STM32F103ZCT7XXX datasheet(106/143 Pages) STMICROELECTRONICS

106 / 143 page

Electrical characteristics

STM32F103xC, STM32F103xD, STM32F103xE

106/143

DS5792 Rev 13

5.3.18

CAN (controller area network) interface

Refer to Section 5.3.14: I/O port characteristics for more details on the input/output alternate

function characteristics (CAN_TX and CAN_RX).

5.3.19

12-bit ADC characteristics

Unless otherwise specified, the parameters given in Table 59 are preliminary values derived

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

voltage conditions summarized in Table 10.

Note:

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

Table 59. ADC characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDDA

Power supply

2.4

3.6

VREF+

Positive reference voltage

2.4

VDDA

VREF-

Negative reference voltage

IVREF

Current on the VREF input

160(1)

220

µA

fADC

ADC clock frequency

0.6

MHz

fS(2)

Sampling rate

0.05

MHz

fTRIG(2)

External trigger frequency

fADC = 14 MHz

823

kHz

1/fADC

VAIN

Conversion voltage range(3)

0 (VSSA or VREF-

tied to ground)

-VREF+

RAIN(2)

External input impedance

See Equation 1 and

Table 60 for details

κΩ

RADC(2) Sampling switch resistance

κΩ

CADC(2)

Internal sample and hold

capacitor

tCAL(2)

Calibration time

fADC = 14 MHz

5.9

µs

-83

1/fADC

tlat(2)

Injection trigger conversion

latency

fADC = 14 MHz

0.214

µs

3(4)

1/fADC

tlatr(2)

Regular trigger conversion

latency

fADC = 14 MHz

0.143

µs

2(4)

1/fADC

tS(2)

Sampling time

fADC = 14 MHz

0.107

17.1

µs

1.5

239.5

1/fADC

tSTAB(2)

Power-up time

µs

tCONV(2)

Total conversion time

(including sampling time)

fADC = 14 MHz

µs

14 to 252 (tS for sampling +12.5 for

successive approximation)

1/fADC

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