STWBCTR datasheet(29/36 Pages) STMICROELECTRONICS

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STWBC

Electrical characteristics

ADC accuracy characteristics at VDD/VDDA 5 V

Table 17. ADC accuracy characteristics at VDD/VDDA 5 V

Symbol

Parameter

Typ.(1)

1. Temperature operating: TA= 25 °C.

Min.(2)

2. Data based on characterization results, not tested in production.

Max.(2)

Unit

|ET|

Total unadjusted error(3) (4), (5)

3. ADC accuracy vs. negative injection current. Injecting negative current on any of the analog input pins

should be avoided as this reduces the accuracy of the conversion being performed on another analog

input. It is recommended a Schottky diode (pin to ground) to be to added to standard analog pins which

may potentially inject negative current. Any positive injection current within the limits specified for IINJ(PIN)

and

IINJ(PIN) in the I/O port pin characteristic section does not affect the ADC accuracy. The ADC accuracy

parameters may be also impacted exceeding the ADC maximum input voltage VIN1 or VIN2.

4. Results in manufacturing test mode.

5. Data aligned with trimming voltage parameters.

TBD

LSB

|EO|

Offset error(3), (4), (5)

0.5

|EG|

Gain error(3), (4), (5), (6)

6. Gain error evaluation with two point method.

0.4

EO+G

Offset + gain error(6), (7)

7. Temperature operating range: 0 ºC

 TA  85 ºC.

-8.3

8.9

EO+G

Offset + gain error(6), (8)

8. Temperature operating range: -25 ºC

 TA  105 ºC.

-10.9

10.9

EO+G

Offset + gain error(6), (9)

9. Temperature operating range: -40 ºC

 TA  105 ºC. 11.

-13.8

10.9

|ED|

Differential linearity error(1), (2), (3)

0.8

|EL|

Integral linearity error(3), (4), (5)

2.0

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