STM32L031C6 datasheet(85/118 Pages) STMICROELECTRONICS

номер детали	STM32L031C6

подробное описание детали	Access line ultra-low-power 32-bit MCU ARM-based Cortex-M0, up to 32KB Flash, 8KB SRAM, 1KB EEPROM, ADC

PDF	118 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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85 / 118 page

DocID027063 Rev 4

85/118

STM32L031x4/6

Electrical characteristics

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).

tCAL(3)

Calibration time

fADC = 16 MHz

5.2

µs

1/fADC

WLATENCY

ADC_DR register write

latency

ADC clock = HSI16

1.5 ADC

cycles + 2

fPCLK cycles

1.5 ADC

cycles + 3

fPCLK cycles

ADC clock = PCLK/2

4.5

fPCLK

cycle

ADC clock = PCLK/4

8.5

fPCLK

cycle

tlatr(3)

Trigger conversion latency

fADC = fPCLK/2 = 16 MHz

0.266

µs

fADC = fPCLK/2

8.5

1/fPCLK

fADC = fPCLK/4 = 8 MHz

0.516

µs

fADC = fPCLK/4

16.5

1/fPCLK

fADC = fHSI16 = 16 MHz

0.252

0.260

µs

JitterADC

ADC jitter on trigger

conversion

fADC = fHSI16

-1

1/fHSI16

tS(3)

Sampling time

fADC = 16 MHz

0.093

10.03

µs

1.5

239.5

1/fADC

tSTAB(3)

Power-up time

µs

tConV(3)

Total conversion time

(including sampling time)

fADC = 16 MHz

0.875

10.81

µs

14 to 173 (tS for sampling +12.5 for

successive approximation)

1/fADC

1. VDDA minimum value can be decreased in specific temperature conditions. Refer to Table 58: RAIN max for fADC = 16

MHz.

2. A current consumption proportional to the APB clock frequency has to be added (see Table 34: Peripheral current

consumption in Run or Sleep mode).

3. Guaranteed by design.

4. Standard channels have an extra protection resistance which depends on supply voltage. Refer to Table 58: RAIN max for

fADC = 16 MHz.

Table 57. ADC characteristics (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

AIN

ADC





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

ADC

–



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