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參數(shù)資料
| 型號(hào)： | M34501E4FP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片4位微機(jī)的CMOS |
| 文件頁(yè)數(shù)： | 35/113頁(yè) |
| 文件大?。?/td> | 1252K |
| 代理商： | M34501E4FP |
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35
4501 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
(15) Definition of A-D converter accuracy
The A-D conversion accuracy is defined below (refer to Figure 31).
Relative accuracy
Zero transition voltage (V
0T
)
This means an analog input voltage when the actual A-D con-
version output data changes from
“
0
”
to
“
1.
”
Full-scale transition voltage (V
FST
)
This means an analog input voltage when the actual A-D con-
version output data changes from
“
1023
”
to
”
1022.
”
Linearity error
This means a deviation from the line between V
0T
and V
FST
of
a converted value between V
0T
and V
FST
.
Differential non-linearity error
This means a deviation from the input potential difference re-
quired to change a converter value between V
0T
and V
FST
by 1
LSB at the relative accuracy.
Absolute accuracy
This means a deviation from the ideal characteristics between 0
to V
DD
of actual A-D conversion characteristics.
Fig. 31 Definition of A-D conversion accuracy
V
FST
–
V
0T
1022
V
DD
1024
Vn: Analog input voltage when the output data changes from
“
n
”
to
“
n+1
”
(n = 0 to 1022)
1LSB at relative accuracy
→
(V)
1LSB at absolute accuracy
→
(V)
V
DD
V
1022
V
n
V
1
V
0
V
n
+
1
n
+
1
n
1022
1023
1
0
b
a
c
Output data
Differential non-linearity error =
Linearity error =
[LSB]
c
a
b
–
a
a
[L
S
B
]
Actual A-D conversion
characteristics
a
b
c
:
1
V
n
D
a
L
S
+
i
f
n
B
1
–
f
e
d
V
n
r
e
a
b
y
r
e
l
a
t
i
v
e
a
c
c
u
r
a
c
y
:
:
n
t
c
u
e
a
l
b
V
n
e
t
w
e
e
n
i
d
e
a
l
V
n
c
Zero transition voltage (V
0T
)
A
n
a
l
o
g
v
o
l
t
a
g
e
Full-scale transition voltage (V
FST
)
Id
b
e
a
t
w
l
e
l
i
e
n
e
n
V
0
–
o
f
A
V
1
-
D
2
c
2
o
n
v
e
r
s
i
o
n
e
0
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