LM75AIM/NOPB
Digital temperature sensors with I2C interface in 8-pin SOIC packaging
Manufacturer： ['national-semiconductor', 'ti']
series introduction
# LM75AIM/NOPB Product Series Introduction
## 1. Overview
The LM75AIM/NOPB is a highly reliable and versatile temperature sensor product series offered by Texas Instruments. It belongs to the category of digital temperature sensors and is designed to provide accurate temperature measurements in a wide range of applications. With its compact size, low power consumption, and easy - to - use interface, the LM75AIM/NOPB has become a popular choice among engineers and designers.
## 2. Key Features
### 2.1 High Accuracy
The LM75AIM/NOPB offers a high - level of temperature measurement accuracy. It can measure temperatures with an accuracy of ±2°C over the temperature range of - 25°C to +100°C. This level of accuracy makes it suitable for applications where precise temperature monitoring is crucial, such as in medical devices, industrial control systems, and environmental monitoring.
### 2.2 Wide Temperature Range
It can operate over a wide temperature range from - 55°C to +125°C. This broad operating range allows the sensor to be used in various harsh environments, including automotive under - hood applications, outdoor weather stations, and industrial ovens.
### 2.3 Digital Interface
The sensor features an I²C (Inter - Integrated Circuit) digital interface. This interface simplifies the connection between the sensor and microcontrollers or other digital devices. It allows for easy communication and data transfer, enabling seamless integration into existing systems. The I²C interface also supports multiple devices on the same bus, which is useful for applications that require multiple temperature sensors.
### 2.4 Low Power Consumption
The LM75AIM/NOPB is designed with low power consumption in mind. It has a typical standby current of only 2 μA, which is ideal for battery - powered applications. This low power consumption helps to extend the battery life of portable devices and reduces the overall power requirements of the system.
### 2.5 Small Package Size
The sensor comes in a small SOP - 8 package. The compact size makes it suitable for space - constrained applications, such as in wearable devices, small - form - factor consumer electronics, and printed circuit boards with limited real estate.
## 3. Functional Block Diagram and Working Principle
### 3.1 Block Diagram
The LM75AIM/NOPB consists of a temperature sensor element, an analog - to - digital converter (ADC), and an I²C interface. The temperature sensor element senses the ambient temperature and converts it into an analog voltage signal. The ADC then converts this analog signal into a digital value, which can be read by the host device through the I²C interface.
### 3.2 Working Principle
When the sensor is powered on, it continuously monitors the ambient temperature. The temperature - sensitive element inside the sensor changes its electrical properties (such as resistance) in response to the temperature. This change is then converted into a proportional analog voltage. The ADC samples this voltage at regular intervals and converts it into a 9 - bit digital value. The digital value represents the measured temperature, and it can be accessed by the host device by sending appropriate commands over the I²C bus.
## 4. Applications
### 4.1 Consumer Electronics
In smartphones, tablets, and laptops, the LM75AIM/NOPB can be used to monitor the temperature of the battery, CPU, and other critical components. This helps to prevent overheating and ensures the reliable operation of the device. It can also be used in smart home devices, such as thermostats and air purifiers, to accurately measure the ambient temperature and adjust the operation accordingly.
### 4.2 Industrial Automation
In industrial control systems, the sensor can be used to monitor the temperature of motors, transformers, and
Images for reference
8-SOIC
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