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参数资料
| 型号： | M38C13E6HP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 10 X 10 MM, PLASTIC, LQFP-64 |
| 文件页数： | 22/59页 |
| 文件大小： | 955K |
| 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 (V0T)
This means an analog input voltage when the actual A-D con-
version output data changes from “0” to “1.”
Full-scale transition voltage (VFST)
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 V0T and VFST of a
converted value between V0T and VFST.
Differential non-linearity error
This means a deviation from the input potential difference re-
quired to change a converter value between V0T and VFST by 1
LSB at the relative accuracy.
Absolute accuracy
This means a deviation from the ideal characteristics between 0 to
VREF (VCC in 38C1 Group) of actual A-D conversion characteristics.
VREF
(VCC)
V254
Vn
V1
V0
Vn+1
n+1
n
254
255
1
0
b
a
c
Output data
Differential non-linearity error =
Linearity error =
[LSB]
c
a
b–a
a
[LSB]
Actual A-D conversion
characteristics
a: 1LSB by relative accuracy
b: Vn+1–Vn
c: Difference between ideal Vn
and actual Vn
Zero transition voltage (V0T)
Analog voltage
Full-scale transition voltage (VFST)
Ideal line of A-D conversion
between V0–V254
Fig. 28 Definition of A-D conversion accuracy
VFST–V0T
254
VREF*
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)
* VREF = VCC in the 38C1 Group.
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