Overview
The LMT87DCKR, manufactured by Texas Instruments, is a precision CMOS temperature sensor designed for high accuracy and low power consumption. This device offers a linear analog output voltage that is inversely proportional to temperature, making it suitable for a wide range of temperature-sensing applications. With its 2.7-V supply voltage operation, low quiescent current of 5.4 µA, and fast power-on time of 0.7 ms, the LMT87DCKR is ideal for battery-powered systems such as drones and sensor nodes. It is also footprint compatible with industry-standard temperature sensors like the LM20/19 and LM35, and serves as a cost-effective alternative to thermistors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.7 to 5.5 | V |
| Quiescent Current | 5.4 | µA |
| Average Sensor Gain | -13.6 | mV/°C |
| Temperature Range | -50 to 150 | °C |
| Accuracy (Typical) | ±0.4 | °C |
| Accuracy (Maximum) | ±2.7 | °C |
| Output Current Drive Capability | ±50 | µA |
| Thermal Time Constant (Typical) | 10 s (1.2 m/s Airflow) | s |
| Package Types | SOT (SC70), TO-92, TO-92S |
Key Features
- Very accurate with ±0.4°C typical accuracy (±2.7°C maximum)
- Low 2.7-V operation and low quiescent current of 5.4 µA
- Average sensor gain of -13.6 mV/°C
- Wide temperature range from -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
- Fast thermal time constant, especially in the TO-92S package
Applications
- Automotive: Infotainment and cluster, powertrain systems
- Smoke and heat detectors
- Drones
- Appliances
- General temperature-sensing applications
- Battery-powered systems where power savings are critical
Q & A
- What is the typical accuracy of the LMT87DCKR temperature sensor? The typical accuracy is ±0.4°C, with a maximum accuracy of ±2.7°C.
- What is the supply voltage range for the LMT87DCKR? The supply voltage range is from 2.7 V to 5.5 V.
- What is the quiescent current of the LMT87DCKR? The quiescent current is 5.4 µA.
- What is the average sensor gain of the LMT87DCKR? The average sensor gain is -13.6 mV/°C.
- What is the temperature range of the LMT87DCKR? The temperature range is from -50°C to 150°C.
- Is the output of the LMT87DCKR short-circuit protected? Yes, the output is short-circuit protected.
- What is the drive capability of the output? The output has a ±50-µA drive capability.
- What packages are available for the LMT87DCKR? The available packages include SOT (SC70), TO-92, and TO-92S.
- How does the LMT87DCKR compare to thermistors? The LMT87DCKR is a cost-effective alternative to thermistors with higher accuracy and linear output.
- Can the LMT87DCKR be used in battery-powered applications? Yes, it is suitable for battery-powered applications due to its low power consumption and fast power-on time.
