STM32F107VB datasheet(70/95 Pages) STMICROELECTRONICS

70 / 95 page

Electrical characteristics

STM32F105xx, STM32F107xx

70/95

Doc ID 15274 Rev 4

Note:

ADC accuracy vs. negative injection current: Injecting a 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 currents.

Any positive injection current within the limits specified for IINJ(PIN) and UIINJ(PIN) in

Section 5.3.12 does not affect the ADC accuracy.

Table 53.

ADC accuracy - limited test conditions(1)

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

Symbol

Parameter

Test conditions

Typ

Max(2)

2. Based on characterization, not tested in production.

Unit

Total unadjusted error

fPCLK2 = 56 MHz,

fADC = 14 MHz, RAIN < 10 kY,

VDDA = 3 V to 3.6 V

TA = 25 °C

Measurements made after

ADC calibration

±1.3

±2

LSB

Offset error

±1

±1.5

Gain error

±0.5

±1.5

Differential linearity error

±0.7

±1

Integral linearity error

±0.8

±1.5

Table 54.

ADC accuracy(1) (2)

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

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

Symbol

Parameter

Test conditions

Typ

Max(3)

3. Based on characterization, not tested in production.

Unit

Total unadjusted error

fPCLK2 = 56 MHz,

fADC = 14 MHz, RAIN < 10 kY,

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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