參數(shù)資料
型號: MB91F467MAPMC-GSE1
廠商: FUJITSU LTD
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP216
封裝: 24 X 24 MM, 1.70 MM HEIGHT, 0.40 MM PITCH, LEAD FREE, PLASTIC, QFP-216
文件頁數(shù): 127/128頁
文件大?。?/td> 3125K
代理商: MB91F467MAPMC-GSE1
MB91460M Series
98
DS07-16613-2E
Note:
< About the external impedance of analog input and its sampling time >
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, consider the relationship between the external impedance and
minimum sampling time and either adjust the operating frequency or decrease the external impedance so that
the sampling time is longer than the minimum value.
<Countermeasure for noise which generates on reference power supply>
We recommend to put some
μF of bypass capacitor into the reference power supply (AVRH pin).
<About errors>
As |AVRH-AVSS| becomes smaller, values of relative errors grow larger.
<Other>
When inserting a capacitor for blocking direct current between an external circuit and an input pin, set the
capacitance value to approximately some thousand times of CSH in order to suppress any influence by the
voltage divided depending on chip's internal sampling capacitance CSH.
R
C
Analog input circuit model
During sampling:ON
Note: The values are reference values.
Analog input
Comparator
R
C
12.1 k
Ω (max) 8.5 pF(max)
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