MB91F613 datasheet(91/104 Pages) FUJITSU

91 / 104 page

MB91610 Series

DS07-16907-2E

• Definition of 10-bit A/D Converter Terms

• Resolution

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

• Linearity error

: Deviation of the line between the zero-transition point

(0000000000

←→0000000001) and the full-scale transition point

(1111111110

←→1111111111) from the actual conversion characteristics.

• Differential linearity error : Deviation from the ideal value of the input voltage that is required to change the

output code by 1 LSB.

• Total error

: Difference between the actual value and the theoretical value. The total error includes

zero transition error, full-scale transition error, and linear error.

(Continued)

3FFH

3FEH

3FDH

004H

003H

002H

001H

AVSS

AVRH

{1 LSB (N

− 1) + VOT}

− 1)H

AVSS

AVRH

− 2)H

+ 1)H

VFST

VNT

VOT

V(N+1)T

VNT

Linearity error

Differential linearity error

Actual conversion

characteristics

Actual conversion

characteristics

Ideal characteristics

(Actually-

measured

value)

Actual conversion

characteristics

Actual conversion characteristics

(Actually-measured

value)

(Actually-measured value)

Ideal characteristics

(Actually-measured

value)

(Actually-measured

value)

Analog input

: A/D converter digital output value.

VOT : Voltage at which the digital output changes from 000H to 001H.

VFST : Voltage at which the digital output changes from 3FEH to 3FFH.

VNT : Voltage at which the digital output changes from (N

− 1)H to NH.

Linearity error of digital output N

VNT

− {1 LSB × (N − 1) + VOT}

[LSB]

1 LSB'

Differential linearity error of digital output N

V (N+1) T

− VNT

− 1 [LSB]

1 LSB

VFST

− VOT

1022

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