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參數(shù)資料
| 型號(hào)： | DS1721S |
| 元件分類： | 溫度傳感器 |
| 英文描述： | Digital Thermometer |
| 中文描述： | 數(shù)字溫度計(jì) |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 263K |
| 代理商： | DS1721S |
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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 150 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 μSOP
package
PIN ASSIGNMENT
PIN DESCRIPTION
SDA
SCL
GND
T
OUT
A
0
A
1
A
2
V
DD
- 2-Wire Serial Data Input/Output
- 2-Wire Serial Clock
- Ground
- Thermostat Output Signal
- Chip Address Input
- Chip Address Input
- Chip Address Input
- 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, T
OUT
, 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 T
OUT
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 1.2 s (MAX) to 150 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.dalsemi.com
1
8
2
7
3
4
6
5
*
DS1721U
8-PIN μ-SOP
V
DD
A
0
A
1
A
2
SDA
SCL
T
OUT
GND
1 8
2 7
3 6
4 5
DS1721S
8-Pin SOIC (150-mil)
SDA
SCL
T
OUT
GND
V
DD
A
0
A
1
A
2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1721S/T&R | 制造商:Maxim Integrated Products 功能描述:2-WIRE DIGITAL THERMOMETER SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER/STAT DIG HP 8SOIC |
| DS1721S/T&R+W | 制造商:Maxim Integrated Products 功能描述:DIGITAL THERMOMETER AND THERMOSTAT - Tape and Reel |
| DS1721S/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(zhǔn)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 |
| DS1721S/T,R | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:2-Wire Digital Thermometer and Thermostat |
| DS1721S+ | 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(zhǔn)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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