INA240A1DR

Product Overview

Category: Integrated Circuit (IC)

Use: The INA240A1DR is a high-precision, low-drift, bidirectional current-sensing amplifier. It is designed to accurately measure small differential voltages across a shunt resistor and convert them into a proportional output voltage. This IC is commonly used in applications where precise current measurements are required, such as power management systems, battery monitoring, motor control, and industrial automation.

Characteristics: - High precision and accuracy - Low drift over temperature - Bidirectional current sensing capability - Wide common-mode voltage range - Low quiescent current consumption - Small package size for space-constrained designs

Package: The INA240A1DR is available in a small SOT-23 package, which is suitable for surface mount applications. This package offers excellent thermal performance and ease of integration into various circuit designs.

Essence: The essence of the INA240A1DR lies in its ability to accurately measure small differential voltages across a shunt resistor, enabling precise current measurements in a wide range of applications.

Packaging/Quantity: The INA240A1DR 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
• Input Common-Mode Voltage Range: -0.3V to +26V
• Output Voltage Swing: Rail-to-Rail
• Gain Error: ±0.25%
• Offset Voltage: ±50µV
• Quiescent Current: 60µA (typical)
• Bandwidth: 350kHz
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The INA240A1DR features a standard 6-pin SOT-23 package with the following pin configuration:

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

Functional Features

• High accuracy and precision current sensing
• Bidirectional current measurement capability
• Wide common-mode voltage range for versatile applications
• Rail-to-rail output swing for maximum signal integrity
• Low quiescent current consumption for power-sensitive designs
• Excellent linearity and low distortion characteristics

Advantages and Disadvantages

Advantages: - High precision and accuracy in current measurements - Wide operating temperature range - Small package size for space-constrained designs - Low quiescent current consumption - Bidirectional current sensing capability

Disadvantages: - Limited bandwidth compared to some other current-sensing amplifiers - Requires an external shunt resistor for current measurement

Working Principles

The INA240A1DR operates based on the principle of measuring the voltage drop across a shunt resistor. It amplifies the small differential voltage across the shunt resistor and provides an output voltage that is proportional to the measured current. By carefully selecting the gain and configuring the input and output connections, precise bidirectional current measurements can be achieved.

Detailed Application Field Plans

The INA240A1DR finds extensive use in various applications, including:

1. Power management systems: Accurate current measurements are crucial for efficient power management, load monitoring, and protection circuits.
2. Battery monitoring: Precise current sensing enables accurate monitoring of battery charging and discharging currents, ensuring optimal battery performance and longevity.
3. Motor control: Current measurements are essential for controlling motor speed, torque, and efficiency in applications such as robotics, electric vehicles, and industrial machinery.
4. Industrial automation: Current sensing plays a vital role in monitoring and controlling the power consumption of industrial equipment, ensuring safe and efficient operation.

Detailed and Complete Alternative Models

• INA240A2DR: Similar to INA240A1DR but with a different gain configuration.
• INA240B1DR: Higher precision version with lower offset voltage and gain error.
• INA240C1DR: Extended temperature range variant for harsh operating environments.
• INA240D1DR: Dual-channel version for simultaneous measurement of two independent currents.

These alternative models offer similar functionality with slight variations in specifications to cater to different application requirements.

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