MB96F348CWCPMC-GSE2 datasheet(89/109 Pages) CYPRESS

89 / 109 page

MB96340 Series

Document Number: 002-04579 Rev. *A

Page 89 of 109

14.5.1

Definition of A/D Converter Terms

■ Resolution: Analog variation that is recognized by an A/D converter.

■ Total error: Difference between the actual value and the ideal value. The total error includes zero transition error, full-scale transition

error and nonlinearity error.

■ Nonlinearity error: Deviation between a line across zero-transition line (“00 0000 0000” <--> “00 0000 0001”) and full-scale transition

line (“11 1111 1110” <--> “11 1111 1111”) and actual conversion characteristics.

■ Differential nonlinearity error: Deviation of input voltage, which is required for changing output code by 1 LSB, from an ideal value.

■ Zero reading voltage: Input voltage which results in the minimum conversion value.

■ Full scale reading voltage: Input voltage which results in the maximum conversion value.

3FF

3FE

3FD

004

003

002

001

AVRL

AVRH

VNT

1.5 LSB

0.5 LSB

{1 LSB

× (N − 1) + 0.5 LSB}

Actual conversion

characteristics

(Actually-measured value)

Actual conversion

characteristics

Ideal characteristics

Analog input

Total error of digital output “N”



VNT  {1 LSB  (N  1)  0.5 LSB}

1 LSB

[LSB]

1 LSB

 (Ideal value)

AVRH

 AVRL

1024

[V]

VOT (Ideal value)  AVRL  0.5 LSB [V]

VFST (Ideal value)  AVRH  1.5 LSB [V]

VNT : A voltage at which digital output transitions from (N  1) to N.

Total error

N: A/D converter digital output value

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