STM32MP157C datasheet(207/260 Pages) STMICROELECTRONICS

Teilenummer	STM32MP157C

Bauteilbeschribung	Arm® dual Cortex®-A7 800 MHz Cortex®-M4 MPU, 3D GPU, TFT/DSI, 37 comm. interfaces, 29 timers, adv. analog, crypto

PDF	260 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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207 / 260 page

DS12505 Rev 5

207/260

STM32MP157C/F

Electrical characteristics

238

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 82. 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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