INA229-Q1

The INA229-Q1 is a high-precision, low-power current and power monitor from Texas Instruments designed for automotive and industrial applications. It features a 16-bit delta-sigma ADC with programmable gain amplifiers (PGAs) that enable accurate measurement of currents as low as 50 µA up to 30 A, making it suitable for both high-side and low-side sensing configurations. The device supports supply voltages ranging from 2.7 V to 5.5 V, ensuring compatibility with a wide range of systems, including those using 3.3 V or 5 V logic. This device offers integrated voltage and current measurement capabilities, allowing direct calculation of power consumption with a resolution of 1 µW. Its built-in digital filtering and configurable data rate options reduce noise and improve accuracy in electrically noisy environments such as automotive battery systems or motor control circuits. Additionally, the INA229-Q1 includes an I²C-compatible serial interface for easy integration into embedded systems, enabling communication with microcontrollers or processors without requiring additional hardware. Designed for robust performance under harsh conditions, the INA229-Q1 meets AEC-Q100 Grade 1 qualification standards, ensuring reliability in automotive-grade applications like battery management systems (BMS), electric vehicle (EV) charging, and DC-DC converters. It also includes comprehensive fault detection mechanisms such as over-current, over-voltage, and temperature monitoring, which enhance system safety and diagnostics. The device operates at ultra-low quiescent current—typically less than 40 µA—which makes it ideal for energy-sensitive designs where minimizing power consumption is critical. It supports multiple operating modes, including continuous conversion, single-shot mode, and sleep mode, providing flexibility in power management strategies. With its flexible configuration registers and programmable alert thresholds, the INA229-Q1 allows users to tailor the device’s behavior to specific application needs without altering external circuitry. Its compact 3 mm × 3 mm WSON package and excellent thermal performance make it suitable for space-constrained applications such as onboard chargers, fuel cell systems, and smart sensors. The combination of high precision, low power, and automotive-grade reliability positions the INA229-Q1 as a key component in next-generation power monitoring solutions across demanding industries.