參數(shù)資料
型號: MB96F348CWBXXXPMC-GSE2
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 56 MHz, RISC MICROCONTROLLER, PQFP100
封裝: 14 X 14 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-100
文件頁數(shù): 5/118頁
文件大?。?/td> 1465K
代理商: MB96F348CWBXXXPMC-GSE2
MB96340 Series
Specication
78
FME/EMDC- 2007-9-12
MB96300_DS_el_adc.fm
PRELIMINARY
To satisfy the A/D conversion precision standard, consider the relationship between the external impedance and
minimum sampling time and either adjust the resistor value and operating frequency or decrease the external
impedance so that the sampling time (Tsamp) is longer than the minimum value. Usually, this value is set to 7
τ,
where
τ = RC. If you include the external input resistance (Rext) connected to the analog input, the sampling time
is expressed:
Tsamp [min] = 7.(Rext + R).C
If the sampling time cannot be sufcient, connect a capacitor of about 0.1 mF to the analog input pin.
About the error
The accuracy gets worse as |AVRH - AVRL| becomes smaller.
Analog input circuit model:
Comparator
Sampling switch
R
C
Analog input
Reference values:
R = 2.6 k
(Max)
C = 8.5 pF (Max)
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