Overview of INA181A1IDBVR Current-Sense Amplifier

The INA181A1IDBVR is a high-precision current-sense amplifier from Texas Instruments, designed to monitor voltage drops across shunt resistors over a wide common-mode range. It is an essential component for power management applications that require accurate current measurement, such as battery chargers, power supplies, and motor controls.

Key Features

• Wide Common-Mode Range: The INA181A1IDBVR operates over a common-mode voltage range from -0.2 V to +26 V, making it suitable for both low-side and high-side current sensing in systems with a wide range of supply voltages.
• High Accuracy: With its precision design, the INA181A1IDBVR offers an accuracy of 1% max over the full temperature range (-40°C to +125°C), ensuring reliable current measurements in various conditions.
• Low Quiescent Current: The device consumes a low quiescent current of 260 µA (typical), which is critical for power-sensitive applications.
• Gain Options: The INA181 series includes multiple gain options to accommodate different application requirements. This particular model, INA181A1IDBVR, has a fixed gain of 20 V/V.
• Small Package: Housed in a SOT-23 package, the INA181A1IDBVR is optimized for space-constrained applications.

Applications

The INA181A1IDBVR is versatile and can be employed in a variety of applications, including:

• Power management systems
• Battery chargers
• Energy meters
• Overcurrent protection
• Portable devices
• Automotive systems

Technical Specifications

• Input Offset Voltage: 250 µV (max)
• Common-Mode Rejection Ratio (CMRR): 112 dB (min)
• Operating Temperature Range: -40°C to +125°C
• Supply Voltage: 2.7 V to 5.5 V
• Bandwidth: 350 kHz (typical)

The INA181A1IDBVR from Texas Instruments is a robust and reliable choice for designers looking to enhance the accuracy and efficiency of their current sensing solutions. Its combination of high accuracy, low power consumption, and a compact form factor make it an excellent choice for a wide range of applications.