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參數資料
| 型號： | MC44251FU |
| 廠商： | MOTOROLA INC |
| 元件分類： | ADC |
| 英文描述： | Triple 8-Bit Video ADC Three-State Outputs |
| 中文描述： | TRIPLE 1-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, PQFP44 |
| 封裝： | QFP-44 |
| 文件頁數： | 11/18頁 |
| 文件大小： | 273K |
| 代理商： | MC44251FU |
MC44251
MOTOROLA
11
Step Size Ideal:
Vrange
255
SSI
Differential Nonlinearity (DNL):
DNL(n)
VM(n
1)–VM(n)
SSI
–1 in LSB
Integral Nonlinearity (INL) and Offset:
Note: INL (min code) and INL (max code) is not defined.
Gain:
Gain = a in the formula Y = a
code + b
or the slope in the curve mid–points = f(code)
Voffset:
Voffset = b – Vmin
n+4
n+3
n+2
n+1
n
Y = a
code + b
MID–POINTS
OUTPUT
CODE
LEAST SQUARE
FIT LINE
Voffset
INL (n+5)
n+6
n+5
MID–POINT
VOLTAGE
Vmin
Figure 10. Integral Nonlinearity and Offset
DC INPUT VOLTAGE
OUTPUT CODE
MAX CODE*
MIN CODE*
1/GAIN = SLOPE
Vmin
Vmax
Vrange
* See dither generator.
LSB ideal = Vrange /255
(Min code = 0 or 1; see dither generator)
Figure 11.
INL(n)
VM(n)
a
·
n
b
SSI
in LSB
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