INA293A2QDBVRQ1

Overview

The INA293A2QDBVRQ1 is an 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 voltage between 2.7 V and 20 V. The device provides a fixed gain of 50 V/V with a typical offset voltage of ±15 µV and a maximum gain error of ±0.15%. It achieves a bandwidth of 1.3 MHz and draws a quiescent current of 1.5 mA. The component is housed in a space-saving SOT-23 package.

Feature Summary

• Supports negative common-mode voltages down to -4 V, enabling precise measurement of recirculating currents in half-bridge configurations.
• Delivers high accuracy through low input offset voltage and excellent DC common-mode rejection ratio.
• Provides fast response capabilities suitable for rapid overcurrent detection and protection events.

Applications

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

Procurement Notes

Verify the specific suffix 'A2' confirms the 50 V/V gain configuration before procurement. Ensure the DBVR package variant matches the required PCB footprint. Confirm AEC-Q100 qualification status aligns with project reliability standards. Validate that the operating temperature range meets system environmental requirements.

Selection Notes

Select this part when high precision is required alongside a wide common-mode input range. The 50 V/V gain offers a balance between signal amplification and dynamic range. Consider the low offset voltage for applications involving small differential signals across shunt resistors. Evaluate the 1.3 MHz bandwidth against the necessary speed for fault detection in the target circuit.

Part Context

This component belongs to the INA293-Q1 family of ultra-precise current sense amplifiers. The family includes multiple gain options ranging from 20 V/V to 500 V/V. All variants share the same wide common-mode voltage capability and automotive-grade reliability specifications. The device utilizes a transconductance architecture with current feedback to maintain low bias currents.

Replacement Considerations

Other members of the INA293-Q1 family offer different fixed gains: INA293A1QDBVRQ1 (20 V/V), INA293A3QDBVRQ1 (100 V/V), INA293A4QDBVRQ1 (200 V/V), and INA293A5QDBVRQ1 (500 V/V). Substitution requires adjusting the shunt resistor value or system gain requirements to match the new gain factor.