STM32F745ZE datasheet(152/227 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F745xx STM32F746xx

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DocID027590 Rev 4

5.3.25

DAC electrical characteristics

TCoeff(2)

Temperature coefficient

ppm/°C

tSTART(2)

Startup time

µs

1. Shortest sampling time can be determined in the application by multiple iterations.

2. Guaranteed by design.

Table 71. internal reference voltage (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 72. Internal reference voltage calibration values

Symbol

Parameter

Memory address

VREFIN_CAL Raw data acquired at temperature of 30 °C VDDA = 3.3 V

0x1FF0 F44A - 0x1FF0 F44B

Table 73. DAC characteristics

Symbol

Parameter

Min

Typ

Max

Unit

Comments

VDDA

Analog supply voltage

1.7(1)

-3.6

VREF+

Reference supply voltage

1.7(1)

-3.6

VREF+ ≤VDDA

VSSA

Ground

RLOAD(2) Resistive load with buffer ON

RO(2)

Impedance output with buffer

OFF

When the buffer is OFF, the Minimum

resistive load between DAC_OUT and

VSS to have a 1% accuracy is 1.5 MΩ

CLOAD(2) Capacitive load

Maximum capacitive load at DAC_OUT

pin (when the buffer is ON).

DAC_OUT

min(2)

Lower DAC_OUT voltage

with buffer ON

0.2

It gives the maximum output excursion of

the DAC.

It corresponds to 12-bit input code

(0x0E0) to (0xF1C) at VREF+ = 3.6 V and

(0x1C7) to (0xE38) at VREF+ = 1.7 V

DAC_OUT

max(2)

Higher DAC_OUT voltage

with buffer ON

VDDA −

0.2

DAC_OUT

min(2)

Lower DAC_OUT voltage

with buffer OFF

-0.5

It gives the maximum output excursion of

the DAC.

DAC_OUT

max(2)

Higher DAC_OUT voltage

with buffer OFF

VREF+ −

1LSB

IVREF+(4)

DAC DC VREF current

consumption in quiescent

mode (Standby mode)

-170

240

µA

With no load, worst code (0x800) at

VREF+ = 3.6 V in terms of DC

consumption on the inputs

-50

With no load, worst code (0xF1C) at

VREF+ = 3.6 V in terms of DC

consumption on the inputs

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