STM32F372C8 datasheet(97/128 Pages) STMICROELECTRONICS

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STM32F37x

Electrical characteristics

Doc ID 022691 Rev 3

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Equation 1: RSRC max formula

The formula above (Equation 1) is used to determine the maximum external signal source

impedance allowed for an error below 1/4 of LSB. Here N = 12 (from 12-bit resolution).

Table 61.

RSRC max for fADC = 14 MHz

(1)

Guaranteed by design, not tested in production.

Ts (cycles)

tS (µs)

RSRC max (k)

1.5

0.11

0.4

7.5

0.54

5.9

13.5

0.96

11.4

28.5

2.04

25.2

41.5

2.96

37.2

55.5

3.96

71.5

5.11

239.5

17.1

Table 62.

ADC accuracy(1)(2) (3)

ADC DC accuracy values are measured after internal calibration.

Symbol

Parameter

Test conditions

Typ

Max(4)

Unit

Total unadjusted error

fADC = 14 MHz, RSRC < 10 k,

VDDA = 3 V to 3.6 V

TA = 25 °C

±1.3

±3

LSB

Offset error

±1

±2

Gain error

±0.5

±1.5

Differential linearity error

±0.7

±1

Integral linearity error

±0.8

±1.5

Total unadjusted error

fADC = 14 MHz, RSRC < 10 k,

VDDA = 2.7 V to 3.6 V

TA = -40 to 105 °C

±3.3

±4

LSB

Offset error

±1.9

±2.8

Gain error

±2.8

±3

Differential linearity error

±0.7

±1.3

Integral linearity error

±1.2

±1.7

Total unadjusted error

fADC = 14 MHz, RSRC < 10 k,

VDDA = 2.4 V to 3.6 V

TA = 25 °C

±3.3

±4

LSB

Offset error

±1.9

±2.8

Gain error

±2.8

±3

Differential linearity error

±0.7

±1.3

Integral linearity error

±1.2

±1.7

SRC

ADC





-------------------------------------------------------------- R

ADC

–



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