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參數(shù)資料
| 型號： | DS1721U+T&R |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 4/17頁 |
| 文件大?。?/td> | 257K |
| 描述： | IC THERMOMETER/STAT DIG HP 8USOP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 3,000 |
| 功能： | 溫度計，恒溫計 |
| 傳感器類型： | 內(nèi)部 |
| 感應溫度： | -55°C ~ 125°C |
| 精確度： | ±2°C（最小值） |
| 拓撲： | ADC，比較器，寄存器庫 |
| 輸出類型： | 2 線串行，I²C?/SMBUS? |
| 輸出警報： | 是 |
| 輸出風扇： | 是 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
DS1721
4 of 17
OPERATION-Measuring Temperature
The core of DS1721 functionality is its direct-to-digital temperature sensor. The DS1721 measures
temperature through the use of an on-chip temperature measurement technique with an operation range
from -55癈 to +125癈. The device can be configured to perform continuous conversions with the most
recent result being stored in the thermometer register. The device can also be configured to perform a
single conversion, store the result, and return to a standby mode. Regardless of the mode used, the digital
temperature is retrieved from the temperature register using the Read Temperature (AAh) command, as
described in detail in the Command Set section. The DS1721 power-up default has the sensor set to
automatically perform 12-bit conversions continuously once the Start Convert T (51h) command is
issued. Details on how to change the settings after power-up are contained in the OPERATION-
Programming section.
The resolution of the temperature conversion can be configured as 9, 10, 11, or 12 bits, with 12-bit
readings as the default state. This equates to a temperature resolution of 0.5癈, 0.25癈, 0.125癈, or
0.0625癈. Following each conversion thermal data is stored in the thermometer register in twos
complement format; the information can be retrieved over the 2-wire interface by issuing a Read
Temperature (AAh) command. Table 2 describes the exact relationship of output data to measured
temperature. The table assumes the DS1721 is configured for 12-bit resolution; if the device is configured
in a lower resolution mode, insignificant bits will contain zeros. The data is transmitted serially over the
2-wire serial interface, MSb first. The MSb of the temperature register contains the sign (S) bit,
denoting whether the temperature is positive or negative. For Fahrenheit usage, a lookup table or
conversion routine must be used.
TEMPERATURE/DATA RELATIONSHIPS Table 2
S
2
6
2
5
2
4
2
3
2
2
2
1
2
0
MSB
MSb
(UNIT = 癈)
LSb
2
-1
2
-2
2
-3
2
-4
0
0
0
0
LSB
TEMP
DIGITAL OUTPUT
(Binary)
DIGITAL OUTPUT
(Hex)
+125癈
0111 1101 0000 0000
7D00h
+25.0625癈
0001 1001 0001 0000
1910h
+10.125癈
0000 1010 0010 0000
0A20h
+0.5癈
0000 0000 1000 0000
0080h
+0癈
0000 0000 0000 0000
0000h
-0.5癈
1111 1111 1000 0000
FF80h
-10.125癈
1111 0101 1110 0000
F5E0h
-25.0625癈
1110 0110 1111 0000
E6F0h
-55癈
1100 1001 0000 0000
C900h
OPERATION-Thermostat Control
In its operating mode, the DS1721 functions as a thermostat with programmable hysteresis, as shown in
Figure 2. The thermostat output updates as soon as a temperature conversion is complete. When the
DS1721s temperature meets or exceeds the value stored in the high temperature trip register (TH), the
output becomes active, and will stay active until the temperature is equal to or below the temperature
stored in the low temperature trigger register (TL). In this way, any amount of hysteresis may be
obtained.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1722 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Digital Thermometer with SPI/3-Wire Interface |
| DS1722S | 功能描述:板上安裝溫度傳感器 Digital Thermometer & Thermostat RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口: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: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| DS1722S/T&R | 制造商:Maxim Integrated Products 功能描述:SPI 3-WIRE THERMOMETER SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER DIG 3-WIRE 8-SOIC |
| DS1722S/T&R | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口: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: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| DS1722S+ | 功能描述:板上安裝溫度傳感器 Digital Thermometer & Thermostat RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口: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: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
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