INA240A2DR

Product Overview

Category: Integrated Circuit (IC)

Use: The INA240A2DR is a high-precision, low-drift, bidirectional current-sensing amplifier. It is designed for use in applications that require accurate measurement of both positive and negative currents.

Characteristics: - High precision: The INA240A2DR offers excellent accuracy with a maximum offset voltage of 50µV and a maximum gain error of 0.1%. - Low drift: It has a low temperature drift, ensuring stable performance over a wide range of operating temperatures. - Bidirectional sensing: The device can measure both positive and negative currents accurately. - Wide supply voltage range: It operates from a single power supply voltage ranging from 2.7V to 5.5V. - Small package: The INA240A2DR comes in a small SOT-23 package, making it suitable for space-constrained applications. - Packaging/Quantity: The device is typically available in reels of 3000 units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Input Common-Mode Voltage Range: -0.1V to +26V
• Gain Error: ±0.1%
• Offset Voltage: ±50µV
• Bandwidth: 350kHz
• Quiescent Current: 60µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The INA240A2DR has the following pin configuration:

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| | --| IN+ OUT |-- --| IN- GND |-- --| REF+ V+ |-- --| REF- V- |-- |___________| ```

Functional Features

• High Accuracy: The INA240A2DR provides precise current measurements with minimal errors.
• Bidirectional Sensing: It can accurately measure both positive and negative currents, making it suitable for applications such as battery monitoring and motor control.
• Low Drift: The device exhibits low temperature drift, ensuring stable performance over a wide range of operating conditions.
• Wide Supply Voltage Range: It can operate from a single power supply voltage ranging from 2.7V to 5.5V, offering flexibility in various applications.
• Small Package Size: The compact SOT-23 package allows for easy integration into space-constrained designs.

Advantages and Disadvantages

Advantages: - High precision and accuracy - Bidirectional current sensing capability - Low temperature drift - Wide supply voltage range - Compact package size

Disadvantages: - Limited bandwidth compared to some other current-sensing amplifiers - Not suitable for high-frequency applications

Working Principles

The INA240A2DR utilizes a differential amplifier configuration to measure the voltage across a shunt resistor connected in series with the current being sensed. The voltage drop across the shunt resistor is amplified and converted into a proportional output voltage. By carefully controlling the gain and offset, the device provides accurate current measurements.

Application Field Plans

The INA240A2DR finds applications in various fields, including:

1. Battery Monitoring: Accurate current measurement is crucial for monitoring battery charging and discharging processes.
2. Motor Control: The bidirectional current sensing capability makes it suitable for controlling the speed and direction of motors.
3. Power Management: The device can be used in power management systems to monitor and regulate current flow.
4. Energy Harvesting: It enables precise measurement of energy harvested from renewable sources like solar panels or wind turbines.
5. Industrial Automation: Current sensing is essential in industrial automation systems for monitoring and controlling electrical loads.

Alternative Models

1. INA240A1DR: Similar to the INA240A2DR, but with a single-ended output.
2. INA240A3DR: Offers higher bandwidth for applications requiring faster response times.
3. INA240B2DR: Provides additional features such as built-in overcurrent protection.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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