LM81CIMTX-3

Product Overview

Category

LM81CIMTX-3 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used for temperature monitoring and control in various electronic devices.

Characteristics

• LM81CIMTX-3 is a digital temperature sensor with an I2C interface.
• It provides accurate temperature measurements with a resolution of 0.125°C.
• The device operates over a wide temperature range, making it suitable for various applications.
• It offers low power consumption, making it ideal for battery-powered devices.
• LM81CIMTX-3 has built-in thermal diodes for remote temperature sensing.

Package

LM81CIMTX-3 is available in a small outline package (SOT-23) which allows for easy integration into circuit boards.

Essence

The essence of LM81CIMTX-3 lies in its ability to accurately measure and monitor temperature in electronic systems, ensuring optimal performance and preventing overheating.

Packaging/Quantity

LM81CIMTX-3 is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Temperature Range: -55°C to +125°C
• Resolution: 0.125°C
• Supply Voltage: 2.7V to 5.5V
• Interface: I2C
• Accuracy: ±1°C (typical)
• Operating Current: 200µA (typical)

Detailed Pin Configuration

LM81CIMTX-3 features a 6-pin SOT-23 package with the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. SDA: Serial data line (I2C)
4. SCL: Serial clock line (I2C)
5. ALERT: Interrupt output for temperature threshold detection
6. NC: No connection (unused pin)

Functional Features

• Temperature Measurement: LM81CIMTX-3 accurately measures temperature using its built-in thermal diodes.
• I2C Interface: The device communicates with the host microcontroller through the I2C bus, allowing for easy integration into existing systems.
• Temperature Threshold Detection: LM81CIMTX-3 can generate an interrupt signal when the temperature exceeds a predefined threshold, enabling timely actions to prevent overheating.

Advantages and Disadvantages

Advantages

• Accurate temperature measurements
• Wide operating temperature range
• Low power consumption
• Small form factor for easy integration
• Built-in thermal diodes for remote temperature sensing

Disadvantages

• Limited resolution compared to some other temperature sensors
• Requires an I2C interface for communication

Working Principles

LM81CIMTX-3 utilizes the principle of thermal diodes to measure temperature. These diodes exhibit a voltage change proportional to the temperature, which is then converted into a digital value by the internal ADC. The I2C interface allows the device to communicate this temperature information to the host microcontroller.

Detailed Application Field Plans

LM81CIMTX-3 finds applications in various fields where temperature monitoring and control are crucial. Some examples include:

1. Consumer Electronics: Used in smartphones, tablets, and laptops to monitor battery temperature and prevent overheating.
2. Industrial Automation: Employed in industrial machinery and equipment to ensure optimal operating temperatures and prevent damage due to overheating.
3. Automotive: Integrated into automotive systems to monitor engine temperature, coolant temperature, and cabin temperature for efficient operation and passenger comfort.
4. Medical Devices: Utilized in medical equipment to monitor temperature-sensitive components and maintain safe operating conditions.

Detailed and Complete Alternative Models

There are several alternative models available in the market that offer similar functionality to LM81CIMTX-3. Some notable alternatives include:

1. LM75A: Digital temperature sensor with I2C interface and higher resolution.
2. TMP102: Low-power digital temperature sensor with I2C interface and high accuracy.
3. DS18B20: Programmable digital temperature sensor with a unique 1-wire interface.

These alternative models provide options for different requirements and can be considered based on specific application needs.

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