Overview
The LMT87LPG is a precision CMOS temperature sensor produced by Texas Instruments. It is known for its high accuracy and low power consumption, making it an ideal choice for a variety of applications, including battery-powered devices and time-temperature sensitive systems. The sensor features a linear analog output voltage that is inversely proportional to temperature, with a typical accuracy of ±0.4°C and a maximum accuracy of ±2.7°C over a wide operating temperature range of –50°C to 150°C.
Key Specifications
| Specification | Value |
|---|---|
| Package | TO-92S |
| Pins | 3 |
| Operating Temperature Range (°C) | –50 to 150 |
| Supply Voltage (V) | 2.7 to 5.5 |
| Quiescent Current (µA) | 5.4 |
| Average Sensor Gain (mV/°C) | –13.6 |
| Thermal Time Constant (s) | 10 (typical at 1.2 m/s airflow) |
| Output Drive Capability (µA) | ±50 |
| Power-on Time (ms) | 0.7 |
| Output Load Capacitance (pF) | 1100 |
Key Features
- Fast Thermal Time Constant: 10-s typical (1.2 m/s airflow)
- Very Accurate: ±0.4°C typical accuracy
- Low 2.7-V Operation
- Low 5.4-µA Quiescent Current
- Wide Temperature Range: –50°C to 150°C
- Output is Short-Circuit Protected
- Push-Pull Output With ±50-µA Drive Capability
- Footprint Compatible With the Industry-Standard LM20/19 and LM35 Temperature Sensors
- Cost-Effective Alternative to Thermistors
Applications
The LMT87LPG is suitable for various applications, including:
- Battery-powered devices such as drones and sensor nodes, where low power consumption is crucial.
- Time-temperature sensitive applications like smoke and heat detectors.
- Automotive systems, especially with the AEC-Q100 qualified versions.
- Industrial and consumer electronics requiring precise temperature monitoring.
Q & A
- What is the typical accuracy of the LMT87LPG temperature sensor?
The LMT87LPG has a typical accuracy of ±0.4°C. - What is the operating temperature range of the LMT87LPG?
The operating temperature range is –50°C to 150°C. - What is the quiescent current of the LMT87LPG?
The quiescent current is 5.4 µA. - What is the thermal time constant of the LMT87LPG?
The thermal time constant is 10 seconds typical at 1.2 m/s airflow. - Is the output of the LMT87LPG short-circuit protected?
Yes, the output is short-circuit protected. - What is the average sensor gain of the LMT87LPG?
The average sensor gain is –13.6 mV/°C. - What is the power-on time of the LMT87LPG?
The power-on time is 0.7 ms. - Is the LMT87LPG footprint compatible with other industry-standard temperature sensors?
Yes, it is footprint compatible with the industry-standard LM20/19 and LM35 temperature sensors. - What are some typical applications of the LMT87LPG?
Typical applications include battery-powered devices, time-temperature sensitive systems, automotive systems, and industrial/consumer electronics. - What is the supply voltage range for the LMT87LPG?
The supply voltage range is 2.7 to 5.5 volts.
