INA293A1QDBVRQ1

Overview

The INA293A1QDBVRQ1 is an ultra-precise current sense amplifier designed for automotive applications, featuring AEC-Q100 qualification. It supports 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 typical offset voltage of ±15 µV and a maximum gain error of ±0.15%. It delivers a bandwidth of 1.3 MHz and draws a quiescent current of 1.5 mA.

Feature Summary

• Supports negative common-mode voltages down to -4 V for precise measurement of recirculating currents in half-bridge configurations.
• Features a zero-drift input architecture that ensures low offset voltage and minimal drift across the full operating temperature range.
• Provides high signal throughput with a 1.3 MHz bandwidth and fast slew rate suitable for rapid overcurrent protection detection.

Applications

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

Procurement Notes

Verify the specific 'A' suffix indicates the 20 V/V gain option when ordering. Confirm the DBVR package variant matches the required pinout configuration for the target PCB layout. Ensure the component meets the functional safety documentation requirements if utilized in safety-critical designs.

Selection Notes

Select this part for applications requiring unidirectional current sensing with high accuracy. The 20 V/V gain is optimal for larger differential signals or lower noise sensitivity requirements compared to higher gain variants. Consider the output swing limitations relative to the supply voltage when designing the load interface.

Part Context

This component belongs to the INA293-Q1 family of ultra-precise current sense amplifiers. It shares the same core transconductance architecture and wide common-mode range as other gain variants within the series, differing primarily in its internal fixed gain setting of 20 V/V.

Replacement Considerations

Direct substitutes include other members of the INA293-Q1 family such as the INA293B1QDBVRQ1, which offers identical specifications but may differ in initial offset voltage precision grades.

FAQ

Can the INA293A1QDBVRQ1 measure bidirectional current?

No, the device operates in unidirectional mode only, sensing current sourced from a power supply to a system load.

What is the minimum differential input voltage required for linear operation?

To keep the output in the linear region, a differential input voltage of at least 20 mV divided by the gain (1 mV for this device) should be applied.