TI digital temp sensors simplify RTD-based and medical designs

TI digital temp sensors simplify RTD-based and medical designs

New Products |
By Rich Pell

Designed to simplify system design for industrial and medical applications, with zero calibration during manufacturing, the TMP117 temperature sensors offer ±0.1°C accuracy across a wide temperature range.

The TMP117 is offered 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, while the TMP117M – a digital temperature sensor for medical applications – supports requirements for medical thermometers.

The TMP117 provides a direct readout of temperature, with no additional linearization or acquisition error, and maintains accurate temperature over a wide range:

  • ±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

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.

Both the TMP117 and TMP117M are I2C- and SMBus-interface compatible and provide a direct digital readout of the temperature. The devices also feature a power consumption of 6.3 µW.

Both devices are available now in 6-pin WSON no-lead packaging. The TMP117 and TMP117M are priced at $1.60 and $2.44 respectively, in 1,000-unit quantities. An evaluation board – the TMP117EVM – is also available.

Texas Instruments

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