Overview
The LM73CIMKX-0/NOPB is a digital temperature sensor chip produced by Texas Instruments. This device is designed to provide high accuracy and resolution in temperature measurements, making it suitable for a wide range of applications. The LM73 occupies a small 6-pin SOT-23 package, minimizing board space while operating over a broad temperature range of –40°C to 150°C. It offers programmable digital temperature resolution from 11 bits to 14 bits, allowing users to optimize between conversion time and sensitivity. The device features an SMBus and I2C-compatible two-wire interface, supporting up to 400 kHz operation, and includes an open-drain ALERT output that goes active when the temperature exceeds a programmable limit.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V |
| Supply Current (Operating) | 320 µA (Typical), 495 µA (Maximum) |
| Supply Current (Shutdown) | 8 µA (Maximum), 1.9 µA (Typical) |
| Temperature Accuracy | –10°C to 80°C: ±1.0°C (Maximum) –25°C to 115°C: ±1.5°C (Maximum) –40°C to 150°C: ±2°C (Maximum) |
| Resolution | 0.25°C to 0.03125°C |
| Conversion Time | 11-Bit (0.25°C): 14 ms (Maximum) 14-Bit (0.03125°C): 112 ms (Maximum) |
| Interface | SMBus and I2C-compatible two-wire interface |
| Operating Temperature Range | –40°C to 150°C |
| Package | SOT-23-THN (DDC), 6 pins |
Key Features
- Programmable digital temperature resolution from 11 bits to 14 bits.
- Fast conversion rate, ideal for quick power-up and measuring rapidly changing temperatures.
- Open-drain ALERT output pin that goes active when the temperature exceeds a programmable limit.
- Shutdown mode with one-shot feature available for very low average power consumption.
- Very stable, low-noise digital output.
- SMBus and I2C-compatible two-wire interface, supporting up to 400 kHz operation.
- Filtered data and clock lines for excellent noise tolerance and reliable communication.
- Time-out feature on the clock and data lines to automatically reset the lines in case of bus lock-up.
- UL recognized component.
Applications
- Portable electronics.
- Notebook computers.
- Automotive systems.
- System thermal management.
- Office electronics.
- Industrial automation.
- Telecommunications equipment.
- Consumer electronics.
- Medical devices.
- HVAC systems).
Q & A
- What is the operating temperature range of the LM73CIMKX-0/NOPB?
The operating temperature range is –40°C to 150°C. - What are the supply voltage requirements for the LM73CIMKX-0/NOPB?
The supply voltage ranges from 2.7 V to 5.5 V). - What is the resolution of the LM73CIMKX-0/NOPB temperature sensor?
The resolution is programmable from 0.25°C to 0.03125°C). - How long does it take for the LM73CIMKX-0/NOPB to convert temperature in 11-bit and 14-bit modes?
In 11-bit mode, the conversion time is up to 14 ms, and in 14-bit mode, it is up to 112 ms). - What interface does the LM73CIMKX-0/NOPB use for communication?
The device uses an SMBus and I2C-compatible two-wire interface). - Does the LM73CIMKX-0/NOPB have a shutdown mode?
Yes, it has a shutdown mode with a one-shot feature for low average power consumption). - What is the purpose of the ALERT output pin on the LM73CIMKX-0/NOPB?
The ALERT output pin goes active when the temperature exceeds a programmable limit). - How does the LM73CIMKX-0/NOPB handle bus lock-up situations?
The device has a time-out feature that automatically resets the clock and data lines if either is held low for an extended time). - Is the LM73CIMKX-0/NOPB UL recognized?
Yes, it is a UL recognized component). - What are some common applications of the LM73CIMKX-0/NOPB?
Common applications include portable electronics, notebook computers, automotive systems, system thermal management, and industrial automation).
