參數(shù)資料
型號: ATTINY44A-SSU
廠商: Atmel
文件頁數(shù): 118/135頁
文件大小: 0K
描述: IC MCU AVR 4K FLASH 20MHZ 14SOIC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
tinyAVR Introduction
標(biāo)準(zhǔn)包裝: 57
系列: AVR® ATtiny
核心處理器: AVR
芯體尺寸: 8-位
速度: 20MHz
連通性: USI
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,溫度傳感器,WDT
輸入/輸出數(shù): 12
程序存儲(chǔ)器容量: 4KB(2K x 16)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 14-SOIC(0.154",3.90mm 寬)
包裝: 管件
產(chǎn)品目錄頁面: 613 (CN2011-ZH PDF)
配用: ATSTK600-RC46-ND - STK600 ROUTING CARD AVR
ATSTK600-DIP40-ND - STK600 SOCKET/ADAPTER 40-PDIP
ATAVRISP2-ND - PROGRAMMER AVR IN SYSTEM
MB91470/480 Series
82
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
F to the analog input pin.
About errors
The relative error increases as the value of |AVRH
AVSS| decreases.
R
C
Comparator
8/10-bit A/D converter
12-bit A/D converter
R
4.6 k
1.0 k
C
12.5 pF
18.0 pF
Analog input circuit schematic
During sampling : ON
Analog input
Note : The values are reference values.
8/10-bit A/D converter
12-bit A/D converter
100
90
80
70
60
50
40
30
20
10
0
8/10-bit A/D converter
12-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 k to 100 k)
(External impedance
= 0 k to 20 k)
External
impedance
[k
]
Minimum sampling time [
s]
External
impedance
[k
]
Minimum sampling time [
s]
相關(guān)PDF資料
PDF描述
ATTINY24A-PU MCU AVR 2K FLASH 20MHZ 14PDIP
88910-011LF RAMPING MODULE W/SCREW
70295-001LF SHORT SINGLE GUIDE PIN
70295-004LF LONG DOUBLE METRAL GUIDE PIN
88914-013LF KEYING PIN WITH SCREW
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ATTINY44A-SSUR 功能描述:8位微控制器 -MCU 4KB FLSH 256B EE256B SRAM-20MHz, IND, 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
ATTINY44V 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
ATTINY44V-10MU 功能描述:8位微控制器 -MCU 4kB Flash 0.256kB EEPROM 12 I/O Pins 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
ATTINY44V-10MUR 功能描述:8位微控制器 -MCU 4KB FLSH 256B EE256B SRAM-10MHz, IND 1.8V 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
ATTINY44V-10PU 功能描述:8位微控制器 -MCU 4kB Flash 0.256kB EEPROM 12 I/O Pins 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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