The DS1631, DS1631A, and DS1731 digital thermometers provide 9, 10, 11, or 12-bit temperature readings over a -55°C to +125°C range. The DS1631 and DS1631A thermometer accuracy is ±0.5°C from 0°C to +70°C with 3.0V ≤ VDD ≤ 5.5V, and the DS1731 accuracy is ±1°C from -10°C to +85°C with 3.0V ≤ VDD ≤ 5.5V. The thermostat on all three devices provides custom hysteresis with user-defined trip points (TH and TL). The TH and TL registers and thermometer configuration settings are stored in NV EEPROM so they can be programmed prior to installation. In addition, the DS1631A automatically begins taking temperature measurements at power-up, which allows it to function as a stand-alone thermostat. Communication with the DS1631/DS1631A/DS1731 is achieved through a 2-wire serial interface, and three address pins allow up to eight devices to be multidropped on the same 2-wire bus.
Key Features
Applications/Uses
DS1631 and DS1631A Provide ±0.5°C Accuracy over a 0°C to +70°C Range
DS1731 Provides ±1°C Accuracy over a -10°C to +85°C Range
DS1631A Automatically Begins Taking Temperature Measurements at Power-Up
Operating Temperature Range: -55°C to +125°C (-67°F to +257°F)
Temperature Measurements Require No External Components
Output Resolution is User-Selectable to 9, 10, 11, or 12 Bits
Wide Power-Supply Range (+2.7V to +5.5V)
Converts Temperature-to-Digital Word in 750ms (max)
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