STM32F101XF datasheet(95/117 Pages) STMICROELECTRONICS

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STM32F101xF, STM32F101xG

Electrical characteristics

Figure 47. ADC accuracy characteristics

Table 59. ADC accuracy(1) (2)(3)

1. ADC DC accuracy values are measured after internal calibration.

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

3. ADC accuracy vs. negative injection current: Injecting negative current on any of the standard (non-robust)

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 standard

analog pins which may potentially inject negative current.

Any positive injection current within the limits specified for IINJ(PIN) and ΣIINJ(PIN) in Section 5.3.13 does not

affect the ADC accuracy.

Symbol

Parameter

Test conditions

Typ

Max(4)

4. Preliminary values.

Unit

Total unadjusted error

fPCLK2 = 28 MHz,

fADC = 14 MHz, RAIN < 10 kΩ,

VDDA = 2.4 V to 3.6 V

Measurements made after

ADC calibration

±2

±5

LSB

Offset error

±1.5

±2.5

Gain error

±1.5

±3

Differential linearity error

±1

±2

Integral linearity error

±1.5

±3

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