STM32U545NET3QTR datasheet(232/283 Pages) STMICROELECTRONICS

232 / 283 page

Electrical characteristics

STM32U545xx

232/283

DS14216 Rev 1

Offset

Offset error at code

0x800(3)

DAC output buffer OFF, CL ≤ 50 pF, no RL

±8

LSB

Offset1

Offset error at code

0x001(4)

DAC output buffer OFF, CL ≤ 50 pF, no RL

±5

OffsetCal

Offset error at code

0x800(3)

after calibration

DAC output buffer ON,

CL ≤ 50 pF, RL ≥ 5 kΩ

VREF+ = 3.6 V

±5

VREF+ = 1.6 V

±5

Gain

Gain error(5)

DAC output buffer ON, CL ≤ 50 pF, RL ≥ 5 kΩ

±0.5

DAC output buffer OFF, CL ≤ 50 pF, no RL

±0.5

TUE

Total unadjusted error

DAC output buffer OFF, CL ≤ 50 pF, no RL

±10

LSB

DAC output buffer ON, CL ≤ 50 pF, RL ≥ 5 kΩ,

after calibration

±14

SNR

Signal-to-noise

ratio(6)

DAC output buffer ON, CL ≤ 50 pF, RL ≥ 5 kΩ,

1 kHz, BW = 500 kHz

70.6

DAC output buffer OFF, CL ≤ 50 pF, no RL, 1 kHz,

BW = 500 kHz

-72

THD

Total harmonic

distortion(6)

DAC output buffer ON, CL ≤ 50 pF, RL ≥ 5 kΩ, 1 kHz

-79

DAC output buffer OFF, CL ≤ 50 pF, no RL, 1 kHz

-81

SINAD

Signal-to-noise and

distortion ratio(6)

DAC output buffer ON, CL ≤ 50 pF, RL ≥ 5 kΩ, 1 kHz

70.1

DAC output buffer OFF, CL ≤ 50 pF, no RL, 1 kHz

71.5

ENOB

Effective number

of bits

DAC output buffer ON, CL ≤ 50 pF, RL ≥ 5 kΩ, 1 kHz

11.3

bits

DAC output buffer OFF, CL ≤ 50 pF, no RL, 1 kHz

11.6

1. Specified by design. 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 transfer-function slope 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 114. DAC accuracy(1) (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

STM32U545NET3QTR Datasheet(PDF) 232 Page - STMicroelectronics

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