BU7442NUX-TR

Overview

The BU7442NUX-TR is a dual-channel, low-power ground-sense operational amplifier manufactured by ROHM Semiconductor. It operates on a single supply voltage ranging from 1.7 V to 5.5 V with a typical quiescent current of 50 µA per channel. The device features CMOS technology, offering an input voltage range extending to the negative rail (VSS) and an output swing capable of reaching within 0.1 V of VSS. Key electrical parameters include a gain-bandwidth product of 600 kHz, a slew rate of 300 mV/µs, and a maximum input offset voltage of 1 mV. It is housed in an 8-pin VSON package measuring 2.0 x 3.0 mm.

Feature Summary

• Ground-sense input capability allowing signal detection at the negative supply rail
• Full-amplitude output swing extending close to the negative supply voltage
• Ultra-low power consumption suitable for battery-operated applications
• Integrated phase compensation capacitors simplifying circuit design

Applications

• Portable consumer electronics requiring extended battery life
• Sensor signal conditioning circuits near ground potential
• Low-voltage analog signal processing in mobile devices
• Battery-powered instrumentation and measurement equipment

Procurement Notes

Verify the specific suffix -TR indicates tape-and-reel packaging when ordering. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected package variant matches the PCB footprint requirements exactly. Check for any automotive qualification restrictions if used in vehicle systems.

Selection Notes

Select this component for designs requiring ground-referenced input signals without level shifting. Compare the 600 kHz bandwidth against application frequency needs. Consider the VSON package size for space-constrained layouts. Verify that the 1.7 V minimum supply voltage aligns with the system's lowest operating condition.

Part Context

This part belongs to the BU7442 series of low-power operational amplifiers from ROHM. It is designed as a monolithic IC integrating two amplifier channels with internal phase compensation. The series emphasizes low voltage operation and minimal current draw, targeting portable and battery-driven electronic systems where power efficiency is critical.

Replacement Considerations

Consult official ROHM documentation for qualified alternative parts within the same family. Ensure any substitute maintains identical ground-sense input characteristics and low-voltage compatibility. Verify pinout and package dimensions match to avoid PCB redesign.