MB90F463APF datasheet(77/88 Pages) FUJITSU

77 / 88 page

MB90460/465 Series

DS07-13714-2E

A/D Converter Glossary

(Continued)

Resolution :

Analog changes that are identifiable with the A/D converter

Linearity error :

The deviation of the straight line connecting the zero transition point

(“00 0000 0000”

←→ “000000 0001”) with the full-scale transition point

(“11 1111 1110”

←→ “11 1111 1111”) from actual conversion characteristics

Differential linearity error : The deviation of input voltage needed to change the output code by 1 LSB from the

theoretical value

Total error :

The total error is defined as a difference between the actual value and the theoretical

value, which includes zero-transition error/full-scale transition error and linearity error.

3FF

3FE

3FD

004

003

002

001

AVss

AVR

Analog input

1.5 LSB

0.5 LSB

{1 LSB

× (N − 1) + 0.5 LSB}

Actual conversion

value

Actual conversion

value

Theoretical

characteristics

VNT

(Measured value)

Total error

Total error for digital output N

VNT

− {1 LSB × (N − 1) + 0.5 LSB}

[LSB]

1 LSB

= (Theoretical value)

AVR

− AVSS

[V]

1024

VOT (Theoretical value)

= AVSS + 0.5 LSB [V]

VFST (Theoretical value)

= AVR − 1.5 LSB [V]

VNT : Voltage at a transition of digital output from (N

− 1) to N

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