STM8S207MB datasheet(83/103 Pages) STMICROELECTRONICS

83 / 103 page

STM8S207xx, STM8S208xx

Electrical characteristics

Doc ID 14733 Rev 12

83/103

Table 45.

ADC accuracy with RAIN < 10 kΩ , VDDA = 5 V

Symbol

Parameter

Conditions

Typ

Max(1)

Data based on characterisation results for LQFP80 device with VREF+/VREF-, not tested in production.

Unit

|ET|

Total unadjusted error (2)

ADC accuracy vs. negative injection current: Injecting negative current on any of the 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 10.3.6 does not affect the ADC accuracy.

fADC = 2 MHz

2.5

LSB

fADC = 4 MHz

1.4

fADC = 6 MHz

1.6

3.5

|EO|

Offset error (2)

fADC = 2 MHz

0.6

fADC = 4 MHz

1.1

2.5

fADC = 6 MHz

1.2

2.5

|EG|

Gain error (2)

fADC = 2 MHz

0.2

fADC = 4 MHz

0.6

2.5

fADC = 6 MHz

0.8

2.5

|ED|

Differential linearity error (2)

fADC = 2 MHz

0.7

1.5

fADC = 4 MHz

0.7

1.5

fADC = 6 MHz

0.8

1.5

|EL|

Integral linearity error (2)

fADC = 2 MHz

0.6

1.5

fADC = 4 MHz

0.6

1.5

fADC = 6 MHz

0.6

1.5

Table 46.

ADC accuracy with RAIN < 10 kΩ RAIN, VDDA = 3.3 V

Symbol

Parameter

Conditions

Typ

Max(1)

Unit

|ET|

Total unadjusted error(2)

fADC = 2 MHz

1.1

LSB

fADC = 4 MHz

1.6

2.5

|EO|

Offset error(2)

fADC = 2 MHz

0.7

1.5

fADC = 4 MHz

1.3

|EG|

Gain error(2)

fADC = 2 MHz

0.2

1.5

fADC = 4 MHz

0.5

|ED|

Differential linearity error(2)

fADC = 2 MHz

0.7

fADC = 4 MHz

0.7

|EL|

Integral linearity error(2)

fADC = 2 MHz

0.6

1.5

fADC = 4 MHz

0.6

1.5

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