參數(shù)資料
型號: MB91F647APMC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, 60 MHz, RISC MICROCONTROLLER, PQFP176
封裝: 24 X 24 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-176
文件頁數(shù): 32/136頁
文件大小: 4055K
代理商: MB91F647APMC
MB91645A Series
DS07-16911-1E
127
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}
(N
1)H
AVSS
AVRH
(N
2)H
NH
(N
+ 1)H
VFST
VNT
VOT
V(N+1)T
VNT
Linearity error
Differential linearity error
Digital
output
Digital
output
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
N
: 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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