INA190A1IRSWR

Overview

The INA190A1IRSWR is a single-channel, zero-drift current sense amplifier manufactured by Texas Instruments. It operates with a supply voltage range of 1.7 V to 5.5 V and supports bidirectional current sensing with a common-mode voltage range extending from -200 mV to 40 V. Key electrical specifications include a maximum input offset voltage of 2 µV, an input bias current of 500 pA, and a quiescent current of 40 µA per channel. The device features a gain bandwidth product of 45 kHz and a slew rate of 0.25 V/µs. It provides rail-to-rail output capability and is housed in a 10-UQFN (1.8x1.4 mm) package, suitable for operation across a temperature range of -40°C to 125°C.

Feature Summary

• Zero-drift architecture ensures high precision with minimal offset voltage drift over temperature variations.
• Bidirectional sensing capability allows accurate measurement of current flow in both directions within the specified common-mode voltage range.
• Low power consumption design enables efficient operation in battery-powered applications with a typical quiescent current of 40 µA.

Applications

• Battery management systems requiring precise current monitoring
• Industrial process control loops with low-side or high-side sensing needs
• Overcurrent protection circuits in portable electronic devices

Procurement Notes

Verify the specific suffix 'A1' indicates the correct gain and accuracy grade required for your application, as this variant differs from other INA190 models. Confirm the 'RSWR' suffix corresponds to the 10-UQFN package and tape-and-reel shipping format. Ensure compatibility with your PCB footprint dimensions of 1.8x1.4 mm. Check for any recent Product Change Notifications regarding assembly sites or materials that may affect long-term availability or compliance status.

Selection Notes

Select this component when ultra-low offset voltage and zero-drift performance are critical for maintaining accuracy over wide temperature ranges. The 40 µA quiescent current makes it suitable for energy-constrained designs compared to higher-power alternatives. Consider the 45 kHz bandwidth for applications requiring moderate speed without excessive noise. Verify that the 40 V common-mode range aligns with your system's bus voltage requirements.

Part Context

This part belongs to the INA190 family of ultra-precise, bidirectional current-sense amplifiers from Texas Instruments. The family is characterized by its zero-drift technology, which eliminates the need for external calibration in many applications. The INA190 series offers various gain options and package configurations to suit different space and performance constraints in modern electronic systems.

Replacement Considerations

Direct substitutes within the same family include INA190A1IDCKR and INA190A1NDDFREP, though package differences must be accounted for. Cross-family replacements like the INA180 series offer similar functionality but may differ in drift characteristics and bandwidth. Always verify pinout compatibility and thermal performance before substituting.