Overview
The INA2181A4IDSQR is a high-precision, bidirectional current sense amplifier produced by Texas Instruments. Designed for cost-optimized solutions, this component is part of the INAx181 series, which is widely used in industrial and commercial applications. Its primary function is to accurately measure current across a shunt resistor, independent of the supply voltage. The INA2181A4IDSQR is particularly suitable for applications requiring high accuracy and low power consumption, such as power management, battery monitoring, and motor control systems.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Common Mode Voltage Range | -0.2 to +26 | V | Bidirectional |
| Gain | 200 | V/V | Fixed |
| Bandwidth | 350 | kHz | Typical |
| Supply Voltage | 2.7 to 5.5 | V | Single supply |
| Quiescent Current | 500 | µA | Max |
| Operating Temperature | -40 to +125 | °C | Extended range |
| Package | VSSOP-10 | - | Surface mount |
Key Features
- Bidirectional current sensing capability.
- High accuracy with ±1% maximum gain error.
- Low offset voltage of ±150µV at VCM = 0V.
- Wide common-mode voltage range (-0.2V to +26V).
- Low quiescent current for power-sensitive applications.
- Integrated matched resistor gain network for reduced error.
Applications
The INA2181A4IDSQR is ideal for a variety of applications, including power management systems, battery monitoring in portable devices, and motor control in industrial automation. Its high accuracy and bidirectional current sensing make it particularly useful in automotive electronics for monitoring battery health and current flow. Additionally, it is employed in consumer electronics for efficient power consumption management.
Q & A
1. What is the gain of the INA2181A4IDSQR?
The gain is fixed at 200 V/V.
2. What is the common-mode voltage range?
The range is from -0.2V to +26V.
3. What is the operating temperature range?
It operates from -40°C to +125°C.
4. What package does the INA2181A4IDSQR come in?
It is available in a VSSOP-10 package.
5. Is the INA2181A4IDSQR suitable for bidirectional current sensing?
Yes, it supports bidirectional current sensing.
6. What is the maximum quiescent current?
The maximum quiescent current is 500 µA.
7. What is the bandwidth of the amplifier?
The typical bandwidth is 350 kHz.
8. Can it be used in automotive applications?
Yes, it is suitable for automotive electronics, particularly for battery monitoring.
9. What is the supply voltage range?
The supply voltage range is 2.7V to 5.5V.
10. What is the offset voltage at VCM = 0V?
The offset voltage is ±150µV at VCM = 0V.
