INA240A3PW

Product Overview

Category: Integrated Circuit (IC)

Use: The INA240A3PW is a precision, low-power, bidirectional current-sensing amplifier. It is designed for use in applications that require accurate measurement of both positive and negative currents.

Characteristics: - High accuracy - Low power consumption - Bidirectional current sensing - Wide common-mode voltage range - Small package size

Package: The INA240A3PW is available in a small 8-pin TSSOP package, which allows for easy integration into space-constrained designs.

Essence: The essence of the INA240A3PW lies in its ability to accurately measure bidirectional currents with high precision and low power consumption.

Packaging/Quantity: The INA240A3PW is typically sold in reels or tubes containing a specified quantity of ICs, depending on the manufacturer's packaging standards.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Common-Mode Voltage Range: -0.1V to +26V
• Input Offset Voltage: ±150µV (maximum)
• Gain Error: ±0.25% (maximum)
• Bandwidth: 350kHz (typical)
• Quiescent Current: 60µA (typical)

Pin Configuration

The INA240A3PW has the following pin configuration:

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Functional Features

• Bidirectional current sensing: The INA240A3PW can accurately measure both positive and negative currents, making it suitable for applications such as battery monitoring and motor control.
• High accuracy: With a maximum gain error of ±0.25%, the INA240A3PW provides precise current measurements.
• Wide common-mode voltage range: The device can operate with a common-mode voltage range of -0.1V to +26V, allowing for flexibility in various applications.
• Low power consumption: The quiescent current of only 60µA ensures minimal power consumption, making it ideal for battery-powered devices.

Advantages and Disadvantages

Advantages: - Accurate bidirectional current sensing - Wide common-mode voltage range - Low power consumption - Small package size for space-constrained designs

Disadvantages: - Limited bandwidth compared to some other current-sensing amplifiers - Higher input offset voltage compared to certain precision amplifiers

Working Principles

The INA240A3PW utilizes a differential amplifier configuration to measure the voltage drop across a shunt resistor connected in series with the current being sensed. This voltage is then amplified and converted into a proportional output voltage. By carefully controlling the gain and offset of the amplifier, accurate bidirectional current measurements can be achieved.

Detailed Application Field Plans

The INA240A3PW finds application in various fields, including but not limited to: - Battery monitoring systems - Motor control - Power management - Energy harvesting systems - Industrial automation

Detailed and Complete Alternative Models

• INA219: Similar bidirectional current-sensing amplifier with higher bandwidth and lower input offset voltage.
• INA226: Precision, bidirectional current and power monitor with additional features such as integrated shunt voltage and bus voltage measurement.

These alternative models offer different trade-offs in terms of performance and features, allowing designers to choose the most suitable option for their specific application requirements.

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