參數(shù)資料
型號(hào)： M37271MF-XXXSP
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
中文描述： 單芯片8位CMOS微機(jī)隱蔽字幕解碼器和屏幕顯示控制器
文件頁(yè)數(shù)： 28/97頁(yè)
文件大?。?/td> 1436K
代理商： M37271MF-XXXSP
MITSUBISHI MICROCOMPUTERS
M37271MF-XXXSP
M37271EF-XXXSP, M37271EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
28
[LSB]
[LSB]
(8) Definition of A-D Conversion Accuracy
The definition of A-D conversion accuracy is described below.
1
Relative accuracy
· Zero transition error (V
0T
)
The deviation of the input voltage at which A-D conversion output
data changes from “0” to “1,” from the corresponding ideal A-D
conversion characteristics between 0 and V
REF
.
· Non-linearity error
The deviation of the actual A-D conversion characteristics, from the
ideal A-D conversion characteristics between V
0
and V
254
.
(V
0
–1/2
V
REF
/256)
1LSB
V
0T
=
(V
REF
– 3/2
V
REF
/256) – V
254
1LSB
V
FST
=
Non-linearity error =
[LSB]
[LSB]
· Differential non-linearity error
The deviation of the input voltage required to change output data
by “1,” from the corresponding ideal A-D conversion characteris-
tics between 0 and V
REF
.
2
Absolute accuracy
· Absolute accuracy error
The deviation of the actual A-D conversion characteristics, from the
ideal A-D conversion characteristics between 0 and V
REF
.
V
n
– (1LSB
n + V
0
)
1LSB
[LSB]
Differential non-linearity error =
(V
n+1
– V
n
) – 1LSB
1LSB
Absolute accuracy error =
1LSB
A
with respect to absolute accuracy
=
1LSB with respect to relative accuracy
=
Note:
The analog input voltage “Vn” at which A-D conversion output
data changes from “n” to “n + 1” (n ; 0 to 254) is as follows
(refer to Figure 18).
V
254
– V
0
254
V
REF
256
[V]
[V]
Fig. 21. Definition of A-D conversion precision
· Full-scale transition error (V
FST
)
The deviation of the input voltage at which A-D conversion output
data changes from “255” to “254,” from the corresponding ideal A-
D conversion characteristics between 0 and V
REF
.
V
n
– 1LSB
A
(n+1/2)
1LSB
A
Output
data
0
Analog input
voltage (V)
V
0
Zero transition error (V
0T
)
V
n
V
n+1
V
254
V
REF
n
n+1
254
255
Differential non-
linearity error
LSB
A
Actual A-D
conversion
characteristics
1
2
3
2
V
1
1LSB
A
Ideal A-D conversion characteristics
between V
0
and V
254
LSB
A
1LSB
Absolute accuracy
Non-linearity error
Full-scale transition error
(V
FST
)
1LSB
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