ST7LITE3 datasheet(154/167 Pages) STMICROELECTRONICS

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ST7LITE3

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ADC CHARACTERISTICS (Cont’d)

ADC Accuracy with 3V≤VDD ≤5.5V

Notes:

1) Data based on characterization results over the whole temperature range, monitored in production.

Figure 102. ADC Accuracy Characteristics

Symbol

Parameter

Conditions

Typ

Max

Unit

|ET|

Total unadjusted error

fCPU=8MHz, fADC=4MHz

1.5

LSB

|EO|

Offset error

0.5

1.5

|EG|

Gain Error

1.5

|ED|

Differential linearity error

1.5

|EL|

Integral linearity error

1.5

1LSBIDEAL

1LSB

IDEAL

–

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 ADCDR

1023

1022

1021

4567

1021 1022 1023 1024

(1)

(2)

(3)

VDD

VSS

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