參數(shù)資料
型號(hào): MB96F345DSPQC-GSE2
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 56 MHz, MICROCONTROLLER, PQFP100
封裝: 20 X 14 MM, 3.35 MM HEIGHT, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁數(shù): 113/116頁
文件大?。?/td> 3360K
代理商: MB96F345DSPQC-GSE2
MB96340 Series
96
FME-MB96340 rev 9
Notes on A/D Converter Section
About the external impedance of the analog input and the sampling time of the A/D converter (with sample
and hold circuit):
If the external impedance is too high to keep sufcient sampling time, the analog voltage charged to the
internal sample and hold capacitor is insufcient, adversely affecting A/D conversion precision.
3FF
3FE
3FD
004
003
002
001
AVRL
AVRH
AVRL
AVRH
N
+ 1
N
1
N
2
VOT (actual measurement value)
{1 LSB
× (N 1)
+ VOT }
Actual conversion
characteristics
VFST (actual
measurement
value)
VNT (actual
measurement value)
Actual conversion
characteristics
Ideal characteristics
Actual conversion
characteristics
Actual conversion
characteristics
Ideal
characteristics
Digital
output
Digital
output
Analog input
VNT
(actual measurement value)
V (N + 1) T
(actual measurement
value)
Nonlinearity error
Differential nonlinearity error
Differential nonlinearity error of digital output N
=
1 LSB
=
analog input circuit model:
Comparator
Sampling switch
R
C
Analog input
Reference value:
C = 8.5 pF (Max)
Nonlinearity error of digital output N
=
VNT
{1 LSB × (N 1) + VOT}
1 LSB
[LSB]
V (N+1) T
VNT
1 LSB
1 LSB [LSB]
VFST
VOT
1022
[V]
N
: A/D converter digital output value
VOT : Voltage at which digital output transits from “000H” to “001H.”
VFST : Voltage at which digital output transits from “3FEH” to “3FFH.”
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