Digital Temperature Sensors Simplify RTD-Based Designs

Texas Instruments’ latest temperature sensor family offers ±0.1°C accuracy across a wide temperature range and promises to simplify system design for industrial and medical applications. The TMP117 is touted as the first single-chip temperature sensor to offer similar performance to platinum resistance temperature detectors (RTDs) while significantly reducing design complexity and power consumption, and the TMP117M, a digital temperature sensor for medical applications, supports requirements for medical thermometers.


For medical applications, the TMP117M provides ± 0.1°C accuracy from 30°C to 45°C and supports American Society for Testing and Materials (ASTM) E1112 and International Organization for Standardization (ISO) 80601 requirements for patient thermometers. The TMP117 provides a direct readout of temperature, with no additional linearization or acquisition error, and maintains accurate temperature over a wide range:

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  • ±0.1°C from -20°C to +50°C.
  • ±0.15°C from -40°C to +50°C.
  • ±0.2°C from -40°C to +100°C.
  • ±0.25°C from -55°C to +125°C.
  • ±0.3°C from -55°C to +150°C.

Both sensors are available now in six-pin WSON no-lead packaging. The TMP117 and TMP117M are priced at $1.60 and $2.44 respectively, each/1,000. For more details, download the TMP117 digital temperature sensor data sheet.

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