參數(shù)資料
型號(hào)： DS1821S
廠商： DALLAS SEMICONDUCTOR
元件分類(lèi)： Switch/Digital Output Temperature Sensor
英文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 1Cel, RECTANGULAR, SURFACE MOUNT
封裝： 0.208 INCH, SOIC-8
文件頁(yè)數(shù)： 5/17頁(yè)
文件大?。?/td> 461K
代理商： DS1821S
DS1821
Page 13 of 17
RELATED APPLICATION NOTES
The following Application Notes pertain to the DS1821. These notes can be obtained from the Dallas
Semiconductor “Application Note Book,” via the Dallas website at http://www.dalsemi.com or through
our faxback service at (214) 450–0441.
Application Note 67: “Applying and Using the DS1620 in Temperature Control Applications”
Application Note 74: “Reading and Writing Touch Memories via Serial Interfaces”
Application Note 105: “High Resolution Temperature Measurement with Dallas Direct-to-Digital
Temperature Sensors”
Sample 1-wire subroutines that can be used in conjunction with AN74 can be downloaded from the
Dallas website or anonymous FTP Site.
DS1821 OPERATION EXAMPLE
In this example, the master device programs the DS1821 with TL = +10
°C and TH = +40°C and verifies
that the data has been saved correctly. The master then programs the status/configuration register so that
the device will power-up in thermostat mode (T/R
= 1) and the thermostat output will have active high
polarity (POL = 1).
MASTER
MODE
DATA (LSB
FIRST)
COMMENTS
TX
Reset
Master issues reset pulse.
RX
Presence
DS1821 responds with presence pulse.
TX
01h
Master issues Write TH command.
TX
28h
Master sends data for TH = +40°C.
TX
Reset
Master issues reset pulse.
RX
Presence
DS1821 responds with presence pulse.
TX
02h
Master issues Write TL command.
TX
0Ah
Master sends data for TL = +10°C.
TX
Reset
Master issues reset pulse.
RX
Presence
DS1821 responds with presence pulse.
TX
A1h
Master issues Read TH command.
RX
28h
Master reads stored TH value to verify data.
TX
Reset
Master issues reset pulse.
RX
Presence
DS1821 responds with presence pulse.
TX
A2h
Master issues Read TL command.
RX
0Ah
Master reads stored TL value to verify data.
TX
Reset
Master issues reset pulse.
RX
Presence
DS1821 responds with presence pulse.
TX
0Ch
Master issues Write Status command.
TX
06h
Master sends status/configuration data to the DS1821 with T/R
=
1 (thermostat mode at power-up) and POL = 1 (active high
thermostat output).
Power is cycled; DS1821 powers-up in thermostat mode.
相關(guān)PDF資料
PDF描述
DS1821 DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 1Cel, ROUND, SURFACE MOUNT
DS1821T DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), RECTANGULAR, THROUGH HOLE MOUNT
DS1822-PAR+T&R DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 2Cel, RECTANGULAR, THROUGH HOLE MOUNT
DS1822-PAR/T&R DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 2Cel, RECTANGULAR, THROUGH HOLE MOUNT
DS1822-PAR DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 0.20Cel, ROUND, THROUGH HOLE MOUNT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1821S/T&R 制造商:Maxim Integrated Products 功能描述:PROGRAM THERMOSTAT 208ML 8-SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER/STAT PROG 8-SOIC
DS1821S/T&R 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類(lèi)型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線(xiàn)接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
DS1821S/TR 制造商:DALLAS 制造商全稱(chēng):Dallas Semiconductor 功能描述:Programmable Digital Thermostat and Thermometer
DS1821S+ 功能描述:板上安裝溫度傳感器 Programmable Digital Thermostat/Thrmmtr RoHS:否 制造商:Omron Electronics 輸出類(lèi)型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線(xiàn)接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
DS1821S+R 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Programmable Digital Thermostat and Thermometer
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