參數(shù)資料
型號: PIC16F716-I/P
廠商: Microchip Technology
文件頁數(shù): 77/136頁
文件大?。?/td> 0K
描述: IC PIC MCU FLASH 2KX14 18DIP
產(chǎn)品培訓模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標準包裝: 25
系列: PIC® 16F
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): 13
程序存儲器容量: 3.5KB(2K x 14)
程序存儲器類型: 閃存
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉換器: A/D 4x8b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 18-DIP(0.300",7.62mm)
包裝: 管件
產(chǎn)品目錄頁面: 639 (CN2011-ZH PDF)
配用: I3-DB16F716-ND - BOARD DAUGHTER ICEPIC3
AC162054-ND - HEADER INTERFACE ICD2 16F716
ACICE0202-ND - ADAPTER MPLABICE 18P 300 MIL
AC164010-ND - MODULE SKT PROMATEII DIP/SOIC
2007 Microchip Technology Inc.
DS41206B-page 43
PIC16F716
7.3
A/D Acquisition Requirements
For the ADC to meet its specified accuracy, the charge
holding capacitor (CHOLD) must be allowed to fully
charge to the input channel voltage level. The Analog
Input model is shown in Figure 7-2. The source
impedance (RS) and the internal sampling switch (RSS)
impedance directly affect the time required to charge the
capacitor CHOLD. The sampling switch (RSS) impedance
varies over the device voltage (VDD), see Figure 7-2.
The maximum recommended impedance for analog
sources is 10 k
Ω. As the source impedance is
decreased, the acquisition time may be decreased.
After the analog input channel is selected (or changed),
an A/D acquisition must be done before the conversion
can be started. To calculate the minimum acquisition
time, Equation 7-1 may be used. This equation
assumes that 1/2 LSb error is used. The 1/2 LSb error is
the maximum error allowed for the ADC to meet its
specified resolution.
EQUATION 7-1:
ACQUISITION TIME EXAMPLE
TACQ
Amplifier Settling Time
Hold Capacitor Charging Time
Temperature Coefficient
++
=
TAMP
TC
TCOFF
++
=
2μsTC
Temperature - 25°C
() 0.05μs/°C
()
[]
++
=
TC
CHOLD RIC
RSS
RS
++
() ln(1/2047)
=
10pF 1k
Ω 7kΩ 10kΩ
++
()
ln(0.0004885)
=
1.37
=
μs
TACQ
S
1.37μS
50°C- 25°C
() 0.05μS/°C
()
[]
++
=
4.67μS
=
VAPPLIED 1e
Tc
RC
---------
VAPPLIED 1
1
2047
------------
=
VAPPLIED 1
1
2047
------------
VCHOLD
=
VAPPLIED 1e
TC
RC
----------
VCHOLD
=
;[1] VCHOLD charged to within 1/2 lsb
;[2] VCHOLD charge response to VAPPLIED
;combining [1] and [2]
The value for TC can be approximated with the following equations:
Solving for TC:
Therefore:
Temperature
50°C and external impedance of 10k
Ω 5.0V VDD
=
Assumptions:
Note 1: The reference voltage (VREF) has no effect on the equation, since it cancels itself out.
2: The charge holding capacitor (CHOLD) is not discharged after each conversion.
3: The maximum recommended impedance for analog sources is 10 k
Ω. This is required to meet the pin
leakage specification.
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PIC16F716T-E/SO 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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PIC16F716T-I/ML 制造商:Microchip Technology Inc 功能描述:MCU 8BIT RISC 28KB FLASH 2.5V/ - Tape and Reel
PIC16F716T-I/SO 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F716T-I/SS 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT