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DS1721U/T,R PDF预览

DS1721U/T,R

更新时间: 2024-02-01 10:10:09
品牌 Logo 应用领域
美信 - MAXIM 监控
页数 文件大小 规格书
17页 269K
描述
2-Wire Digital Thermometer and Thermostat

DS1721U/T,R 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active包装说明:TSSOP8,.19
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:6 weeks
风险等级:1.36最大精度(摄氏度):1 Cel
主体宽度:3 mm主体高度:1.1 mm
主体长度或直径:3 mm外壳:PLASTIC
JESD-609代码:e3安装特点:SURFACE MOUNT
位数:12端子数量:8
最大工作电流:1.25 mA最高工作温度:125 °C
最低工作温度:-55 °C输出接口类型:2-WIRE INTERFACE
封装主体材料:PLASTIC/EPOXY封装等效代码:TSSOP8,.19
封装形状/形式:SQUARE电源:3/5 V
传感器/换能器类型:TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL子类别:Other Sensors
最大供电电压:5.5 V最小供电电压:2.7 V
表面贴装:YES端子面层:Matte Tin (Sn)
端接类型:SOLDERBase Number Matches:1

DS1721U/T,R 数据手册

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DS1721  
2-Wire Digital Thermometer  
and Thermostat  
www.maxim-ic.com  
FEATURES  
PIN ASSIGNMENT  
CꢀTemperature measurements require no  
external components with ±1°C accuracy  
CꢀMeasures temperatures from -55°C to  
+125°C; Fahrenheit equivalent is -67°F to  
+257°F  
SDA  
VDD  
1
2
3
4
8
7
6
5
*
1
8
7
VDD  
A0  
A1  
SDA  
SCL  
TOUT  
GND  
SCL  
TOUT  
A0  
A1  
A2  
2
3
4
6
5
CꢀTemperature resolution is configurable from 9  
to 12 (default) bits (0.5°C to 0.0625°C  
resolution)  
GND  
A2  
DS1721U  
DS1721S  
8-Pin SOIC (150-mil)  
8-Pin µ-SOP  
CꢀMaximum conversion time (9-bit resolution)  
of 93.75 ms  
PIN DESCRIPTION  
CꢀThermostatic settings are user-definable  
CꢀData is read/written via a 2-wire serial  
interface (open drain I/O lines); 3-bit  
addressability  
SDA  
SCL  
GND  
TOUT  
A0  
- 2-Wire Serial Data Input/Output  
- 2-Wire Serial Clock  
- Ground  
- Thermostat Output Signal  
- Chip Address Input  
CꢀWide power supply range (2.7V - 5.5V)  
CꢀApplications include personal computers,  
cellular telephones, office equipment, or any  
thermally sensitive system  
A1  
- Chip Address Input  
A2  
- Chip Address Input  
VDD  
- Power Supply Voltage (+5V)  
Cꢀ8-pin, 150-mil SOIC package and 8-pin µSOP  
package  
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.  
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