INA293B2QDBVRQ1

Overview

The INA293B2QDBVRQ1 is an automotive-grade ultra-precise current sense amplifier with a fixed gain of 50 V/V. It operates from a single supply voltage ranging from 2.7 V to 20 V, drawing a typical quiescent current of 1.5 mA. The device supports a wide common-mode input range from -4 V to +110 V and features a bandwidth of 1.3 MHz. Key electrical characteristics include a typical offset voltage of ±80 µV, a DC common-mode rejection ratio of 160 dB, and a maximum gain error of ±0.15%. It is housed in a space-saving SOT-23 package.

Feature Summary

• Supports negative common-mode voltages down to -4 V for precise measurement of recirculating currents in half-bridge applications
• Features a high bandwidth of 1.3 MHz and fast slew rate for rapid detection of overcurrent events
• Provides excellent accuracy with low offset voltage and high DC common-mode rejection ratio

Applications

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

Procurement Notes

Verify the specific suffix 'B2' confirms the 50 V/V gain configuration before procurement. Ensure the DBVR package variant matches the required PCB footprint. Confirm AEC-Q100 qualification status is necessary for the target automotive application environment.

Selection Notes

Select this component when a fixed 50 V/V gain is optimal for the system's dynamic range. Consider the 1.3 MHz bandwidth for high-speed protection requirements. Evaluate the -4 V to +110 V common-mode range against the shunt resistor placement and supply rail voltages.

Part Context

This part belongs to the INA293-Q1 family of ultra-precise current sense amplifiers designed for automotive environments. It utilizes a transconductance architecture with a current-feedback amplifier to achieve low bias currents while maintaining high precision across a wide operating temperature range.

Replacement Considerations

Other members of the INA293-Q1 family offer different fixed gains (20 V/V, 100 V/V, 200 V/V, 500 V/V). Verify that alternative gain options meet the specific signal-to-noise ratio and output swing requirements of the design.