Overview
The LM75AIMX/NOPB is a digital temperature sensor and thermal watchdog produced by Texas Instruments. This component incorporates a band-gap type temperature sensor and a 9-bit sigma-delta analog-to-digital converter (ADC) with an I2C interface. It is designed to provide accurate temperature measurements and features a dedicated overtemperature output with programmable limit and hysteresis. The LM75A is available in SOIC-8 and VSSOP-8 packages, making it versatile for various applications requiring thermal management.
Key Specifications
| Specification | Value |
|---|---|
| Temperature Range | -55°C to 125°C |
| Temperature Accuracy | -25°C to 100°C: ±2°C (Max), -55°C to 125°C: ±3°C (Max) |
| Resolution | 9-bit |
| Supply Current (Operating) | 280 μA (Typical) |
| Supply Current (Shutdown) | 4 μA (Typical) |
| Interface | I2C |
| Package Type | SOIC-8, VSSOP-8 |
| Slave Address | 7-bit, with 4 most significant bits hardwired as '1001' and 3 least significant bits set by pins A2-A0 |
Key Features
- Digital temperature sensor with 9-bit sigma-delta ADC
- Dedicated overtemperature output with programmable limit and hysteresis
- Shutdown mode to minimize power consumption
- Integrated low-pass filters on SDA and SCL lines for improved communication reliability in noisy environments
- Bus fault timeout feature and fault queue to prevent false tripping of the overtemperature output
- Temperature data output available via I2C bus at all times
Applications
The LM75A is ideal for various applications where thermal management is critical, including base stations, electronic test equipment, office electronics, personal computers, and any other system requiring precise temperature monitoring.
Q & A
- What is the temperature range of the LM75AIMX/NOPB?
The temperature range of the LM75AIMX/NOPB is -55°C to 125°C. - What is the resolution of the temperature sensor?
The resolution of the temperature sensor is 9-bit. - What interface does the LM75AIMX/NOPB use?
The LM75AIMX/NOPB uses an I2C interface. - What are the typical supply currents for operating and shutdown modes?
The typical supply current in operating mode is 280 μA, and in shutdown mode, it is 4 μA. - What are the available package types for the LM75AIMX/NOPB?
The LM75AIMX/NOPB is available in SOIC-8 and VSSOP-8 packages. - How is the slave address of the LM75AIMX/NOPB configured?
The slave address is 7-bit, with the 4 most significant bits hardwired as '1001' and the 3 least significant bits set by pins A2-A0. - What is the purpose of the integrated low-pass filters on the SDA and SCL lines?
The integrated low-pass filters improve communication reliability in noisy environments. - Does the LM75AIMX/NOPB have a shutdown mode?
Yes, the LM75AIMX/NOPB has a shutdown mode to minimize power consumption. - What is the function of the fault queue in the LM75AIMX/NOPB?
The fault queue prevents false tripping of the overtemperature output by requiring a specified number of consecutive error conditions. - In which applications is the LM75AIMX/NOPB commonly used?
The LM75AIMX/NOPB is commonly used in base stations, electronic test equipment, office electronics, personal computers, and other systems requiring thermal management.
