Overview
The LM75AIMME/NOPB is an industry-standard digital temperature sensor manufactured by Texas Instruments. It integrates a sigma-delta analog-to-digital converter (ADC) and an I2C interface, providing accurate digital temperature readings. The device operates with a single supply voltage ranging from 2.7 V to 5.5 V and communicates over a 2-wire interface up to 400 kHz. It is available in both SOIC-8 and VSSOP-8 packages, making it versatile for various applications where thermal management is critical.
Key Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V |
| Supply Current (Operating) | 280 µA (Typical) |
| Supply Current (Shutdown) | 4 µA (Typical) |
| Temperature Accuracy (25°C to 100°C) | ±2°C (Max) |
| Temperature Accuracy (55°C to 125°C) | ±3°C (Max) |
| Operating Temperature Range | -55°C to 125°C |
| Package Type | SOIC-8, VSSOP-8 |
| I2C Interface Speed | Up to 400 kHz |
Key Features
- No external components required for operation.
- Shutdown mode to minimize power consumption.
- Up to eight LM75A devices can be connected to a single I2C bus.
- Power-up defaults permit stand-alone operation as a thermostat.
- Dedicated overtemperature output (O.S.) with programmable limit and hysteresis.
- Programmable fault tolerance to define the number of consecutive error conditions before O.S. is activated.
Applications
The LM75A is ideal for various applications where thermal management is critical, including:
- Base stations
- Electronic test equipment
- Office electronics
- Personal computers
- General system thermal management
Q & A
- What is the operating temperature range of the LM75A?
The LM75A operates over a temperature range of -55°C to 125°C.
- What is the supply voltage range for the LM75A?
The LM75A operates with a supply voltage ranging from 2.7 V to 5.5 V.
- What is the typical supply current in operating mode?
The typical supply current in operating mode is 280 µA.
- How many LM75A devices can be connected to a single I2C bus?
Up to eight LM75A devices can be connected to a single I2C bus.
- What is the temperature accuracy of the LM75A from 25°C to 100°C?
The temperature accuracy from 25°C to 100°C is ±2°C (Max).
- Does the LM75A require external components for operation?
No, the LM75A does not require external components for operation.
- What is the purpose of the overtemperature output (O.S.)?
The overtemperature output (O.S.) is dedicated with programmable limit and hysteresis, and it has programmable fault tolerance to define the number of consecutive error conditions before it is activated.
- What are some common applications of the LM75A?
The LM75A is commonly used in base stations, electronic test equipment, office electronics, personal computers, and general system thermal management.
- What is the maximum speed of the I2C interface?
The I2C interface operates up to 400 kHz.
- In what packages is the LM75A available?
The LM75A is available in both SOIC-8 and VSSOP-8 packages.
