Texas Instruments TMP118 I2C Digital Temperature Sensors
Texas Instrument TMP118 I2C Digital Temperature Sensors are available in an industry-leading 0.55mm × 0.61mm × 0.24mm PICOSTAR package. The TMP118 provides a 16-bit temperature result with a resolution of 0.0078125°C and an accuracy of up to ±0.1°C across the temperature range of 0°C to 50°C with no additional calibration. The device is designed to help meet the system-level ASTM E1112 and ISO 80601 accuracy requirements for electronic patient thermometers.
The TMP118 is designed to operate from a supply voltage as low as 1.4V, with a low average and shutdown current of 1.4µA (at 1Hz, no averaging) and 80nA, respectively, allowing for an on-demand temperature conversion to maximize battery life. The TMP118 has an interface that is I2C- and SMBus-compatible and has programmable alert functionality. Logic level as low as 1V can be supported regardless of the main supply rail, enabling interoperability with a low voltage 1.2V controller without an additional voltage level shifter.
The device offers unique IDs for improved traceability. The Texas Instruments TMP118 units are 100% tested on a production setup that is NIST traceable and verified with equipment that is calibrated to ISO/IEC 17025 accredited standards.
Features
- Ultra-small, ultra-thin PicoStar™ package
- Size: 0.55 × 0.61 × 0.24mm
- Small thermal mass: 0.14mJ/°C
- TMP118 high-accuracy temperature sensor
- ±0.05°C (typical) from 0°C to 50°C
- ±0.1°C (maximum) from 0°C to 50°C
- ±0.2 °C (maximum) from -20°C to 85°C
- ±0.4 °C (maximum) from -40°C to 125°C
- Low power consumption
- 55µA active current
- 80nA shutdown current
- 1.4µA average current, 1Hz conversion cycle
- Supply range of 1.4V to 5.5V
- 1.2V logic compatible (independent of supply)
- Three averaging options to reduce measurement noise
- 16-bit resolution of 0.0078125°C (LSB)
- I2C and SMBus compatible
- I3C mixed bus co-existence capable
- Programmable temperature alert limits
- NIST traceability with unique device IDs
Applications
- Mobile phones
- Smartwatch
- Smart trackers
- Tablets
- Medical sensor patches
Simplified Schematic
Development Tool
Texas Instruments TMP118EVM Evaluation Module (EVM)
This module provides a quick setup to evaluate the TMP118 device and gain familiarity.