STM32F100C datasheet(82/98 Pages) STMICROELECTRONICS

82 / 98 page

Electrical characteristics

STM32F100xC, STM32F100xD, STM32F100xE

82/98

Doc ID 15081 Rev 7

Note:

ADC accuracy vs. negative injection current: Injecting a negative current on any analog

input pins should be avoided as this significantly reduces the accuracy of the conversion

being performed on another analog input. It is recommended to add a Schottky diode (pin to

ground) to analog pins which may potentially inject negative currents.

Table 52.

RAIN max for fADC = 12 MHz

(1)

Guaranteed by design, not tested in production.

Ts (cycles)

tS (µs)

RAIN max (kΩ)

1.5

0.125

0.4

7.5

0.625

5.9

13.5

1.125

11.4

28.5

2.375

25.2

41.5

3.45

37.2

55.5

4.625

71.5

5.96

239.5

Table 53.

ADC accuracy - limited test conditions(1)(2)

ADC DC accuracy values are measured after internal calibration.

Preliminary values.

Symbol

Parameter

Test conditions

Typ

Max

Unit

Total unadjusted error

fPCLK2 = 24 MHz,

fADC = 12 MHz, RAIN < 10 kΩ,

VDDA = 3 V to 3.6 V

VREF+ = VDDA

TA = 25 °C

Measurements made after

ADC calibration

±1.5

±2.5

LSB

Offset error

±1

±2

Gain error

±0.5

±1.5

Differential linearity error

±1.5

±2

Integral linearity error

±1.5

±2

Table 54.

ADC accuracy(1) (2) (3)

ADC DC accuracy values are measured after internal calibration.

Better performance could be achieved in restricted VDD, frequency, VREF and temperature ranges.

Preliminary values.

Symbol

Parameter

Test conditions

Typ

Max

Unit

Total unadjusted error

fPCLK2 = 24 MHz,

fADC = 12 MHz, RAIN < 10 kΩ,

VDDA = 2.4 V to 3.6 V

TA = Full operating range

Measurements made after

ADC calibration

±2

±5

LSB

Offset error

±1.5

±2.5

Gain error

±1.5

±3

Differential linearity error

±1.5

±2.5

Integral linearity error

±1.5

±4.5

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