Texas Instruments TMP119 High-Precision Digital Temperature Sensor
Texas Instruments TMP119 High-Precision Digital Temperature Sensor is designed to help meet electronic patient thermometers' ASTM E1112 and ISO 80601 accuracy requirements. The TMP119 provides a 16-bit temperature result with an accuracy of up to ±0.08°C and a resolution of 0.0078°C across the temperature range of 0°C to 45°C with no calibration. The TMP119 has programmable alert functionality, an interface that is I2C- and SMBus™-compatible, and the device can support up to four devices on a single bus. An integrated EEPROM is included for device programming, with an additional 48 bits of memory available for general use. The TMP119 operates from 1.7V to 5.5V and typically consumes 3.5µA for a 1Hz conversion cycle.
The Texas Instruments TMP119 can be a single-chip digital alternative to a Platinum RTD for non-medical applications. The TMP119 uses a fraction of the power typically needed for a PT100 RTD and has an accuracy comparable to a Class AA RTD. The TMP119 simplifies the design effort by removing many of the complexities of RTDs, such as matched traces, precision references, complicated algorithms, and calibration. The device is designed to be strain tolerant, allowing robustness over typical strains often seen in PCB manufacturing, including device soldering, molding, underfill, and board flexing. The TMP119 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
- TMP119 high-accuracy temperature sensor
- ±0.03°C (typical) from 0°C to 45°C
- ±0.08°C (maximum) from 0°C to 45°C
- ±0.09°C (maximum) from –25°C to 85°C
- ±0.12°C (maximum) from –40°C to 85°C
- ±0.15°C (maximum) from –55°C to 125°C
- ±0.2°C (maximum) from –55°C to 150°C
- –55°C to 150°C operating temperature range
- Low power consumption
- 3.5µA, 1Hz conversion cycle
- 150nA shutdown current
- Supply range
- 1.7V to 5.5V from –55°C to 70°C
- 1.8V to 5.5V from –55°C to 150°C
- 16-bit resolution of 0.0078°C (1LSB)
- Programmable temperature alert limits
- Selectable averaging
- Strain Tolerance
- Digital offset for system correction
- 48 bits general-purpose EEPROM
- NIST traceability
- SMBus™, I2C interface compatibility
- Medical grade helps meet ASTM E1112 and ISO 80601-2-56
- RTDs replacement for PT100, PT500, and PT1000
Applications
- Electronic thermometers
- Wireless environmental sensors
- Thermostats
- Automotive test equipment
- Wearable fitness and activity monitors
- Cold chain asset tracking
- Gas meters and heat meters
- Temperature transmitters
Functional Block Diagram
Related Development Tool
Texas Instruments TMP119EVM Sensor Evaluation Module (EVM)
Evaluates the TMP119 and gain familiarity with the device down to the bit-by-bit register level.