INA293B5QDBVRQ1

Overview

The INA293B5QDBVRQ1 is an automotive-grade, ultra-precise current sense amplifier featuring a fixed gain of 500 V/V. It operates with a common-mode voltage range from -4 V to +110 V and supports a supply voltage between 2.7 V and 20 V. The device provides a bandwidth of 900 kHz, a slew rate of 2.5 V/µs, and a quiescent current of 1.5 mA. Key electrical characteristics include a typical offset voltage of ±2 µV, a DC CMRR of 160 dB, and a maximum gain error of ±0.15%. It is housed in a space-saving SOT-23-5 package.

Feature Summary

• Ultra-precise zero-drift architecture enabling low offset voltage and minimal drift for accurate measurements across wide temperature ranges.
• Wide common-mode input range supporting both high-side and low-side sensing, including negative voltages below ground.
• High-speed response with significant bandwidth and fast slew rate designed for rapid overcurrent detection and protection.
• Fixed internal gain network providing high accuracy without requiring external precision resistors.

Applications

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

Procurement Notes

Verify the specific 'B5' suffix indicates the 500 V/V gain configuration when ordering. Confirm AEC-Q100 qualification requirements match your automotive grade specifications. Ensure the SOT-23-5 pinout variant (INA293B) aligns with your PCB layout design. Validate that the operating temperature range meets your system's environmental constraints.

Selection Notes

Select this component when a high fixed gain of 500 V/V is required to amplify small shunt voltages. Consider the 900 kHz bandwidth limit for high-frequency signal integrity. Evaluate the 1.5 mA quiescent current against power budget constraints. Ensure the differential input voltage remains within the specified limits for the chosen gain setting.

Part Context

This part belongs to the INA293-Q1 family of ultra-precise current sense amplifiers. It shares the same core topology and packaging as other variants but differs by its fixed internal gain of 500 V/V. The family offers gains ranging from 20 V/V to 500 V/V to accommodate various dynamic range requirements in automotive and industrial sensing applications.

Replacement Considerations

Direct substitutes within the same family include INA293A5QDBVRQ1, which shares the 500 V/V gain but may have different pinout configurations or tolerance grades. Verify functional compatibility regarding common-mode range and supply voltage before substitution.

FAQ

What is the maximum differential input voltage for the INA293B5QDBVRQ1?

The absolute maximum differential input voltage is limited to 6 V for the INA293x5-Q1 variants.

Does the INA293B5QDBVRQ1 support bidirectional current sensing?

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