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參數(shù)資料
| 型號： | MB91F492PMC1-GE1 |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, FLASH, 50 MHz, RISC MICROCONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 48/60頁 |
| 文件大?。?/td> | 1628K |
| 代理商： | MB91F492PMC1-GE1 |
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MB91490 Series
52
DS07-16912-1E
External impedance and sampling time of analog inputs
The A/D converter is fitted with a sample and hold circuit. If the external impedance is so high that there is not
sufficient time for sampling, the internal sample and hold capacitor will not fully charge to the analog voltage,
and the precision of the A/D conversion will be adversely affected. Therefore, in order to satisfy the A/D
conversion precision specifications, either adjust the register values and operating frequency or reduce the
external impedance so that the sampling time is greater than the minimum value as given by the relationship
between external impedance and minimum sampling time. If you are still unable to hold enough sampling time,
connect a capacitor of about 0.1
μF to the analog input pin.
About errors
The relative error increases as the value of |AVRH2
AVSS| decreases.
R
C
Comparator
8/10-bit A/D converter
R
4.6 k
Ω
C
12.5 pF
Analog input circuit schematic
During sampling : ON
Analog input
Note : The values are reference values.
8/10-bit A/D converter
100
90
80
70
60
50
40
30
20
10
0
8/10-bit A/D converter
20
18
16
14
12
10
8
6
4
2
0
024
14
12
10
8
6
0
0.4
0.8
2.8
2.4
2.0
1.6
1.2
3.2
The relationship between the external impedance and minimum sampling time
(External impedance
= 0 kΩ to 100 kΩ)
(External impedance
= 0 kΩ to 20 kΩ)
External
impedance
[k
Ω
]
Minimum sampling time [
μs]
External
impedance
[k
Ω
]
Minimum sampling time [
μs]
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB91F492PMC-GE1 | 功能描述:IC MCU 256KB FLASH FR60 LFQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:FR MB91490 產(chǎn)品培訓(xùn)模塊:The Ultra-Low Power MSP430 MSP430 Overview MSP430 Design Tools MSP430 Peripherals MSP430x2xx/4xx and Wireless Overview Portable Medical Solutions with MSP430 MSP430 for Utility Metering Solutions MSP430: How to JTAG MSP430, How To Use the Clock System Grace Software Graphical User Interface MCU Overview Driver Library MSP430Ware Overview 標(biāo)準(zhǔn)包裝:1 系列:MSP430x4xx 核心處理器:RISC 芯體尺寸:16-位 速度:8MHz 連通性:SPI，UART/USART 外圍設(shè)備:欠壓檢測/復(fù)位，LCD，POR，PWM，WDT 輸入/輸出數(shù):48 程序存儲器容量:32KB（32K x 8 + 256B） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):1.8 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:100-LQFP 包裝:Digi-Reel® 其它名稱:296-26232-6 |
| MB91F585 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Motor Control MCU for Electric (EV) and Hybrid Electric Vehicles (HEV) |
| MB91F587 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Motor Control MCU for Electric (EV) and Hybrid Electric Vehicles (HEV) |
| MB91F591 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit MCU with Integrated Graphics Controller SoC |
| MB91F592 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit MCU with Integrated Graphics Controller SoC |
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