參數(shù)資料
型號: MB96F348RSBPQC-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: 14 X 20 MM, 3.35 MM HEIGHT, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁數(shù): 112/116頁
文件大?。?/td> 2465K
代理商: MB96F348RSBPQC-GSE2
MB96340 Series
DS07-13802-3E
95
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 sufficient sampling time, the analog voltage charged to the
internal sample and hold capacitor is insufficient, adversely affecting A/D conversion precision.
To satisfy the A/D conversion precision standard, the relationship between the external impedance and minimum
sampling time must be considered and then either the resistor value and operating frequency must be adjusted
or the external impedance must be decreased so that the sampling time (Tsamp) is longer than the minimum value.
Usually, this value is set to 7
τ, where τ = RC. If the external input resistance (Rext) connected to the analog input
is included, the sampling time is expressed as follows:
Tsamp [min] = 7
× (Rext + 2.6kΩ) × C for 4.5 ≤ AVcc ≤ 5.5
Tsamp [min] = 7
× (Rext + 12.1kΩ) × C for 3.0 ≤ AVcc ≤ 4.5
If the sampling time cannot be sufficient, connect a capacitor of about 0.1
μF 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 value:
C = 8.5 pF (Max)
相關(guān)PDF資料
PDF描述
MB9BF504NAPMC 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP100
MB9BF505NABGL 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PBGA112
MB9BF506NABGL 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PBGA112
MB9BF506NAPMC 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP100
MBC13900NT1 L BAND, Si, NPN, RF SMALL SIGNAL TRANSISTOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB96F348RWA 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller
MB96F348RWAPMC-GE2 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller
MB96F348RWAPQC-GE2 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller
MB96F348TSAPMC-GE2 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller
MB96F348TSAPQC-GE2 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller