STM32F051R4U7(2012) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F051R4U7
(Rev.:2012)

Low- and medium-density advanced ARM™-based 32-bit MCU with 16 to 64 Kbytes Flash, timers, ADC, DAC and comm. interfaces

STMicroelectronics 

STM32F051x

Electrical characteristics

6.3.15

Note:

12-bit ADC characteristics

Unless otherwise specified, the parameters given in Table 54 are preliminary values derived

from tests performed under ambient temperature, fPCLK2 frequency and VDDA supply voltage

conditions summarized in Table 20.

It is recommended to perform a calibration after each power-up.

Table 54. ADC characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDDA

fADC

fS(1)

Analog supply voltage for

ADC ON

ADC clock frequency

Sampling rate

fTRIG(1) External trigger frequency

fADC = 14 MHz

VAIN Conversion voltage range

RAIN(1) External input impedance

RADC(1)

CADC(1)

Sampling switch resistance

Internal sample and hold

capacitor

tCAL(1) Calibration time

See Equation 1 and

Table 55 for details

fADC = 14 MHz

tlatr(1) Trigger conversion latency

JitterADC

ADC jitter on trigger

conversion

fADC = fPCLK/2 = 14 MHz

fADC = fPCLK/2

fADC = fPCLK/4 = 12 MHz

fADC = fPCLK/4

fADC = fHSI14 = 14 MHz

fADC = fHSI14

2.4

-

0.6

-

0.05

-

-

-

-

-

0

-

-

-

-

-

-

-

0.188

5.9

83

0.196

5.5

0.219

10.5

-

-

1

3.6

14

1

823

17

VDDA

50

V

MHz

MHz

kHz

1/fADC

V

kΩ

1

kΩ

8

0.259

-

pF

µs

1/fADC

µs

1/fPCLK

µs

1/fPCLK

µs

1/fHSI14

tS(1)

tSTAB(1)

Sampling time

Power-up time

tCONV(1)

Total conversion time

(including sampling time)

fADC = 14 MHz

fADC = 14 MHz

0.107

-

17.1

µs

1.5

-

239.5 1/fADC

0

0

1

µs

1

18

µs

14 to 252 (tS for sampling +12.5 for

successive approximation)

1/fADC

1. Guaranteed by design, not tested in production.

Doc ID 022265 Rev 3

77/105

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