參數(shù)資料
型號: PIC12F683T-E/SN
廠商: Microchip Technology
文件頁數(shù): 127/176頁
文件大?。?/td> 0K
描述: IC MCU FLASH 2KX14 8SOIC
產(chǎn)品培訓模塊: Asynchronous Stimulus
Digi-Key 應用說明: AN0005 PWM Example with Microchip's CCP Module
AN0005 Example Code
標準包裝: 3,300
系列: PIC® 12F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數(shù): 5
程序存儲器容量: 3.5KB(2K x 14)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
包裝: 帶卷 (TR)
配用: AC162058-ND - HEADER MPLAB ICD2 FOR PIC12F683
I3-DB12F683-ND - BOARD DAUGHTER ICEPIC3
PIC12F683
DS41211D-page 52
2007 Microchip Technology Inc.
8.2
Analog Input Connection
Considerations
A simplified circuit for an analog input is shown in
Figure 8-3. Since the analog input pins share their con-
nection with a digital input, they have reverse biased
ESD protection diodes to VDD and VSS. The analog
input, therefore, must be between VSS and VDD. If the
input voltage deviates from this range by more than
0.6V in either direction, one of the diodes is forward
biased and a latch-up may occur.
A maximum source impedance of 10 k
Ω is recommended
for the analog sources. Also, any external component
connected to an analog input pin, such as a capacitor or
a Zener diode, should have very little leakage current to
minimize inaccuracies introduced.
FIGURE 8-3:
ANALOG INPUT MODEL
Note 1: When reading a PORT register, all pins
configured as analog inputs will read as a
‘0’. Pins configured as digital inputs will
convert as an analog input, according to
the input specification.
2: Analog levels on any pin defined as a
digital input, may cause the input buffer to
consume more current than is specified.
VA
Rs < 10K
CPIN
5 pF
VDD
VT
≈ 0.6V
VT
≈ 0.6V
RIC
ILEAKAGE
±500 nA
Vss
AIN
Legend: CPIN
= Input Capacitance
ILEAKAGE = Leakage Current at the pin due to various junctions
RIC
= Interconnect Resistance
RS
= Source Impedance
VA
= Analog Voltage
VT
= Threshold Voltage
To ADC Input
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