DS1822-PAR

所属类别：传感器
产品名称：超过-10°C至+85°C温度范围内具有±2°C精度的数字温度计
厂商：MAXIM
生产批号：11+
封装：SOP8
库存状态：有库存
库存量：8000
最低订购量：1
详细资料：

Product Introduction

DS1822 Digital thermometer with ±2°C accuracy over the temperature range of -10°C to +85°C

Applications/Uses:

Fire alarm system
Hard drives
Storage area network (SAN)
telecommunications

description

The DS1822 is a digital thermometer with ±2°C accuracy over the temperature range of -10°C to +85°C. Data in 1-Wire® serial bus with a resolution of 9 to 12 bits (user programmable) in a complement format of more than 2 is read out.

The DS1822's temperature (T H) and temperature (T L) are stored in the on-chip EEPROM with user-programmable setpoints that provide thermostatic capability. An internal flag is set to measure the temperature as T H greater than or less than T L. If thermostatic operation is not required, the two bytes in the EEPROM are reserved as T H and T L for general-purpose non-volatile storage.

The serial number of each DS1822's function, unique and immutable 64-bit chip, serves as the bus address of the sensor. This allows multiple DS1822 devices to coexist on the same 1-Wire bus. The DS1822 can be powered locally from a 3.0V to 5.5V supply with power derived from a 1-Wire data cable ("parasitic power supply").

The DS1822 is available as a 3-pin TO-92 (DS1822) and 150 mil 8-pin SO (DS1822Z) packages. In addition, the parasite power version of DS1822 is available for DS1822, performance appraisal. High-precision DS18B20 is also available, providing accuracy ±0.5°C and software compatibility with DS1822.

Key features:

±2°C accuracy from -10°C to +85°C
Measurement temperature from -55°C to +125°C (-67°F to +257°F -)
9 - 12 user configurable resolutions
1-Wire interface, only one communication port pin is required
There is a 64-bit unique and immutable electronic serial number
Multi-drop capability simplifies distributed temperature sensing
User-defined non-volatile alarms set alarm functions
Conversion temperature to 12 bits, digital words at 750ms (maximum)
The required temperature measurement requires no external components
3.0V to 5.5V supply voltage range
Optional "parasitic power" operation (power supply from 1-Wire bus direct)
3-pin TO-92 (DS1822) and 8-pin SO (DS1822Z) packages of 150 mil

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