INA310A1QDGKRQ1

Overview

The INA310A1QDGKRQ1 is an AEC-Q100 qualified, ultra-precise current sense amplifier designed for automotive applications. It features a wide common-mode voltage range from –4 V to +110 V and operates on a single supply of 2.7 V to 20 V. The device provides a fixed gain of 20 V/V with a maximum gain error of 0.15% and offset voltage of ±30 µV. It includes an integrated open-drain comparator with a 0.6 V internal reference and latching capability. Key electrical parameters include a signal bandwidth of 1.3 MHz, quiescent current of 1.6 mA, and operation across a temperature range of –40°C to +125°C.

Feature Summary

• Ultra-precision architecture with low offset voltage and high common-mode rejection ratio for accurate current measurement
• Integrated open-drain comparator with internal 0.6 V reference and configurable latching mode via RESET pin
• Wide common-mode input range independent of supply voltage, supporting both high-side and low-side sensing
• High-speed response with 1.3 MHz bandwidth and short propagation delay suitable for fast overcurrent protection

Applications

• Electric power steering (EPS)
• eTurbo/charger systems
• Starter/generator circuits
• Regenerative braking systems
• Brake system monitoring

Procurement Notes

Verify the complete part number against official Texas Instruments documentation to ensure correct suffix alignment. Confirm that the specific ordering code matches the required gain version and package type. Check for any recent Product Change Notifications or functional safety documentation updates relevant to the manufacturing site. Ensure compatibility with automotive qualification standards before finalizing procurement.

Selection Notes

Select this component when high accuracy and wide common-mode voltage are required in automotive environments. The fixed 20 V/V gain suits applications needing moderate amplification with minimal external resistor networks. Consider the integrated comparator for simplified overcurrent protection designs without additional discrete components. Evaluate the trade-off between the 1.6 mA quiescent current and the high precision requirements of the specific system topology.

Part Context

This device belongs to the INA310x-Q1 family of ultra-precise current sense amplifiers. It shares architectural similarities with other members like the INA310B1QDGKRQ1 but offers tighter initial accuracy specifications. The Q1 suffix indicates automotive grade qualification under AEC-Q100 standards. It complements other TI automotive analog products by providing integrated sensing and protection capabilities in a compact VSSOP-8 package.

Replacement Considerations

INA310B1QDGKRQ1