Overview
The LMT87DCKT is a precision CMOS temperature sensor produced by Texas Instruments. It offers high accuracy and a linear analog output voltage that is inversely proportional to temperature. The device is designed to operate at a low supply voltage of 2.7V, making it suitable for battery-powered applications such as drones and sensor nodes. With a quiescent current of 5.4 µA and a power-on time of 0.7 ms, the LMT87DCKT is optimized for power efficiency. Its wide operating temperature range of –50°C to 150°C and fast thermal time constant make it an excellent choice for various applications, including automotive, infotainment, powertrain systems, and smoke and heat detectors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.7V to 5.5V | V |
| Quiescent Current | 5.4 µA | A |
| Power-On Time | 0.7 ms | ms |
| Temperature Range | –50°C to 150°C | °C |
| Accuracy | ±0.4°C (typical), ±2.7°C (maximum) | °C |
| Average Sensor Gain | -13.6 mV/°C | mV/°C |
| Output Drive Capability | ±50 µA | A |
| Thermal Time Constant (TO-92S package) | 10 s (typical, 1.2 m/s airflow) | s |
| Package Type | SC70-5, TO-92, TO-92S | - |
Key Features
- Very accurate: ±0.4°C typical accuracy (±2.7°C maximum)
- Low 2.7-V operation with a wide supply voltage range of 2.7V to 5.5V
- Low quiescent current of 5.4 µA
- Fast power-on time of 0.7 ms
- Wide operating temperature range: –50°C to 150°C
- Output is short-circuit protected
- Push-pull output with ±50-µA drive capability
- Footprint compatible with industry-standard LM20/19 and LM35 temperature sensors
- Cost-effective alternative to thermistors
Applications
- Automotive: infotainment and cluster, powertrain systems
- Smoke and heat detectors
- Drones
- Appliances
- Battery-powered applications and sensor nodes
Q & A
- What is the typical accuracy of the LMT87DCKT temperature sensor?
The LMT87DCKT has a typical accuracy of ±0.4°C and a maximum accuracy of ±2.7°C.
- What is the operating supply voltage range of the LMT87DCKT?
The LMT87DCKT operates within a supply voltage range of 2.7V to 5.5V.
- What is the quiescent current of the LMT87DCKT?
The quiescent current of the LMT87DCKT is 5.4 µA.
- What is the thermal time constant for the TO-92S package of the LMT87DCKT?
The thermal time constant for the TO-92S package is 10 seconds (typical, 1.2 m/s airflow).
- Is the output of the LMT87DCKT short-circuit protected?
- What is the drive capability of the LMT87DCKT's output?
The output has a drive capability of ±50 µA.
- What are some common applications of the LMT87DCKT?
- Is the LMT87DCKT footprint compatible with other industry-standard temperature sensors?
- What is the power-on time of the LMT87DCKT?
- Is the LMT87DCKT a cost-effective alternative to thermistors?
