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參數(shù)資料
| 型號： | DS1721U+T&R |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Digital Thermometer and Thermostat |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 1Cel, SQUARE, SURFACE MOUNT |
| 封裝： | LEAD FREE, USOP-8 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大小： | 356K |
| 代理商： | DS1721U+T&R |
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FEATURES
§ Temperature measurements require no
external components with ±1°C accuracy
§ Measures temperatures from -55°C to
+125°C; Fahrenheit equivalent is -67°F to
+257°F
§ Temperature resolution is configurable from 9
to 12 (default) bits (0.5°C to 0.0625°C
resolution)
§ Maximum conversion time (9-bit resolution)
of 93.75 ms
§ Thermostatic settings are user-definable
§ Data is read/written via a 2-wire serial
interface (open drain I/O lines); 3-bit
addressability
§ Wide power supply range (2.7V - 5.5V)
§ Applications include personal computers,
cellular telephones, office equipment, or any
thermally sensitive system
§ 8-pin, 150-mil SOIC package and 8-pin SOP
package
PIN ASSIGNMENT
PIN DESCRIPTION
SDA
- 2-Wire Serial Data Input/Output
SCL
- 2-Wire Serial Clock
GND
- Ground
TOUT
- Thermostat Output Signal
A0
- Chip Address Input
A1
- Chip Address Input
A2
- Chip Address Input
VDD
- Power Supply Voltage (+5V)
DESCRIPTION
The DS1721 2-Wire Digital Thermometer and Thermostat provides 12-bit temperature readings, which
indicate the temperature of the device. Thermostatic settings and temperature readings are all
communicated to/from the DS1721 over a simple 2-wire serial interface. No additional components are
required; the device is truly a “temperature-to-digital” converter.
The DS1721 has three address bits that allow a user to multidrop up to eight sensors along the 2-wire bus,
greatly simplifying the bussing of distributed temperature sensing networks.
The thermal alarm output, TOUT, is active when the temperature of the device exceeds a user-defined
temperature TH. The output remains active until the temperature is equal to or below the user-defined
temperature TL, allowing for any hysteresis necessary. The active state of TOUT is configurable by the
user.
For applications that require faster conversion times, the user can adjust the readout resolution from 12 to
9 bits, effectively reducing the conversion time from 750ms (MAX) to 93.75 ms (MAX). This is
particularly useful in applications where temperature changes large magnitudes very rapidly.
Applications for DS1721 include personal computers/services, cellular telephones, office equipment, or
any microprocessor-based, thermally sensitive system.
DS1721
2-Wire Digital Thermometer
and Thermostat
www.maxim-ic.com
18
27
36
45
*
DS1721U
8-Pin -SOP
VDD
A0
A1
A2
SDA
SCL
TOUT
GND
1
8
2
7
3
6
4
5
DS1721S
8-Pin SOIC (150-mil)
SDA
SCL
TOUT
GND
VDD
A0
A1
A2
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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(fēng)格: 封裝 / 箱體: 設(shè)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(fēng)格: 封裝 / 箱體: 設(shè)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(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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