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DS1722
DS1722 FUNCTIONAL BLOCK DIAGRAM Figure 1 
 
 
 
OPERATION-Measuring Temperature
The core of DS1722 functionality is its direct-to-digital temperature sensor. The DS1722 measures
temperature through the use of an on-chip temperature measurement technique with an operating range
from -55?to +120癈. The device powers up in a power-conserving shutdown mode. After power-up, the
DS1722 may be placed in a continuous conversion mode or in a one-shot conversion mode. In the
continuous conversion mode, the device continuously computes the temperature and stores the most
recent result in the temperature register at addresses 01h (LSB) and 02h (MSB). In the one-shot
conversion mode, the DS1722 performs one temperature conversion and then returns to the shutdown
mode, storing temperature in the temperature register. Details on how to change the setting after power-
up are contained in the OPERATION-Programming section.
 
 
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The resolution of the temperature conversion is configurable (8, 9, 10, 11, or 12 bits), with 9-bit readings
the default state. This equates to a temperature resolution of 1.0癈, 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 SPI or 3-wire interface with the address set to the
temperature register, 01h (LSB) and then 02h (MSB). Table 3 describes the exact relationship of output
data to measured temperature. The table assumes the DS1722 is configured for 12-bit resolution; if the
device is configured in a lower resolution mode, those bits will contain 0s. The data is transmitted
serially over the digital interface, MSb first for SPI communication and LSb first for 3-wire
communication. 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.
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DS1722S+ 功能描述:板上安装温度传感器 Digital Thermometer & Thermostat RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
DS1722S+T&R 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 3-WIRE/SPI 8SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER DIG 3-WIRE 8-SOIC
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DS1722U/T&R 制造商:Maxim Integrated Products 功能描述:THE MAXIM DS1722U/T&R IS A TEMPERATURE SENSOR. - Tape and Reel 制造商:Maxim Integrated Products 功能描述:Maxim DS1722U/T&R, Digital Thermometer and thermostat -55C to +125C 2.65V-5.5V 8-pin uMAX 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER DIG 3-WIRE 8-USOP
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