INA240A1D

Product Overview

Category: Integrated Circuit (IC)

Use: The INA240A1D is a high-precision, low-drift, bidirectional current-sensing amplifier. It is designed to accurately measure both positive and negative currents in a wide range of applications.

Characteristics: - High precision: The INA240A1D offers exceptional accuracy with a maximum offset voltage of 50µV and a gain error as low as 0.1%. - Low drift: It exhibits minimal drift over temperature, ensuring reliable and stable measurements. - Bidirectional sensing: The device can measure both positive and negative currents, making it suitable for applications requiring bi-directional current monitoring. - Wide input voltage range: With a common-mode voltage range of -0.3V to +26V, the INA240A1D can handle a variety of input voltages. - Small package: It comes in a compact SOT-23 package, allowing for easy integration into space-constrained designs.

Essence: The INA240A1D is an essential component for accurate current measurement in various electronic systems. Its high precision, low drift, and bidirectional sensing capabilities make it ideal for applications such as battery management, motor control, power supplies, and industrial automation.

Packaging/Quantity: The INA240A1D is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Input Common-Mode Voltage Range: -0.3V to +26V
• Gain Error: ±0.1%
• Offset Voltage: ±50µV
• Bandwidth: 350kHz
• Quiescent Current: 60µA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The INA240A1D features a 6-pin SOT-23 package with the following pin configuration:

1. V+ (Positive Supply Voltage)
2. V- (Negative Supply Voltage)
3. OUT (Output)
4. REF (Reference Voltage)
5. IN- (Inverting Input)
6. IN+ (Non-Inverting Input)

Functional Features

• High accuracy current sensing: The INA240A1D provides precise current measurements with minimal errors, ensuring reliable data for critical applications.
• Bidirectional current measurement: It can accurately measure both positive and negative currents, allowing for versatile monitoring in systems that require bi-directional current sensing.
• Low drift over temperature: The device exhibits minimal drift over a wide temperature range, maintaining accurate measurements even in varying environmental conditions.
• Wide input voltage range: With its broad common-mode voltage range, the INA240A1D can handle a wide variety of input voltages, making it suitable for diverse applications.

Advantages and Disadvantages

Advantages: - High precision and low drift ensure accurate current measurements. - Bidirectional sensing capability allows for versatile current monitoring. - Compact package enables easy integration into space-constrained designs. - Wide input voltage range accommodates various applications.

Disadvantages: - Limited bandwidth may not be suitable for high-frequency current measurements. - Requires external power supply for operation.

Working Principles

The INA240A1D utilizes a differential amplifier architecture to measure current. It amplifies the voltage difference between the IN+ and IN- pins, which are connected across a shunt resistor in series with the current path. The amplified voltage is then converted into a proportional output current through a feedback network. By measuring this output current, the actual current flowing through the shunt resistor can be accurately determined.

Detailed Application Field Plans

The INA240A1D finds application in various fields, including:

1. Battery Management Systems: It enables precise monitoring of charging and discharging currents in battery packs, ensuring optimal performance and safety.
2. Motor Control: The INA240A1D facilitates accurate current sensing in motor control systems, allowing for efficient control and protection.
3. Power Supplies: It provides reliable current measurements in power supply circuits, aiding in load monitoring and fault detection.
4. Industrial Automation: The device is suitable for current monitoring in industrial automation applications, such as robotics, process control, and equipment monitoring.

Detailed and Complete Alternative Models

1. INA219: This IC offers similar functionality to the INA240A1D but with a higher voltage range and an I2C interface for communication.
2. ACS712: A Hall-effect-based current sensor that provides galvanic isolation and high accuracy in current measurements.
3. MAX4080: This precision current-sense amplifier offers a wide input voltage range and low offset voltage for accurate current sensing.

These alternative models can be considered based on specific application requirements and design constraints.

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