INA293B1QDBVRQ1 Automotive, Precision, Low-/High-Side Measurement, Bi-Directional, Zero-Drift Current Sense Amplifier

The INA293B1QDBVRQ1 from Texas Instruments is a high-precision current sense amplifier that is designed for a wide range of automotive and industrial applications. It is capable of bi-directional current sensing on both low-side and high-side configurations, making it an incredibly versatile component for monitoring battery management systems, motor controls, power-supply controls, and overcurrent protection circuits.

This current sense amplifier is part of the zero-drift series, which means it offers a very low input offset voltage that is eliminated through auto-zeroing techniques, ensuring high accuracy over time and temperature. The INA293B1QDBVRQ1 is designed to work with common-mode voltages that range from -14V to +80V, and it can detect voltage differentials as low as 10µV, which is ideal for sensing small currents with high accuracy.

The device is offered in a compact SOT-23 package, which is suitable for space-constrained applications. Its operating temperature range of -40°C to +125°C allows for reliable performance in harsh environments, a critical feature for automotive and industrial systems. The INA293B1QDBVRQ1 also features an extended common-mode rejection ratio (CMRR) of 120 dB (min) at DC, which is essential for reducing the effects of unwanted signals and noise.

As an automotive-qualified product, the INA293B1QDBVRQ1 meets the stringent requirements of the AEC-Q100 standard, ensuring robustness and reliability for automotive applications. Its bi-directional sensing capability enables it to measure current in both charging and discharging states of a battery, which is particularly useful for electric vehicle (EV) battery management systems.

Overall, the INA293B1QDBVRQ1 is a high-performance solution for precise current measurement. With its zero-drift architecture, wide input common-mode voltage range, and robust design, it stands out as an excellent choice for engineers looking to enhance the accuracy and reliability of their current sensing applications.