Overview
The LM73CIMKX-1/NOPB is a digital-output temperature sensor produced by Texas Instruments. This component features an incremental Delta-Sigma ADC with a two-wire interface compatible with both SMBus and I2C protocols. It is available in a compact 6-pin SOT-23 package, making it ideal for applications where board space is limited. The LM73 operates over a wide temperature range of –40°C to 150°C and provides high accuracy, with ±1°C accuracy from –10°C to 80°C. It is designed for low-power consumption and offers programmable digital temperature resolution, making it suitable for various applications requiring precise temperature measurements.
Key Specifications
| Parameter | Typical | Maximum |
|---|---|---|
| Supply Current (Operating) | 320 µA | 495 µA |
| Supply Current (Shutdown) | 1.9 µA | 8 µA |
| Temperature Accuracy | –10°C to 80°C: ±1.0°C –25°C to 115°C: ±1.5°C –40°C to 150°C: ±2.0°C | |
| Resolution | 0.25°C to 0.03125°C | |
| Conversion Time (11-Bit) | 14 ms | |
| Conversion Time (14-Bit) | 112 ms |
Key Features
- SMBus and I2C-compatible two-wire interface supporting up to 400 kHz operation
- Programmable digital temperature resolution from 11 bits to 14 bits
- Fast conversion rate ideal for quick power-up and measuring rapidly changing temperatures
- Shutdown mode with one-shot feature for very low average power consumption
- 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
- Integrated low-pass filters on SMBCLK and SMBDAT lines for noise tolerance and reliable communication
Applications
- Portable electronics
- Notebook computers
- Automotive systems
- System thermal management
- Office electronics
Q & A
- What is the temperature range of the LM73CIMKX-1/NOPB?
The LM73CIMKX-1/NOPB operates over a temperature range of –40°C to 150°C. - What is the accuracy of the LM73CIMKX-1/NOPB?
The accuracy is ±1.0°C from –10°C to 80°C, ±1.5°C from –25°C to 115°C, and ±2.0°C from –40°C to 150°C. - What are the programmable resolutions of the LM73CIMKX-1/NOPB?
The resolutions are programmable from 11 bits (0.25°C/LSB) to 14 bits (0.03125°C/LSB). - How long does the LM73CIMKX-1/NOPB take 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 is the supply current in operating and shutdown modes?
In operating mode, the typical supply current is 320 µA and the maximum is 495 µA. In shutdown mode, the typical supply current is 1.9 µA and the maximum is 8 µA. - Does the LM73CIMKX-1/NOPB have an ALERT output?
Yes, the LM73CIMKX-1/NOPB features an open-drain ALERT output pin that goes active when the temperature exceeds a programmed limit. - Is the LM73CIMKX-1/NOPB compatible with SMBus and I2C?
Yes, it is compatible with both SMBus and I2C protocols and supports up to 400 kHz operation. - What is the package type of the LM73CIMKX-1/NOPB?
The LM73CIMKX-1/NOPB is available in a 6-pin SOT-23 package. - Does the LM73CIMKX-1/NOPB have integrated noise filters?
Yes, it has integrated low-pass filters on both the SMBCLK and SMBDAT lines for noise tolerance and reliable communication. - Is the LM73CIMKX-1/NOPB UL recognized?
Yes, it is a UL recognized component.
