INA293A5QDBVRQ1

Overview

The INA293A5QDBVRQ1 is an ultra-precise current sense amplifier from the INA293-Q1 family, designed for automotive applications. It features a fixed gain of 500 V/V and operates with a common-mode voltage range from -4 V to +110 V. The device supports a supply voltage between 2.7 V and 20 V, drawing a typical quiescent current of 1.5 mA. It offers a bandwidth of 900 kHz at this gain setting and includes a slew rate of 2.5 V/µs. Key electrical characteristics include a maximum DC CMRR of 160 dB, a typical offset voltage of ±2 µV, and a gain error of ±0.15%. It is housed in a space-saving SOT-23-5 package.

Feature Summary

• Provides high-precision current measurement through a zero-drift input architecture that ensures low offset voltage and minimal drift across wide temperature ranges.
• Supports both high-side and low-side sensing configurations due to a wide common-mode input range extending below ground potential.
• Delivers fast response times suitable for rapid overcurrent detection and protection events via high signal throughput capabilities.

Applications

• 48-V automotive systems
• Solenoid control circuits
• 48-V DC/DC converters
• Valve control mechanisms

Procurement Notes

Verify the specific suffix 'A5' confirms the 500 V/V gain configuration required for your design. Ensure the QDBVR package variant matches your PCB footprint requirements. Confirm AEC-Q100 qualification aligns with your automotive reliability standards. Check the latest datasheet revision for any updates to absolute maximum ratings or thermal metrics before finalizing procurement.

Selection Notes

Select this component when a high gain of 500 V/V is necessary to amplify small differential signals from low-ohmic shunt resistors. It is suitable for applications requiring precise measurement of recirculating currents in half-bridge topologies. Consider the 900 kHz bandwidth limit at this gain setting against your system's frequency requirements. Evaluate the trade-off between power dissipation in the shunt resistor and the amplified output signal level.

Part Context

This part belongs to the INA293-Q1 series of ultra-precise current sense amplifiers. It shares the same functional block diagram and general specifications as other gain variants like the INA293A4QDBVRQ1, differing primarily in its internal fixed gain resistor network. The series is characterized by its ability to operate with negative common-mode voltages and its robust performance in harsh automotive environments.

Replacement Considerations

Direct substitutes within the same family include the INA293B5QDBVRQ1, which shares identical electrical specifications but may differ in pinout orientation. Other gain variants such as the INA293A4QDBVRQ1 (200 V/V) can be used if circuit adjustments are permissible. Verify pin compatibility and thermal resistance values when replacing with non-identical gain parts.