參數(shù)資料
型號(hào): MB95F128JBPF-GE1
廠商: Fujitsu Semiconductor America Inc
文件頁數(shù): 61/80頁
文件大?。?/td> 0K
描述: IC MCU 60KB FLASH 100QFP
標(biāo)準(zhǔn)包裝: 1
系列: F²MC MB95120MB
核心處理器: F²MC-8FX
芯體尺寸: 8-位
速度: 16MHz
連通性: I²C,LIN,SIO,UART/USART
外圍設(shè)備: LCD,LVD,POR,PWM,WDT
輸入/輸出數(shù): 87
程序存儲(chǔ)器容量: 60KB(60K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.4 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 12x8/10b
振蕩器型: 外部
工作溫度: -40°C ~ 105°C
封裝/外殼: 100-QFP
包裝: 托盤
其它名稱: 865-1074
MB95120MB Series
64
(2) Notes on Using A/D Converter
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. Therefore to satisfy the A/D conversion precision standard, consider the relationship
between the external impedance and minimum sampling time and either adjust the register value and operating
frequency or decrease the external impedance so that the sampling time is longer than the minimum value. Also,
if the sampling time cannot be sufficient, connect a capacitor of about 0.1
F to the analog input pin.
About errors
As |AVCC
AVSS| becomes smaller, values of relative errors grow larger.
R
C
Analog input
Note : The values are reference values.
Analog input equivalent circuit
RC
4.5 V
≤ AVcc ≤ 5.5 V
2.0 k
(Max)
16 pF (Max)
4.0 V
≤ AVcc < 4.5 V
8.2 k
(Max)
16 pF (Max)
Comparator
During sampling : ON
0
2
46
8
10
12
14
0
10
20
30
40
50
60
70
80
90
100
AVCC
≥ 4.5 V
AVCC
≥ 4.0 V
01
23
4
0
2
4
6
8
10
12
14
16
18
20
AVCC
≥ 4.5 V
AVCC
≥ 4.0 V
(External impedance
= 0 k to 100 k)
(External impedance
= 0 k to 20 k)
Minimum sampling time [
s]
External
impedance
[k
]
Minimum sampling time [
s]
External
impedance
[k
]
The relationship between external impedance and minimum sampling time
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