STM32H750VB datasheet(279/335 Pages) STMICROELECTRONICS

279 / 335 page

DS12556 Rev 5

279/334

STM32H750VB STM32H750ZB STM32H750IB STM32H750XB

Electrical characteristics (rev V)

311

Figure 92. 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.

ENOB

Effective number of

bits

DAC output buffer ON,

CL ≤ 50 pF, RL ≥ 5 ? , 1 kHz

10.9

bits

DAC output buffer OFF,

CL ≤ 50 pF, no RL, 1 kHz

10.9

1. Guaranteed by characterization.

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 −0.5dBFS with Fsampling=1 MHz.

Table 186. 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

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