemented into the MDF and the ADF.

Table 18. MDF features

MDF modes/features(1)

1. X = supported.

ADF1

MDF1

Number of filters (DFLTx) and serial interfaces (SITFx)

ADF_CKI0 / MDF_CKIy connected to pins

Sound activity detection (SAD)

RXFIFO depth (number of 24-bit words)

ADC connected to ADCITF1

ADC1

ADC connected to ADCITF2

ADC2

Motor dedicated features (SCD, OLD, OEC, INT, snapshot, break)

Main path with CIC4, CIC5

Main path with CIC1,2, 3 or FastSinc

RSFLT, HPF, SAT, SCALE, DLY, Discard functions

Autonomous in Stop mode

X(2)

2. Stop 0, Stop 1 and Stop 2 modes only.

X(3)

3. Stop 0 and Stop 1 modes only.

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