INA302-Q1

The INA302-Q1 is a high-precision, low-side current shunt monitor from Texas Instruments designed for automotive and industrial applications requiring accurate current measurement. It features a wide supply voltage range of 2.7 V to 5.5 V, enabling compatibility with various power systems. The device offers a gain of 50 V/V, allowing it to sense small voltage drops across a current-sensing resistor with high resolution and minimal signal loss. This IC incorporates a rail-to-rail output stage that ensures full-scale output swing within the supply rails, making it suitable for use in systems with tight voltage headroom constraints. Its input common-mode range extends down to 0 V, enabling true low-side sensing without the need for complex biasing circuits. The INA302-Q1 also includes an integrated shutdown mode that reduces quiescent current to less than 1 µA, enhancing power efficiency in battery-powered or energy-sensitive designs. Designed for robust performance in harsh environments, the INA302-Q1 meets AEC-Q100 Grade 1 qualification standards, ensuring reliability under extreme temperature conditions (-40°C to +125°C). It operates with a maximum offset voltage of 50 µV and a low drift of 0.2 µV/°C, delivering stable and precise measurements over time and temperature variations. The device supports both single-supply and dual-supply configurations, offering flexibility in system design. Its compact 3-pin SOT-23 package makes it ideal for space-constrained applications such as motor control, battery management systems, and power supplies. The INA302-Q1 is particularly well-suited for monitoring currents in electric vehicle (EV) charging systems, DC-DC converters, and powertrain components where accuracy, reliability, and thermal stability are critical. With built-in protection features including overvoltage and ESD protection, the INA302-Q1 enhances system robustness against transient events commonly found in automotive and industrial environments. Its ability to interface directly with microcontrollers or analog-to-digital converters (ADCs) simplifies integration into existing control architectures. This combination of precision, durability, and ease of implementation positions the INA302-Q1 as a preferred solution for current sensing in demanding applications.