INA240A3DR

Product Overview

Category: Integrated Circuit (IC)

Use: The INA240A3DR 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 INA240A3DR offers exceptional accuracy with a maximum offset voltage of 50µV and a maximum gain error of 0.1%. - Low drift: It features a low temperature drift of 0.5µV/°C, ensuring stable performance over a wide range of operating temperatures. - Bidirectional sensing: This amplifier can accurately measure both positive and negative currents, making it suitable for applications such as battery monitoring and motor control. - Small package: The INA240A3DR comes in a small SOT-23 package, allowing for space-efficient integration into various electronic systems. - Packaging/Quantity: It is typically available in reels of 3000 units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Common-Mode Voltage Range: -0.1V to +26V
• Input Offset Voltage: ±50µV (maximum)
• Gain Error: ±0.1% (maximum)
• Temperature Drift: 0.5µV/°C (maximum)
• Bandwidth: 350kHz (typical)
• Quiescent Current: 60µA (typical)

Pin Configuration

The INA240A3DR has the following pin configuration:

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

Functional Features

1. High Accuracy: The INA240A3DR provides precise current measurements with low offset voltage and gain error.
2. Bidirectional Sensing: It accurately measures both positive and negative currents, enabling versatile applications.
3. Low Drift: The amplifier maintains stability over a wide temperature range due to its low temperature drift.
4. Small Package: 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 ensures stable performance - Compact package for space-efficient integration

Disadvantages: - Limited supply voltage range (2.7V to 5.5V) - Relatively low bandwidth compared to some other amplifiers

Working Principles

The INA240A3DR utilizes a differential amplifier configuration to measure the voltage across a shunt resistor connected in series with the current path. By amplifying the small voltage drop across the shunt resistor, it accurately represents the current flowing through it. The bidirectional sensing capability is achieved by using a symmetrical input stage that can handle both positive and negative voltage differences.

Application Field Plans

The INA240A3DR finds applications in various fields, including:

1. Battery Monitoring: Accurate current measurement in battery charging and discharging processes.
2. Motor Control: Precise monitoring of motor currents for control and protection purposes.
3. Power Management: Current sensing in power supplies, converters, and regulators.
4. Energy Monitoring: Measurement of energy consumption in smart meters and energy management systems.
5. Industrial Automation: Current monitoring in industrial machinery and equipment.

Alternative Models

1. INA240A2DR: Similar to the INA240A3DR but with a different pin configuration (SOT-23 package).
2. INA240A4DR: Higher precision version with lower offset voltage and gain error (SOT-23 package).
3. INA240B3DR: Bidirectional current-sensing amplifier with extended temperature range (SOT-23 package).

These alternative models offer similar functionality but may have variations in specifications and package options.

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