INA2181A2IDGSR

Product Overview

Category: Integrated Circuit (IC)

Use: The INA2181A2IDGSR is a high-precision, low-power, bidirectional current-sensing amplifier. It is designed for use in various applications that require accurate current measurements, such as power management systems, battery chargers, motor control, and energy monitoring.

Characteristics: - High precision: The INA2181A2IDGSR offers excellent accuracy in measuring current, with a typical gain error of only ±0.5%. - Low power consumption: It operates at a very low quiescent current of 60µA, making it suitable for battery-powered devices. - Bidirectional sensing: The device can measure both positive and negative currents, allowing for versatile current monitoring. - Wide input voltage range: It can handle input voltages ranging from -16V to +80V, providing flexibility in various applications.

Package: The INA2181A2IDGSR is available in a small and compact VSSOP-8 package, which ensures easy integration into space-constrained designs.

Essence: This IC's essence lies in its ability to accurately sense bidirectional currents while consuming minimal power, making it an ideal choice for applications requiring precise current measurements.

Packaging/Quantity: The INA2181A2IDGSR is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Quiescent Current: 60µA (typical)
• Gain Error: ±0.5% (typical)
• Input Common-Mode Voltage Range: -16V to +80V
• Bandwidth: 200kHz (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The INA2181A2IDGSR features the following pin configuration:

___________ V+ | | OUT ---->| |<---- | | IN+ | | REF ---->| |<---- | | IN- | | GND ---->| |<---- |___________|

Functional Features

• High accuracy current sensing: The INA2181A2IDGSR provides precise current measurements with low gain error, ensuring reliable monitoring of currents in various applications.
• Bidirectional current sensing: It can accurately measure both positive and negative currents, making it suitable for applications requiring bi-directional current monitoring.
• Low power consumption: With its low quiescent current, the device minimizes power consumption, extending battery life in portable devices.
• Wide input voltage range: The INA2181A2IDGSR can handle a wide range of input voltages, allowing for versatile use in different systems.

Advantages and Disadvantages

Advantages: - High precision current sensing - Bidirectional current measurement capability - Low power consumption - Wide input voltage range

Disadvantages: - Limited bandwidth compared to some other current-sensing amplifiers - Availability in only one package option (VSSOP-8)

Working Principles

The INA2181A2IDGSR operates based on the principle of measuring the voltage drop across a shunt resistor placed in series with the current path. It amplifies this voltage drop and provides an output proportional to the sensed current. By carefully controlling the gain and offset, the device achieves high accuracy in current measurements.

Detailed Application Field Plans

The INA2181A2IDGSR finds application in various fields, including: 1. Power management systems: It enables accurate current monitoring in power supplies, helping optimize power efficiency and protect against overcurrent conditions. 2. Battery chargers: The device allows precise measurement of charging and discharging currents, ensuring safe and efficient battery management. 3. Motor control: It enables accurate current sensing in motor control circuits, facilitating precise control and protection against overload conditions. 4. Energy monitoring: The INA2181A2IDGSR can be used in energy monitoring systems to measure current consumption in appliances, enabling energy-efficient usage.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the INA2181A2IDGSR include: - INA219: This IC provides high-precision current and voltage measurements with an integrated ADC for easy interfacing with microcontrollers. - ACS712: A Hall-effect-based current sensor that offers bidirectional current sensing and a wide range of current measurement options. - MAX4080: A precision current-sense amplifier with low offset and drift, suitable for high-accuracy current measurements.

These alternative models can be considered based on specific application requirements and design constraints.

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