STM32MP151AAB3 datasheet(201/253 Pages) STMICROELECTRONICS

201 / 253 page

DS12500 Rev 3

201/253

STM32MP151A/D

Electrical characteristics

232

Figure 41. 12-bit buffered /non-buffered DAC

1. The DAC integrates an output buffer that can be used to reduce the output impedance and to drive external

loads directly without the use of an external operational amplifier. The buffer can be bypassed by

configuring the BOFFx bit in the DAC_CR register.

6.3.24

Voltage reference buffer characteristics

R L

C L

Buffered/Non-buffered DAC

DAC_OUTx

Buffer(1)

12-bit

digital to

analog

converter

ai17157V3

Table 80. VREFBUF characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDDA

Analog supply voltage

Normal mode

VSCALE = 000

2.8

3.3

3.6

VSCALE = 001

2.4

3.6

VSCALE = 010

2.1

3.6

VSCALE = 011

1.8

3.6

Degraded mode(2)

VSCALE = 000

1.62

2.80

VSCALE = 001

1.62

2.40

VSCALE = 010

1.62

2.10

VSCALE = 011

1.62

1.80

VREFBUF

_OUT

Voltage Reference

Buffer Output

Normal mode

@30 °C

@Iload = 10 uA

VDDA = 3.3 V

VSCALE = 000

2.498

2.500

2.502

VSCALE = 001

2.047

2.049

2.051

VSCALE = 010

1.800

1.804

1.807

VSCALE = 011

1.500

1.504

1.507

Degraded mode(2)

VSCALE = 000

VDDA-

220 mV

-VDDA

VSCALE = 001

VDDA-

220 mV

-VDDA

VSCALE = 010

VDDA-

220 mV

-VDDA

VSCALE = 011

VDDA-

220 mV

-VDDA

TRIM

Trim step resolution

±0.05

Load capacitor

0.5

1.50

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