INA190-Q1

The INA190-Q1 is a high-precision, low-side current shunt monitor from Texas Instruments designed for automotive and industrial applications. It features a wide supply voltage range of 2.7 V to 5.5 V, making it suitable for various power systems. The device offers a very low offset voltage of 30 μV (max), ensuring accurate current sensing even at low currents. Its input common-mode voltage range extends from 0 V to the supply voltage, enabling robust performance in high-side and low-side configurations. This integrated circuit includes a differential amplifier with a fixed gain of 20 V/V, which amplifies the small voltage drop across a shunt resistor. The output is rail-to-rail, allowing full utilization of the output voltage range for precise signal conditioning. With a bandwidth of 400 kHz, the INA190-Q1 supports fast response times necessary for dynamic load monitoring in modern electronic systems. Designed for reliability in harsh environments, the INA190-Q1 meets AEC-Q100 Grade 1 qualification, making it ideal for automotive applications such as battery management systems, motor control, and powertrain diagnostics. It operates over a temperature range of –40°C to +125°C, ensuring stable performance under extreme thermal conditions. The device also includes built-in protection features like overvoltage protection on the input pins and ESD protection, enhancing system robustness. Its compact 5-pin SOIC package provides efficient board space utilization while maintaining excellent thermal performance. The INA190-Q1 consumes only 800 μA of quiescent current, contributing to energy-efficient designs in battery-powered systems. In addition to its core current-sensing functionality, the INA190-Q1 can be used in conjunction with microcontrollers or analog-to-digital converters (ADCs) to enable real-time current monitoring and fault detection. Its high precision and low drift make it suitable for applications requiring long-term stability, such as electric vehicle charging systems and industrial automation equipment.