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參數(shù)資料
| 型號： | MB90V520 |
| 廠商： | Fujitsu Limited |
| 英文描述： | 16-bit Proprietary Microcontroller |
| 中文描述： | 16位微控制器專有 |
| 文件頁數(shù)： | 97/106頁 |
| 文件大?。?/td> | 1539K |
| 代理商： | MB90V520 |
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MB90520 Series
97
(Continued)
7. Notes for A/D Conversion
Analog inputs should have external circuit impedance of approximately 5 k
or less.
External capacitance, if used, should be several thousand times the level of the chip’s internal capacitance in
consideration of the effects of partial potential between the external and internal capacitance.
If the impedance of the external circuit is too high, the analog voltage sampling interval may be insufficient (using
a sampling interval of 4.00
μ
s and a machine clock frequency of 16 MHz).
Error
The smaller | AVRH – AVRL | is, the greater the error is.
Linearity error
N + 1
N
N – 1
N – 2
3FF
3FE
3FD
004
003
002
001
Analog input
AVRL
AVRH
Analog input
AVRL
AVRH
Actual conversion
characteristics
V
OT
(mesured value)
V
(measured value)
Actual conversion
characteristics
V
{1 LSB
×
(N – 1)
+ V
OT
}
Theoretical
characteristics
D
D
Differential linearity error
Theoretical
characteristics
V
(measured value)
Actual conversion
characteristics
V
NT
(measured value)
Actual conversion
characteristics
Linearity error of
digital output N
V
OT
: Voltage at transition of digital output from “000
H
” to “001
H
”
V
FST
: Voltage at transition of digital output from “3FE
H
” to “3FF
H
”
[LSB]
V
NT
– {1 LSB
×
(N – 1) + V
OT
}
1 LSB
V
(N + 1)T
– V
NT
1 LSB
=
[V]
V
FST
– V
OT
1022
=
1 LSB
– 1 LSB [LSB]
=
Differential linearity error
of digital N
(measured value)
Block diagram of analog input circuit model
Note: Listed values must be considered standards.
Comparator
Analog input
C
MB90522, MB90523
R
ON
: Approx. 1.5 k
C:
Approx. 30 pF
MB90F523
R
ON
: Approx. 3.0 k
C:
Approx. 65 pF
R
ON
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PDF描述 |
|---|---|
| MB90522 | 36-Bit Bus Transceivers With 3-State Outputs 100-LQFP -55 to 125 |
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| MB90522PFV | Quadruple 2-Input Positive-NAND Gates 14-CFP -55 to 125 |
| MB90523 | Quadruple 2-Input Positive-NAND Gates 20-LCCC -55 to 125 |
| MB90523PFF | 16-bit Proprietary Microcontroller |
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