INA293B1QDBVRQ1

Overview

The INA293B1QDBVRQ1 is an ultra-precise current sense amplifier qualified to AEC-Q100 Grade 1 standards for automotive applications. It operates with a common-mode voltage range from -4 V to +110 V and supports a supply voltage of 2.7 V to 20 V. The device features a fixed gain of 20 V/V, a bandwidth of 1.3 MHz, and a slew rate of 2.5 V/µs. Key electrical characteristics include a typical offset voltage of ±15 µV, a DC CMRR of 160 dB, and a quiescent current of 1.5 mA.

Feature Summary

• AEC-Q100 qualified for automotive environments with functional safety capability documentation
• Ultra-precise zero-drift topology enabling accurate measurement of low differential voltages across shunt resistors
• Wide common-mode input range supporting both high-side and low-side sensing configurations
• High-speed response suitable for rapid overcurrent detection and protection

Applications

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

Procurement Notes

Verify the specific suffix 'B1' confirms the 20 V/V gain configuration before procurement. Ensure the DBVR package variant matches the required PCB footprint. Confirm that the Q1 designation aligns with the project's automotive qualification requirements. Cross-reference the datasheet revision date to ensure compatibility with latest design guidelines.

Selection Notes

Select this component when a fixed gain of 20 V/V is required for wide dynamic range current sensing. The device is appropriate for applications needing high bandwidth and fast transient response. Consider the negative common-mode capability if operating below ground potential. Evaluate the power dissipation limits of the shunt resistor based on the selected gain setting.

Part Context

This part belongs to the INA293-Q1 family of ultra-precise current sense amplifiers. The B1 suffix specifically denotes the version with a fixed internal gain of 20 V/V. Other variants in the series offer gains of 50 V/V, 100 V/V, 200 V/V, and 500 V/V. All share the same SOT-23 package and core architectural features.

Replacement Considerations

INA293A1QDBVRQ1 offers identical specifications but with a different pinout arrangement within the SOT-23 package.