參數(shù)資料
型號(hào): MBT678
廠商: Fujitsu Limited
英文描述: 16-Bit Proprietary Microcontroller
中文描述: 16位微控制器專有
文件頁(yè)數(shù): 98/106頁(yè)
文件大?。?/td> 1648K
代理商: MBT678
MB90670/675 Series
98
6.
A/D Converter Glossary
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”
“00 0000
0001”) with the full-scale transition point (“11 1111 1110”
“11 1111 1111”) from actual con-
version 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.
(Continued)
Total error
3FF
3FE
3FD
004
003
002
001
Analog input
AVRL
AVRH
Actual conversion
characteristics
D
V
(Measured value)
Actual conversion
characteristics
Theoretical
characteristics
0.5 LSB’
0.5 LSB’
{
1 LSB
×
(N – 1) + 0.5 LSB}
[V]
AVRH – AVRL
1024
1 LSB’ = (Theoretical value)
V
OT
’ (Theoretical value) = AVRL + 0.5 LSB’ [V]
V
FST
’ (Theoretical value) = AVRH – 1.5 LSB’ [V]
Total error for digital output N
[LSB]
V
NT
– {1 LSB’
×
(N – 1) + 0.5 LSB’}
1 LSB’
=
V
NT
: Voltage at a transition of digital output from (N – 1) to N
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