INA271AQDRQ1 – TEXAS INSTRUMENTS

The INA271AQDRQ1 is a high-side current and voltage monitor from Texas Instruments, packaged in a space-saving 8-lead SOIC (small outline integrated circuit). It operates from a 2.7V to 5.5V supply voltage and measures currents up to ±32A with a maximum voltage of 36V on the high-side. Its key feature is its extremely low quiescent current consumption, typically 270µA, making it suitable for battery-powered applications. The device employs a 0.1Ω shunt resistor for current sensing, enabling precise current measurement with a 1% typical accuracy. Output is provided via a 16-bit I2C serial interface, allowing for easy integration into microcontroller-based systems._x000D_
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The INA271AQDRQ1 offers several advantages over simpler current monitoring solutions. Its high accuracy and wide measurement range minimize the need for external signal conditioning. The I2C interface simplifies system integration, reducing component count and PCB footprint. Furthermore, its low power consumption extends battery life in portable devices. Typical use cases include battery management systems, power supply monitoring, motor control circuits, and solar energy harvesting systems requiring precise and low-noise current and voltage readings in a compact form factor. The device’s ability to handle both positive and negative currents makes it versatile for bidirectional power applications.