INA240A4PWR

Product Overview

Category: Integrated Circuit (IC)

Use: The INA240A4PWR 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 INA240A4PWR 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 temperature range. - 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 INA240A4PWR comes in a small SOT-23 package, allowing for space-efficient integration into various electronic systems. - Packaging/Quantity: The INA240A4PWR is typically available in reels of 2500 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
• Temperature Drift: 0.5µV/°C
• Bandwidth: 350kHz
• Quiescent Current: 60µA

Pin Configuration

The INA240A4PWR has the following pin configuration:

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

Functional Features

• High accuracy current sensing: The INA240A4PWR provides precise measurement of bidirectional currents with minimal errors.
• Wide supply voltage range: It can operate from 2.7V to 5.5V, making it compatible with a variety of power sources.
• Low quiescent current: With a quiescent current of only 60µA, the amplifier minimizes power consumption in battery-powered applications.
• Overload protection: The device includes built-in protection features to prevent damage from excessive currents or voltages.

Advantages and Disadvantages

Advantages: - Accurate bidirectional current sensing - Low drift and high precision - Small package size for space-constrained designs - Wide supply voltage range

Disadvantages: - Limited bandwidth compared to some other current-sensing amplifiers - Higher cost compared to less precise alternatives

Working Principles

The INA240A4PWR utilizes a differential amplifier configuration to measure the voltage drop across a shunt resistor connected in series with the current path. By amplifying this voltage, it accurately represents the current flowing through the shunt resistor. The bidirectional nature of the amplifier allows it to handle both positive and negative currents.

Application Field Plans

The INA240A4PWR finds application in various fields, including:

1. Battery monitoring systems: It enables accurate measurement of charging and discharging currents in battery management systems, ensuring optimal performance and safety.
2. Motor control: The amplifier facilitates precise current sensing in motor control circuits, enabling efficient control and protection mechanisms.
3. Power supplies: It can be used in power supply circuits to monitor current flow and protect against overloads or short circuits.
4. Energy management systems: The INA240A4PWR aids in monitoring energy consumption in smart grid systems, helping optimize energy usage and identify faults.

Alternative Models

Some alternative models that offer similar functionality to the INA240A4PWR include:

1. INA219: This IC provides high-precision current and voltage measurement with an I2C interface for easy integration into digital systems.
2. ACS712: It is a Hall-effect-based current sensor module that offers bidirectional current sensing and is available in various current ranges.
3. MAX4080: This amplifier features a wide supply voltage range and low offset voltage, making it suitable for precision current measurements.

These alternative models can be considered based on specific application requirements and cost considerations.

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