STM32F042F4 datasheet(80/117 Pages) STMICROELECTRONICS

80 / 117 page

Electrical characteristics

STM32F042x4 STM32F042x6

80/117

DocID025832 Rev 5

Equation 1: RAIN max formula

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

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

RAIN

fADC CADC

()

----------------------------------------------------------------

RADC

–

Table 55. RAIN max for fADC = 14 MHz

Ts (cycles)

tS (µs)

RAIN max (kΩ)

(1)

1.5

0.11

0.4

7.5

0.54

5.9

13.5

0.96

11.4

28.52.0425.2

41.52.9637.2

55.5

3.96

71.5

5.11

239.5

17.1

1. Guaranteed by design, not tested in production.

Table 56. ADC accuracy(1)(2)(3)

Symbol

Parameter

Test conditions

Typ

Max(4)

Unit

Total unadjusted error

fPCLK = 48 MHz,

fADC = 14 MHz, RAIN < 10 kΩ

VDDA = 3 V to 3.6 V

TA = 25 °C

±1.3

±2

LSB

Offset error

±1

±1.5

Gain error

±0.5

±1.5

Differential linearity error

±0.7

±1

Integral linearity error

±0.8

±1.5

Total unadjusted error

fPCLK = 48 MHz,

fADC = 14 MHz, RAIN < 10 kΩ

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

fPCLK = 48 MHz,

fADC = 14 MHz, RAIN < 10 kΩ

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

1. ADC DC accuracy values are measured after internal calibration.

STM32F042F4 датащи(PDF) 80 Page - STMicroelectronics

STM32F042F4 датащи(HTML) 80 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL