Digital Temperature Sensors
Digital temperature sensors are one of the easiest temperature sensors to use and have either an SPI or I²C interface. They are a complete plug and play solution that provides digital output with excellent accuracy and no signal conditioning required. Their main drawback is limited temperature range (−55°C to +155°C).
All digital temperature sensors contain an internal band gap reference, a temperature sensor, and a precision analog-to-digital converter (ADC). The output is a 16-bit temperature result with a resolution of 0.0078°C and an accuracy of up to ±0.25°C without the need for calibration after the printed circuit board (PCB) soldering process.
The newest addition to this family of digital temperature sensors is the ADT7422, which is a high accuracy ±0.1°C, digital I²C temperature sensor designed to meet the clinical thermometry specification of the ASTM E1112 standards when soldered onto the final PCB.
Temperature Measurement Theory and Practical Techniques
Temperature measurement design requires a thoughtful understanding of heat transfer theory, whether those measurements are of ambient temperature or within a PCB.

Accurate Digital Temperature Sensor Evaluation Platform

Quick and Easy Sensor Evaluation System
The EV-TempSense-ARDZ is a fully featured Arduino shield enabling easy evaluation of the functionality and performance of ADI’s precision digital temperature sensors.

Multiple Software Development Platforms
Choice of Arduino, Mbed, or ACE development platforms for the ADT74xx/ADT73xx digital temperature sensors. The platforms include on-board ribbon cable connectors appropriate for I²C or SPI interfaces, as well as miniature remote sensor boards.

Documentation and Design Guides
Get your design started with all the latest schematic diagrams and user guides.
Interactive Signal Chains

CN0172
Features & Benefits
- 3 channel K-type thermocouple measurement system
- Typical temperature range of -200 C to +1200 C
- Highly accurate temperature measurement to 0.25 degrees
- 16-bit digital temperature sensor used for cold junction compensation