INA303A1IPW

Product Overview

Category: Integrated Circuit (IC)

Use: The INA303A1IPW is a precision, low-power, bidirectional current-sensing amplifier. It is designed for use in applications that require accurate measurement of current flowing in both directions.

Characteristics: - Precision: The INA303A1IPW offers high accuracy with a maximum offset voltage of 50µV and a gain error of only 0.5%. - Low Power: This IC operates at a low supply voltage range of 2.7V to 5.5V, making it suitable for battery-powered devices. - Bidirectional Sensing: It can measure current flow in both directions, allowing for versatile applications. - Small Package: The INA303A1IPW comes in a small SOT-23 package, which makes it ideal for space-constrained designs. - Packaging/Quantity: It is available in tape and reel packaging, with a quantity of 3000 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Input Common-Mode Voltage Range: -0.2V to +26V
• Gain Error: 0.5%
• Offset Voltage: 50µV (maximum)
• Bandwidth: 100kHz
• Quiescent Current: 60µA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The INA303A1IPW has the following pin configuration:

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| | --| V+ OUT |-- --| VIN- GND |-- --| VIN+ REF |-- --| V- NC |-- |___________| ```

• V+: Positive supply voltage
• OUT: Amplifier output
• VIN-: Negative input voltage
• GND: Ground reference
• VIN+: Positive input voltage
• REF: Reference voltage
• V-: Negative supply voltage
• NC: No connection

Functional Features

The INA303A1IPW offers the following functional features:

1. Bidirectional Current Sensing: It accurately measures current flow in both directions, allowing for versatile applications such as battery monitoring, motor control, and power management.
2. High Accuracy: With a low offset voltage and gain error, this IC provides precise current measurements.
3. Low Power Consumption: The INA303A1IPW operates at a low quiescent current, making it suitable for power-sensitive applications.
4. Wide Supply Voltage Range: It can be powered by a range of supply voltages, providing flexibility in various system designs.
5. Small Package Size: The SOT-23 package enables space-saving integration into compact electronic devices.

Advantages and Disadvantages

Advantages: - Accurate bidirectional current sensing - Low power consumption - Wide supply voltage range - Small package size

Disadvantages: - Limited bandwidth (100kHz)

Working Principles

The INA303A1IPW utilizes a precision amplifier to measure the voltage across a shunt resistor connected in series with the current path. By amplifying this voltage, it accurately represents the current flowing through the circuit. The bidirectional capability allows for monitoring current flow in both directions, enabling efficient control and protection in various applications.

Application Field Plans

The INA303A1IPW finds application in various fields, including but not limited to:

1. Battery Monitoring: Accurate current measurement helps monitor battery charging and discharging, enabling efficient utilization and prolonging battery life.
2. Motor Control: Precise current sensing aids in controlling motor speed, torque, and direction, ensuring optimal performance and protection against overload conditions.
3. Power Management: The IC facilitates power monitoring in systems, enabling efficient energy management and fault detection.
4. Industrial Automation: Current sensing is crucial in industrial automation applications for monitoring and controlling electrical loads.

Alternative Models

1. INA303A2IPW: Similar to the INA303A1IPW, but with a higher gain error of 1%.
2. INA303B1IPW: Offers bidirectional current sensing with a wider bandwidth of 200kHz.
3. INA303C1IPW: Provides higher accuracy with a maximum offset voltage of 25µV.

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

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