General Description

The MAX31826 digital thermometer provides 12-bit temperature measurements and communicates over a 1-WireM bus that by definition requires only one data line (and ground) for communication with a central microcontroller. It has a -55NC to +125NC operating temperature range and is accurate to Q0.5NC over the -10NC to +85NC range. In addition, the device can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply.

Benefits and Features

♦ Unique 1-Wire Interface Requires Only One Port Pin for Communication

♦ Integrated Temperature Sensor and EEPROM Reduce Component Count

    ◇ Measures Temperatures from -55NC to +125NC (-67NF to +257NF)

    ◇ ±0.5NC Accuracy from -10NC to +85NC

    ◇ 12-Bit Temperature Resolution (0.0625NC)

    ◇ 1Kb EEPROM Can Be Locked to Prevent Further Writes

♦ Multidrop Capability Simplifies Multisensor Systems

    ◇ Each Device Has a Unique 64-Bit Serial Code Stored in On-Board ROM

    ◇ Four Pin-Programmable Bits to Uniquely Identify Up to 16 Sensor Locations on a Bus

♦ Can Be Powered from Data Line (3.0V to 3.7V Power-Supply Range)

♦ 8-Pin µMAX® Package

Applications

    Industrial Systems

    Building Automation

    Consumer Equipment

    System Calibration

    Module Identification