INA290A5QDCKRQ1

Overview

The INA290A5QDCKRQ1 is an ultra-precise, high-side current sense amplifier qualified to AEC-Q100 standards for automotive applications. It operates with a supply voltage from 2.7 V to 20 V and supports a common-mode input range of 2.7 V to 120 V. The device features a fixed gain of 500 V/V, a typical DC common-mode rejection ratio of 160 dB, and a maximum offset voltage of ±12 µV. It provides a bandwidth of 800 kHz at this gain level and draws a quiescent current of 370 µA. The component is housed in a space-efficient SC-70 (DCK) five-pin package.

Feature Summary

• Ultra-precise measurement capability achieved through zero-drift topology and low offset voltage.
• High-speed response suitable for fast overcurrent protection and rapid detection applications.
• Wide common-mode voltage range enabling operation across various system voltage rails.
• Automotive qualification ensuring reliability under extended temperature conditions.

Applications

• Solid-state LiDAR systems
• Automotive HVAC compressor modules
• Automotive interior heater modules
• Automotive parking heater modules
• Automotive pumps

Procurement Notes

Verify the specific suffix 'A5' confirms the 500 V/V gain configuration required for the design. Ensure the 'Q1' designation aligns with automotive grade requirements. Confirm the 'DCK' package matches the PCB footprint constraints. Validate that the operating voltage range meets the system's common-mode and supply specifications.

Selection Notes

Select this variant when a high gain of 500 V/V is necessary to amplify small differential signals from low-value shunt resistors. Consider the 800 kHz bandwidth limitation compared to lower gain versions if higher frequency response is critical. Evaluate the power dissipation benefits of using a smaller sense resistor enabled by the high gain. Ensure the unidirectional operation mode fits the current flow direction of the application.

Part Context

This component belongs to the INA290-Q1 family of ultra-precise current sense amplifiers designed for high-side sensing. The family offers multiple gain options ranging from 20 V/V to 500 V/V to optimize dynamic range. All variants share the same SC-70 package and core architecture, differing primarily in internal resistor networks that set the closed-loop gain.

Replacement Considerations

Other gain variants within the INA290-Q1 family, such as INA290A4QDCKRQ1 or INA290A3QDCKRQ1, may serve as substitutes if the system can accommodate different gain factors. Verify pin compatibility and thermal characteristics remain unchanged during substitution.