INA2181A1QDGSRQ1

Product Overview

Category: Integrated Circuit (IC)

Use: The INA2181A1QDGSRQ1 is a high-precision, low-power, bidirectional current-sensing amplifier designed for automotive applications. It is specifically used for monitoring and measuring current in battery management systems, motor control, and power management circuits.

Characteristics: - High precision: The INA2181A1QDGSRQ1 offers excellent accuracy in current measurement, making it suitable for critical automotive applications. - Low power consumption: It operates at low power levels, ensuring minimal impact on the overall power consumption of the system. - Bidirectional sensing: The amplifier can measure both positive and negative currents, allowing for versatile current monitoring capabilities. - Automotive-grade: This IC is designed to meet the stringent requirements of the automotive industry, including temperature range, reliability, and safety standards.

Package: The INA2181A1QDGSRQ1 is available in a small-sized VSSOP-10 package, which provides space-saving benefits and ease of integration into compact automotive electronic systems.

Essence: The essence of the INA2181A1QDGSRQ1 lies in its ability to accurately sense and measure bidirectional currents in automotive applications, enabling precise monitoring and control of power systems.

Packaging/Quantity: The INA2181A1QDGSRQ1 is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Input Common-Mode Voltage Range: -0.3V to +26V
• Gain Error: ±0.5%
• Offset Voltage: ±100µV
• Bandwidth: 200kHz
• Quiescent Current: 60µA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The INA2181A1QDGSRQ1 has the following pin configuration:

1. V+ (Positive Supply Voltage)
2. V- (Negative Supply Voltage)
3. IN+ (Positive Current Sense Input)
4. IN- (Negative Current Sense Input)
5. REF (Reference Voltage)
6. OUT (Amplifier Output)
7. SET (Gain Setting)
8. NC (No Connection)
9. GND (Ground)
10. NC (No Connection)

Functional Features

• High accuracy current sensing: The INA2181A1QDGSRQ1 provides precise current measurement with low gain error and offset voltage, ensuring accurate monitoring of currents in automotive systems.
• Bidirectional current sensing: It can measure both positive and negative currents, allowing for versatile applications in bidirectional power systems.
• Low power consumption: The IC operates at a low quiescent current, minimizing power dissipation and maximizing energy efficiency.
• Wide supply voltage range: It can operate within a wide voltage range, making it compatible with various automotive power supply systems.
• Robust design: The INA2181A1QDGSRQ1 is designed to withstand harsh automotive environments, including temperature variations, electromagnetic interference, and voltage transients.

Advantages and Disadvantages

Advantages: - High precision current sensing - Bidirectional current measurement capability - Low power consumption - Automotive-grade reliability - Compact package size

Disadvantages: - Limited bandwidth compared to some other current-sensing amplifiers - Higher cost compared to less precise alternatives

Working Principles

The INA2181A1QDGSRQ1 utilizes a differential amplifier architecture to sense and amplify the voltage across a shunt resistor connected in series with the current path. This amplified voltage is then converted into a proportional current output. The gain of the amplifier can be set using an external resistor connected to the SET pin.

Detailed Application Field Plans

The INA2181A1QDGSRQ1 finds extensive application in various automotive systems, including: - Battery management systems - Motor control circuits - Power management systems - Electric vehicle charging stations - Energy storage systems

In battery management systems, it enables accurate monitoring of charging and discharging currents, ensuring optimal battery performance and safety. In motor control circuits, it facilitates precise current control for efficient motor operation. In power management systems, it assists in monitoring and controlling power consumption, contributing to energy efficiency.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the INA2181A1QDGSRQ1 include: - INA219: This IC provides higher bandwidth and additional features such as voltage measurement along with current sensing. - ACS712: It is a Hall-effect-based current sensor offering a different sensing principle compared to the INA2181A1QDGSRQ1. - MAX4080: This amplifier offers higher precision and lower offset voltage but operates at a higher supply voltage range.