ST92F124 datasheet(402/429 Pages) STMICROELECTRONICS

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ST92F124/F150/F250 - ELECTRICAL CHARACTERISTICS

10-BIT ADC CHARACTERISTICS (Cont’d)

ADC Accuracy (VDD=5V+/-10%, TA=-40°C to +125°C)

1. Typical data is based on TA=25°C, Vdd=5V

2. Monotonicity and No Missing Codes are guaranteed by design.

3. Refer to Figure 162. for the definition of these parameters.

Figure 162. ADC Accuracy Characteristics

Symbol

Parameter

Conditions

Typ 1)

Max

Unit

Monotonicity

Guaranteed 2)

No missing codes

Guaranteed 2)

|Et|

Total unadjusted error 3)

fADC = 4MHz

1.5

LSB

|Eo|

Offset error 3)

15.5

|Eg|

Gain Error 3)

1.5

|Ed|

Differential linearity error 3)

0.5

1.5

|El|

Integral linearity error 3)

0.5

1.5

1LSBIDEAL

1LSB

IDEAL

AVDD

AVSS

–

1024

-----------------------------------------

Vin (LSBIDEAL)

(1) Example of an actual transfer curve

(2) The ideal transfer curve

(3) End point correlation line

ET=Total Unadjusted Error: maximum deviation

between the actual and the ideal transfer curves.

EO=Offset Error: deviation between the first actual

transition and the first ideal one.

EG=Gain Error: deviation between the last ideal

transition and the last actual one.

ED=Differential Linearity Error: maximum deviation

between actual steps and the ideal one.

EL=Integral Linearity Error: maximum deviation

between any actual transition and the end point

correlation line.

Digital Result DiHR/DiLR

1023

1022

1021

4567

1021 1022 1023 1024

(1)

(2)

(3)

AVDD

AVSS

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