STM32F427AI datasheet(159/240 Pages) STMICROELECTRONICS

159 / 240 page

DS9405 Rev 12

159/240

STM32F427xx STM32F429xx

Electrical characteristics

197

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. N = 12 (from 12-bit resolution) and k is the number of

sampling periods defined in the ADC_SMPR1 register.

fS(2)

Sampling rate

(fADC = 30 MHz, and

tS = 3 ADC cycles)

12-bit resolution

Single ADC

Msps

12-bit resolution

Interleave Dual ADC

mode

3.75

Msps

12-bit resolution

Interleave Triple ADC

mode

Msps

IVREF+(2)

ADC VREF DC current

consumption in conversion

mode

300

500

µA

IVDDA(2)

ADC VDDA DC current

consumption in conversion

mode

1.6

1.8

1. VDDA minimum value of 1.7 V is obtained with the use of an external power supply supervisor (refer to Section 3.17.2:

Internal reset OFF).

2. Evaluated by characterization results.

3. VREF+ is internally connected to VDDA and VREF- is internally connected to VSSA.

4. RADC maximum value is given for VDD=1.7 V, and a minimum value for VDD=3.3 V.

5. For external triggers, a delay of 1/fPCLK2 must be added to the latency specified in Table 75.

Table 75. ADC characteristics (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 76. ADC static accuracy at fADC = 18 MHz

Symbol

Parameter

Test conditions

Typ

Max(1)

1. Evaluated by characterization - not tested in production results.

Unit

Total unadjusted error

fADC =18 MHz

VDDA = 1.7 to 3.6 V

VREF = 1.7 to 3.6 V

VDDA − VREF < 1.2 V

±3

±4

LSB

Offset error

±2

±3

Gain error

±1

±3

Differential linearity error

±1

±2

Integral linearity error

±2

±3

RAIN

k0.5

–

()

fADC CADC

()

---------------------------------------------------------------- RADC

–

STM32F427AI 数据表(PDF) 159 Page - STMicroelectronics

STM32F427AI 数据表(HTML) 159 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

数据表下载

链接网址

STM32F427AI 数据表(PDF) 159 Page - STMicroelectronics

STM32F427AI 数据表(HTML) 159 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

数据表 下载

链接网址

数据表下载