INA2181A3IDGST

Product Overview

Category: Integrated Circuit (IC)

Use: The INA2181A3IDGST 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 monitoring, motor control, and energy harvesting.

Characteristics: - High precision: The INA2181A3IDGST offers excellent accuracy in current sensing, with a typical gain error of only ±0.5%. - Low power consumption: It operates at a low supply voltage range of 2.7V to 5.5V, making it suitable for battery-powered devices. - Bidirectional current sensing: The device can measure both positive and negative currents accurately. - Wide input common-mode voltage range: It can handle input voltages from -0.2V to +26V, allowing flexibility in different applications. - Small package size: The INA2181A3IDGST comes in a compact 8-pin VSSOP package, which saves board space and enables easy integration into designs.

Package/Quantity: The INA2181A3IDGST is available in a VSSOP-8 package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Input Common-Mode Voltage Range: -0.2V to +26V
• Gain Error: ±0.5%
• Bandwidth: 200 kHz
• Quiescent Current: 60 µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The INA2181A3IDGST has the following pin configuration:

```

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| | | 1 2 | | | | 3 4 | | | | 5 6 | |___________|

1. V- (Negative Power Supply)
2. IN- (Negative Current Sense Input)
3. REF- (Reference Voltage Input)
4. OUT (Amplifier Output)
5. REF+ (Reference Voltage Output)
6. IN+ (Positive Current Sense Input)
7. V+ (Positive Power Supply)
8. GND (Ground) ```

Functional Features

The INA2181A3IDGST offers the following functional features:

• High accuracy current sensing: It provides precise measurement of bidirectional currents with low gain error.
• Wide input voltage range: The device can handle a wide range of input voltages, allowing flexibility in various applications.
• Low power consumption: It operates at a low quiescent current, making it suitable for battery-powered devices.
• Small package size: The compact package enables easy integration into space-constrained designs.

Advantages and Disadvantages

Advantages: - High precision current sensing - Wide input voltage range - Low power consumption - Compact package size

Disadvantages: - Limited bandwidth compared to some other current-sensing amplifiers - Not suitable for high-frequency applications

Working Principles

The INA2181A3IDGST is based on the principle of current shunt measurement. It utilizes a precision amplifier to measure the voltage drop across a shunt resistor connected in series with the load. By accurately amplifying this voltage, the device provides an accurate representation of the current flowing through the load.

Application Field Plans

The INA2181A3IDGST finds applications in various fields, including:

1. Power management systems: It enables accurate current monitoring in power supplies, helping optimize efficiency and prevent overloading.
2. Battery monitoring: The device allows precise measurement of current in battery charging and discharging processes, aiding in battery management and protection.
3. Motor control: It facilitates accurate current sensing in motor control applications, enabling efficient control and protection mechanisms.
4. Energy harvesting: The INA2181A3IDGST can be used to monitor the current generated by energy harvesting systems, ensuring optimal power extraction.

Alternative Models

Here are some alternative models that offer similar functionality:

1. INA219: This IC provides high-precision current and voltage monitoring with an I2C interface for easy integration into digital systems.
2. MAX4080: It is a bidirectional, high-side, current-sense amplifier with a wide input voltage range and low quiescent current.
3. LTC6101: This current sense amplifier offers high accuracy and operates at a higher bandwidth suitable for high-frequency applications.

These alternative models provide options based on specific requirements and design considerations.

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