STM32U375CE datasheet(154/222 Pages) STMICROELECTRONICS

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Table 103. DAC accuracy

Specified by design and not tested in production.

Symbol

Parameter

Conditions

Min Typ Max Unit

DNL

Differential nonlinearity(1)

DAC output buffer ON

± 2

LSB

DAC output buffer OFF

± 2

Monotonicity

10 bits

guaranteed

INL

Integral nonlinearity(2)

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

± 4

LSB

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

± 4

Offset

Offset error at code 0x800(2)

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

± 8

LSB

Offset1

Offset error at code 0x001(3)

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

± 5

OffsetCal Offset error at code 0x800

(2)

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(4)

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(5)

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

THD

Total harmonic distortion(5)

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(5)

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. Difference between two consecutive codes minus 1 LSB.

2. 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.

3. Difference between the value measured at code (0x001) and the ideal value.

4. 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.

5. Signal is -0.5 dBFS with Fsampling = 1 MHz.

STM32U375xx

Electrical characteristics

DS14861 - Rev 2

page 154/222

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