Overview
The LMT85LPGM is a precision CMOS temperature sensor produced by Texas Instruments. It is designed to offer high accuracy and low power consumption, making it suitable 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 its operating range.
Key Specifications
| Parameter | Value |
|---|---|
| Package | TO-92 (LPG), SC70 |
| Pins | 3 |
| Operating Temperature Range (°C) | -50 to 150 |
| Supply Voltage | 1.8 V |
| Quiescent Current | 5.4 µA |
| Average Sensor Gain | -8.2 mV/°C |
| Power-On Time | 0.7 ms |
| Output Drive Capability | ±50 µA |
| Thermal Time Constant (Typical) | 10 s (1.2 m/s Airflow) |
Key Features
- Very Accurate: ±0.4°C Typical, ±2.7°C Maximum
- Low 1.8-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
- Fast Thermal Time Constant, 10-s Typical (1.2 m/s Airflow)
Applications
The LMT85LPGM is suitable for various applications, including:
- Battery-powered devices such as drones and sensor nodes due to its low power consumption and fast power-on time.
- Time-temperature sensitive applications like smoke and heat detectors, benefiting from its fast thermal time constant.
- Industrial and automotive systems requiring precise temperature measurement over a wide temperature range.
Q & A
- What is the operating temperature range of the LMT85LPGM?
The operating temperature range of the LMT85LPGM is -50°C to 150°C.
- What is the typical accuracy of the LMT85LPGM temperature sensor?
The typical accuracy of the LMT85LPGM is ±0.4°C, with a maximum accuracy of ±2.7°C.
- What is the supply voltage requirement for the LMT85LPGM?
The LMT85LPGM operates at a supply voltage of 1.8 V.
- What is the quiescent current of the LMT85LPGM?
The quiescent current of the LMT85LPGM is 5.4 µA.
- Is the output of the LMT85LPGM short-circuit protected?
Yes, the output of the LMT85LPGM is short-circuit protected.
- What is the thermal time constant of the LMT85LPGM?
The thermal time constant of the LMT85LPGM is typically 10 seconds at an airflow of 1.2 m/s.
- Is the LMT85LPGM footprint compatible with other industry-standard temperature sensors?
Yes, the LMT85LPGM is footprint compatible with the industry-standard LM20/19 and LM35 temperature sensors.
- What are some typical applications for the LMT85LPGM?
The LMT85LPGM is typically used in battery-powered devices, time-temperature sensitive applications, and industrial/automotive systems requiring precise temperature measurement.
- How does the LMT85LPGM compare to thermistors?
The LMT85LPGM is a cost-effective alternative to thermistors, offering higher accuracy and a linear analog output.
- What is the output drive capability of the LMT85LPGM?
The output drive capability of the LMT85LPGM is ±50 µA.
