Datasheet > 传感器/换能器 > 温度传感器> DS1721S/T&R

DS1721S/T&R

更新时间： 2024-01-26 23:51:21

品牌	Logo	应用领域
美信 - MAXIM		传感器换能器输出元件监控
页数	文件大小	规格书
17页	269K
描述
Serial Switch/Digital Sensor, 12 Bit(s), 1Cel, Rectangular, 8 Pin, Surface Mount, 0.150 INCH, SOIC-8

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

DS1721S/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：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory 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：	SOLDER	Base Number Matches：	1

DS1721S/T&R 数据手册

DS1721

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°C to +125°C. 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°C, 0.25°C, 0.125°C, or

0.0625°C. Following each conversion thermal data is stored in the thermometer register in two’s

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

2⁶

2⁵

2⁴

2³

2²

2¹

2⁰

LSb

MSB

LSB

MSb

2^-1

(UNIT = °C)

2^-2

2^-3

2^-4

TEMP

DIGITAL OUTPUT

(Binary)

DIGITAL OUTPUT

(Hex)

+125°C

+25.0625°C

+10.125°C

+0.5°C

+0°C

-0.5°C

-10.125°C

-25.0625°C

-55°C

0111 1101 0000 0000

0001 1001 0001 0000

0000 1010 0010 0000

0000 0000 1000 0000

0000 0000 0000 0000

1111 1111 1000 0000

1111 0101 1110 0000

1110 0110 1111 0000

1100 1001 0000 0000

7D00h

1910h

0A20h

0080h

0000h

FF80h

F5E0h

E6F0h

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

DS1721’s 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.

4 of 17

1 2 345 6 7...17

下载PDF

与DS1721S/T&R相关器件

型号	品牌	描述	获取价格	数据表
DS1721S/T&R+W	MAXIM	Serial Switch/Digital Sensor,	获取价格
DS1721S/T,R	MAXIM	2-Wire Digital Thermometer and Thermostat	获取价格
DS1721S+	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 1Cel, Rectangular, 8 Pin, Surface Mount, 0.150 IN	获取价格
DS1721S-T,R	MAXIM	2-Wire Digital Thermometer and Thermostat	获取价格
DS1721U	MAXIM	2-Wire Digital Thermometer and Thermostat	获取价格
DS1721U/T&R+W	MAXIM	暂无描述	获取价格

与DS1721S/T&R相关文章

玻璃管保险丝与陶瓷管保险丝：区别与替代性探讨
2024-05-22

1
PCF8574资料解读：主要参数分析、引脚说明
2024-05-21

10
AD637数据手册解读：主要特性、引脚及其功能解读、电气参数
2024-05-21

9
ADUM1201资料手册解读：参数分析、引脚说明、应用分析
2024-05-21

12

产品中心

服务支持

精选活动

关于我们

帮助中心

DS1721S/T&R

DS1721S/T&R 技术参数

DS1721S/T&R 数据手册

与DS1721S/T&R相关器件

与DS1721S/T&R相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

DS1721S/T&R

DS1721S/T&R 技术参数

DS1721S/T&R 数据手册

与DS1721S/T&R相关器件

与DS1721S/T&R相关文章

您还可以找

您在本页遇到什么问题？