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參數資料
型號: W83697HF
廠商: WINBOND ELECTRONICS CORP
元件分類: 外設及接口
英文描述: WINBOND I/O
中文描述: MULTIFUNCTION PERIPHERAL, PQFP128
封裝: PLASTIC, QFP-128
文件頁數: 94/167頁
文件大小: 1094K
代理商: W83697HF
W83697HF/F
Publication Release Date: Feb. 2002
- 85 - Revision 0.70
9.3 Analog Inputs
The maximum input voltage of the analog pin is 4.096V because the 8-bit ADC has a 16mv LSB. Really,
the application of the PC monitoring would most often be connected to power suppliers. The CPU V-core
voltage ,+3.3V ,battery and 5VSB voltage can directly connected to these analog inputs. The +12V,-12V
and -5V voltage inputs should be reduced a factor with external resistors so as to obtain the input range.
As Figure 9.2 shows.
Figure. 9.2
9.3.1
The input voltage +12VIN can be expressed as following equation.
Monitor over 4.096V voltage:
12
1
2
1
2
V IN
V
R
+
R
R
=
×
The value of R1 and R2 can be selected to 28K Ohms and 10K Ohms, respectively, when the input
voltage V1 is 12V. The node voltage of +12VIN can be subject to less than 4.096V for the maximun input
range of the 8bit ADC. The Pin 97 is connected to the power supply VCC with +5V. There are two
functions in this pin with 5V. The first function is to supply internal analog power in the W83697HF and
the second function is that this voltage with 5V is connected to internal serial resistors to monitor the
+5V voltage. The value of two serial resistors are 34K ohms and 50K ohms so that input voltage to ADC
is 2.98V which is less than 4.096V of ADC maximum input voltage. The express equation can represent
as follows.
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W83697 WINBOND I/O
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相關代理商/技術參數
參數描述
W83697HF_05 制造商:WINBOND 制造商全稱:Winbond 功能描述:LPC I/O
W83697HG 功能描述:IC LPC SUPER I/O 128-PQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標準包裝:3,000 系列:- 應用:PDA,便攜式音頻/視頻,智能電話 接口:I²C,2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應商設備封裝:24-QFN 裸露焊盤(4x4) 包裝:帶卷 (TR) 安裝類型:表面貼裝 產品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2
W83697SF 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O
W83697UF 制造商:WINBOND 制造商全稱:Winbond 功能描述:LPC I/O
W83697UG 功能描述:IC LPC SUPER I/O 128-PQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標準包裝:3,000 系列:- 應用:PDA,便攜式音頻/視頻,智能電話 接口:I²C,2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應商設備封裝:24-QFN 裸露焊盤(4x4) 包裝:帶卷 (TR) 安裝類型:表面貼裝 產品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2