INA2181A2QDGSRQ1

Product Overview

Category: Integrated Circuit (IC)

Use: The INA2181A2QDGSRQ1 is a high-precision, low-power, bidirectional current-sensing amplifier. It is specifically designed for automotive applications.

Characteristics: - High precision: The INA2181A2QDGSRQ1 offers excellent accuracy in measuring current with a maximum offset voltage of 50µV. - Low power consumption: It operates at a low supply current of 350µA, making it suitable for battery-powered systems. - Bidirectional sensing: The amplifier can measure both positive and negative currents accurately. - Automotive-grade: The INA2181A2QDGSRQ1 is qualified for automotive applications, ensuring reliability and durability in harsh environments.

Package: The INA2181A2QDGSRQ1 comes in a small 10-pin VSSOP package, which allows for space-efficient PCB layout.

Essence: The essence of the INA2181A2QDGSRQ1 lies in its ability to accurately sense bidirectional currents in automotive applications while consuming minimal power.

Packaging/Quantity: The INA2181A2QDGSRQ1 is typically available in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Common-Mode Voltage Range: -0.2V to +26V
• Input Offset Voltage: ±50µV (maximum)
• Gain Error: ±0.5% (maximum)
• Bandwidth: 100kHz (typical)
• Quiescent Current: 350µA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The INA2181A2QDGSRQ1 has the following pin configuration:

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

Functional Features

The key functional features of the INA2181A2QDGSRQ1 include:

• High accuracy current sensing: The amplifier provides precise measurement of bidirectional currents, enabling accurate monitoring and control in automotive systems.
• Low power consumption: With a low quiescent current, it minimizes power consumption, making it suitable for battery-powered applications.
• Wide common-mode voltage range: The INA2181A2QDGSRQ1 can handle a wide range of common-mode voltages, allowing flexibility in various automotive circuits.
• Rail-to-rail output swing: It offers an output swing that reaches close to the supply rails, maximizing dynamic range.

Advantages and Disadvantages

Advantages: - High precision current sensing - Low power consumption - Automotive-grade reliability - Small package size for space-efficient designs - Bidirectional current measurement capability

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

Working Principles

The INA2181A2QDGSRQ1 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. The bidirectional current sensing capability allows it to accurately measure both positive and negative currents.

Detailed Application Field Plans

The INA2181A2QDGSRQ1 finds applications in various automotive systems, including:

1. Battery management systems: It enables accurate monitoring of battery charging and discharging currents.
2. Motor control: The amplifier can be used to measure motor currents for precise control and protection.
3. Power distribution systems: It provides current sensing capabilities for efficient power distribution and fault detection.
4. Electric vehicle charging stations: The INA2181A2QDGSRQ1 ensures accurate measurement of charging currents.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the INA2181A2QDGSRQ1 include:

1. INA210-Q1: A high-precision, bidirectional current-sensing amplifier designed for automotive applications.
2. MAX4080SASA+: A low-power, precision current-sense amplifier with a wide supply voltage range.
3. LTC6101HVHS5#PBF: A high-voltage, high-side current sense amplifier suitable for automotive and industrial applications.

These alternatives provide options based on specific requirements and design considerations.

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