Overview
The LM73CIMK-0/NOPB is a digital-output temperature sensor produced by Texas Instruments. This integrated sensor features an incremental Delta-Sigma ADC and is compatible with SMBus and I2C interfaces. It operates over a wide temperature range of –40°C to 150°C and provides ±1°C accuracy from –10°C to 80°C. The LM73 is available in a compact 6-pin SOT-23 package, making it ideal for applications where board space is limited. Although the LM73CIMK-0/NOPB is no longer in production, it remains a significant component in existing designs due to its robust features and performance.
Key Specifications
| Parameter | Description |
|---|---|
| Package | 6-pin SOT-23-THN (DDC) |
| Operating Temperature Range | –40°C to 150°C |
| 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) |
Key Features
- SMBus and I2C-compatible two-wire interface supporting 400-KHz operation
- Shutdown mode with one-shot feature for very low average power consumption
- 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 goes active when temperature exceeds a programmed limit
- Very stable, low-noise digital output
- UL recognized component
- Single multi-level address line selects one of three unique device addresses
- Time-out feature on clock and data lines to prevent bus lock-up conditions
Applications
The LM73CIMK-0/NOPB is suitable for a variety of applications that require precise temperature measurement, including:
- Industrial automation and control systems
- Medical devices and equipment
- Aerospace and defense systems
- Automotive systems, especially in engine and battery management
- Consumer electronics, such as smart home devices and appliances
Q & A
- What is the operating temperature range of the LM73CIMK-0/NOPB?
The operating temperature range is –40°C to 150°C.
- What is the typical supply current of the LM73CIMK-0/NOPB in operating mode?
The typical supply current in operating mode is 320 µA.
- What are the resolution options for the LM73CIMK-0/NOPB?
The resolution can be programmed from 11 bits to 14 bits, offering resolutions from 0.25°C to 0.03125°C.
- Does the LM73CIMK-0/NOPB support SMBus and I2C interfaces?
- What is the purpose of the ALERT output pin?
The ALERT output pin goes active when the temperature exceeds a programmed limit.
- How does the LM73CIMK-0/NOPB prevent bus lock-up conditions?
- What is the difference between the LM73CIMKX-0/NOPB and LM73CIMKX-1/NOPB?
- Is the LM73CIMK-0/NOPB still in production?
- What is the package type of the LM73CIMK-0/NOPB?
- What are the typical and maximum shutdown currents of the LM73CIMK-0/NOPB?
