INA2181A4QDGSRQ1

Product Overview

Category: Integrated Circuit (IC)

Use: The INA2181A4QDGSRQ1 is a precision, low-power, bidirectional current-sensing IC designed for automotive applications. It provides accurate measurement of current flowing in both directions with high common-mode voltage rejection.

Characteristics: - Precision current sensing - Low power consumption - Bidirectional current measurement - High common-mode voltage rejection

Package: The INA2181A4QDGSRQ1 is available in a small 14-pin VSSOP package, which offers space-saving advantages and ease of integration into automotive electronic systems.

Essence: The essence of the INA2181A4QDGSRQ1 lies in its ability to accurately measure bidirectional currents in automotive applications while maintaining high common-mode voltage rejection.

Packaging/Quantity: The INA2181A4QDGSRQ1 is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +125°C
• Common-Mode Voltage Range: -0.3V to +26V
• Input Offset Voltage: ±150µV (maximum)
• Gain Error: ±0.5% (maximum)
• Bandwidth: 200kHz (typical)
• Quiescent Current: 60µA (typical)

Pin Configuration

The INA2181A4QDGSRQ1 has a total of 14 pins. The pin configuration is as follows:

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| | | 1 2 3 4 5 6 7 8 9 | |_______________________________________| | | | 14 13 12 11 10 | |_______________________________________| ```

Functional Features

• Bidirectional current sensing: The INA2181A4QDGSRQ1 can accurately measure current flowing in both directions, making it suitable for applications where bidirectional current monitoring is required.
• High common-mode voltage rejection: The IC provides excellent common-mode voltage rejection, allowing accurate measurement even in the presence of high common-mode voltages.
• Low power consumption: With a quiescent current of only 60µA, the INA2181A4QDGSRQ1 minimizes power consumption, making it ideal for battery-powered automotive systems.

Advantages and Disadvantages

Advantages: - Accurate bidirectional current sensing - High common-mode voltage rejection - Low power consumption - Small package size for space-saving integration

Disadvantages: - Limited bandwidth (200kHz)

Working Principles

The INA2181A4QDGSRQ1 utilizes a precision amplifier and a shunt resistor to measure the voltage drop across the shunt resistor, which is proportional to the current flowing through it. The IC amplifies this voltage drop and provides an output voltage that represents the measured current. By using a bidirectional current-sensing architecture, the INA2181A4QDGSRQ1 can accurately measure currents flowing in both directions.

Detailed Application Field Plans

The INA2181A4QDGSRQ1 is specifically designed for automotive applications that require precise bidirectional current sensing. Some potential application fields include:

1. Electric vehicle powertrain systems: The IC can be used to monitor the current flowing into and out of the electric motor, enabling efficient control and management of the powertrain system.
2. Battery management systems: By measuring the current flowing into and out of the battery pack, the INA2181A4QDGSRQ1 can assist in monitoring the state of charge and ensuring optimal battery performance.
3. Power distribution systems: The IC can be employed to monitor current flow in various power distribution systems within the vehicle, such as lighting circuits, HVAC systems, and infotainment systems.

Detailed and Complete Alternative Models

• INA210-Q1
• INA213-Q1
• INA216-Q1
• INA219-Q1
• INA220-Q1

These alternative models offer similar functionality and are suitable replacements for the INA2181A4QDGSRQ1 in automotive applications.

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