STM32H533CE datasheet(181/231 Pages) STMICROELECTRONICS

181 / 231 page

DS14539 Rev 1

181/231

STM32H533xx

Electrical characteristics

200

Figure 46. 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.

5.3.24

Analog temperature sensor characteristics

ENOB

Effective number of

bits

DAC output buffer ON,

CL≤50 pF, RL ≥ 5 kΩ, 1 kHz

10.9

bits

DAC output buffer OFF,

CL ≤ 50 pF, no RL, 1 kHz

10.9

1. Evaluated by characterization - Not tested in production.

2. Difference between two consecutive codes minus 1 LSB.

3. Difference between the value measured at Code i and the value measured at Code i on a line drawn between Code 0 and

last Code 4095.

4. Difference between the value measured at Code (0x001) and the ideal value.

5. Difference between the ideal slope of the transfer function and the measured slope computed from code 0x000 and 0xFFF

when the buffer is OFF, and from code giving 0.2 V and (VREF+ - 0.2 V) when the buffer is ON.

6. Signal is −0.5 dBFS with Fsampling = 1 MHz.

Table 94. DAC accuracy(1) (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

R L

C L

Buffered/Non-buffered DAC

DAC_OUTx

Buffer(1)

12-bit

digital to

analog

converter

ai17157V3

Table 95. Analog temperature sensor characteristics

Symbol

Parameter

Min Typ Max

Unit

TL(1)

VSENSE linearity with temperature (from VSENSOR voltage)

°C

VSENSE linearity with temperature (from ADC counter)

Avg_Slope(2)

Average slope (from VSENSOR voltage)

mV/°C

Average slope (from ADC counter)

V30(3)

Voltage at 30 °C ± 5 °C

0.62

tstart_run

Startup time in Run mode (buffer startup)

25.2

µs

tS_temp(1)

ADC sampling time when reading the temperature

Isens(1)

Sensor consumption

0.18 0.31

µA

Isensbuf(1)

Sensor buffer consumption

3.8

6.5

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