STM32L431 datasheet(148/200 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L431xx

148/200

DocID028800 Rev 1

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 ON

CL ≤ 50 pF, RL ≥ 5 kΩ

±30

LSB

DAC output buffer OFF

CL ≤ 50 pF, no RL

±12

TUECal

Total

unadjusted

error after

calibration

DAC output buffer ON

CL ≤ 50 pF, RL ≥ 5 kΩ

±23

LSB

SNR

Signal-to-noise

ratio

DAC output buffer ON

CL ≤ 50 pF, RL ≥ 5 kΩ

1 kHz, BW 500 kHz

-71.2

DAC output buffer OFF

CL ≤ 50 pF, no RL, 1 kHz

BW 500 kHz

-71.6

THD

Total harmonic

distortion

DAC output buffer ON

CL ≤ 50 pF, RL ≥ 5 kΩ, 1 kHz

--78

DAC output buffer OFF

CL ≤ 50 pF, no RL, 1 kHz

--79

SINAD

Signal-to-noise

and distortion

ratio

DAC output buffer ON

CL ≤ 50 pF, RL ≥ 5 kΩ, 1 kHz

-70.4

DAC output buffer OFF

CL ≤ 50 pF, no RL, 1 kHz

-71-

ENOB

Effective

number of bits

DAC output buffer ON

CL ≤ 50 pF, RL ≥ 5 kΩ, 1 kHz

-11.4-

bits

DAC output buffer OFF

CL ≤ 50 pF, no RL, 1 kHz

-11.5-

1. Guaranteed by design.

2. Difference between two consecutive codes - 1 LSB.

3. Difference between measured value at Code i and the value 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 ideal slope of the transfer function and measured slope computed from code 0x000 and 0xFFF when

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

Table 71. DAC accuracy(1) (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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