參數(shù)資料
型號： PIC18F4553
廠商： Microchip Technology Inc.
英文描述： 28/40/44-Pin High-Performance, Enhanced Flash, USB Microcontrollers with 12-Bit A/D and nanoWatt Technology
中文描述： 28/40/44-Pin高性能，增強型閃存，USB微控制器與12位A / D和納瓦技術(shù)
文件頁數(shù)： 36/46頁
文件大小： 607K
代理商： PIC18F4553
PIC18F2458/2553/4458/4553
DS39887B-page 34
Preliminary
2007 Microchip Technology Inc.
FIGURE 4-3:
A/D CONVERSION TIMING
TABLE 4-2:
A/D CONVERSION REQUIREMENTS
131
130
132
BSF ADCON0, GO
Q4
A/D CLK
(1)
A/D DATA
ADRES
ADIF
GO
SAMPLE
OLD_DATA
SAMPLING STOPPED
DONE
NEW_DATA
(Note 2)
11
10
9
3
2
1
Note
1:
If the A/D clock source is selected as RC, a time of T
CY
is added before the A/D clock starts.
This allows the
SLEEP
instruction to be executed.
This is a minimal RC delay (typically 100 ns), which also disconnects the holding capacitor from the analog input.
2:
. . .
. . .
T
CY
0
Param
No.
Symbol
Characteristic
Min
Max
Units
Conditions
130
T
AD
A/D Clock Period
PIC18
F
XXXX
PIC18
LF
XXXX
0.8
1.4
12.5
(1)
25.0
(1)
μ
s
μ
s
T
OSC
based, V
REF
≥
3.0V
V
DD
= 3.0V;
T
OSC
based, V
REF
full range
A/D RC mode
V
DD
= 3.0V; A/D RC mode
PIC18
F
XXXX
PIC18
LF
XXXX
—
—
13
1
3
μ
s
μ
s
T
AD
131
T
CNV
Conversion Time
(not including acquisition time)
(2)
Acquisition Time
(3)
Switching Time from Convert
→
Sample
Discharge Time
The time of the A/D clock period is dependent on the device frequency and the T
AD
clock divider.
ADRES registers may be read on the following T
CY
cycle.
The time for the holding capacitor to acquire the “New” input voltage when the voltage changes full scale
after the conversion (V
DD
to V
SS
or V
SS
to V
DD
). The source impedance (R
S
) on the input channels is 50
Ω
.
On the following cycle of the device clock.
14
132
135
137
Note 1:
T
ACQ
T
SWC
T
DIS
1.4
—
0.2
—
μ
s
(Note 4)
—
μ
s
2:
3:
4:
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC18F4553-I/ML 功能描述:8位微控制器 -MCU 32KB FLSH 2048 RAM FSUSB 2.0 12B ADC 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(fēng)格:SMD/SMT
PIC18F4553-I/P 功能描述:8位微控制器 -MCU 32KB FLSH 2048 RAM FSUSB 2.0 12B ADC 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(fēng)格:SMD/SMT
PIC18F4553-I/P 制造商:Microchip Technology Inc 功能描述:8-Bit Microcontroller IC
PIC18F4553-I/PT 功能描述:8位微控制器 -MCU 32KB FLSH 2048 RAM FSUSB 2.0 12B ADC 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(fēng)格:SMD/SMT
PIC18F4553T-I/ML 功能描述:8位微控制器 -MCU 32KB FLSH 2048 RAM FSUSB 2.0 12B ADC 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(fēng)格:SMD/SMT
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