Texas Instruments LMT70 Precision Analog Temperature Sensors
Texas Instruments LMT70 Precision Analog Temperature Sensors are an ultra-small, high-precision, low-power CMOS analog temperature sensor with an output enable pin. Typical applications for the LMT70 from Texas Instruments include virtually any type of temperature sensing where cost-effective, high precision and low-power are required. These include such items as Internet of Things (IoT) sensor nodes, medical thermometers, high-precision instrumentation and battery powered devices. The LMT70 is also a great replacement for RTD and precision NTC/PTC thermistors. Its output enable pin allows multiple LMT70s to share one ADC channel, thus simplifying ADC calibration and reducing the overall system cost for precision temperature sensing.
Features
- Accuracy
- ±0.05°C (typ) or ±0.13°C (max) at +30°C
- ±0.2°C (max) from +20°C to +90°C
- ±0.23°C (max) from +90°C to +110°C
- ±0.36°C (max) from -55°C to +150°C
- −55°C to +150°C temperature range
- Matching of two adjacent LMT70A on tape and reel: 0.1°C (max) at +30°C
- Linear analog temperature sensor with output enable pin
- -5.19 mV/°C NTC output slope
- Output on/off switch with RDSon <80Ω
- 2.0V to 5.5V power supply range
- 12µA (max) power supply current
- Ultra small 0.88mm x 0.88mm 4-bump WLCSP (ball grid) package
Applications
- Internet of Things (IoT) sensor nodes
- Industrial RTD (Class AA) or precision NTC/PTC thermistor replacement
- Medical/fitness equipment
- Medical thermometer
- Human body temperature monitor
- Metering temperature compensation
Functional Block Diagram
Additional Resources
Associated Development Tool
Texas Instruments LMT70 Temperature Sensor Tool
Allows users to evaluate the performance of the LMT70 analog output temperature sensor.
TI Reference Designs Library
Publicerad: 2015-06-03
| Uppdaterad: 2023-10-31