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| 型號： | M38C13E6HP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機 |
| 文件頁數(shù)： | 29/59頁 |
| 文件大?。?/td> | 1063K |
| 代理商： | M38C13E6HP |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C1 Group
29
Definition of A-D converter accuracy
The A-D conversion accuracy is defined below (refer to Figure 28).
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
“
255
”
to
”
254.
”
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
REF
(V
CC
in 38C1 Group) of actual A-D conversion characteristics.
V
REF
(V
CC
)
V
254
V
n
V
1
V
0
V
n+1
n
+
1
n
2
5
4
255
1
0
b
a
c
O
u
t
p
u
t
d
a
t
a
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
)
Analog voltage
Full-scale transition voltage (V
FST
)
Ideal line of A-D conversion
between V
0
–
V
254
Fig. 28 Definition of A-D conversion accuracy
V
FST
–
V
0T
254
V
REF*
256
Vn: Analog input voltage when the output data changes from
“
n
”
to
“
n+1
”
(n = 0 to 254)
1LSB at relative accuracy
→
(V)
1LSB at absolute accuracy
→
(V)
* V
REF
= V
CC
in the 38C1 Group.
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