BU7442SFVM-TR

Overview

The BU7442SFVM-TR is a dual-channel, low-voltage operational amplifier manufactured by ROHM Semiconductor. It operates within a supply voltage range of 1.7 V to 5.5 V and features a typical supply current of 100 µA per channel. The device offers a gain-bandwidth product of 600 kHz and a slew rate of 300 mV/µs. It utilizes an 8-MSOP package with a junction temperature range extending up to 105°C. Key electrical characteristics include an input offset voltage of 1 mV and an input bias current of 1 pA.

Feature Summary

• Ground-sense input capability allowing operation down to the negative supply rail
• Full output swing capability reaching both positive and negative supply rails
• Ultra-low input bias current suitable for high-impedance sensor interfaces
• Integrated phase compensation capacitors for stable single-chip implementation

Applications

• Battery-powered portable instrumentation requiring extended runtime
• Low-voltage signal conditioning for industrial sensors
• Portable medical devices utilizing ground-referenced inputs
• Consumer electronics with strict power consumption constraints
• Data acquisition systems operating on single low-voltage supplies

Procurement Notes

Verify the specific suffix configuration against the official manufacturer datasheet to ensure correct packaging and temperature grade. Confirm that the 8-MSOP footprint matches the target PCB design. Check for any RoHS compliance documentation required for the specific manufacturing batch. Ensure the ordering quantity aligns with the standard taping reel specifications provided by the supplier.

Selection Notes

Select this component when ground-referenced input signals are present in low-voltage environments. The low bias current makes it ideal for interfacing with high-impedance sources without significant signal degradation. Compare the 100 µA supply current against other family members if lower power is critical, noting that some variants offer reduced current at the expense of speed. Ensure the 6 mA output drive capability meets the load requirements.

Part Context

This device belongs to the BU7442 series of CMOS operational amplifiers designed for low-voltage applications. The series integrates multiple channels on a single die with built-in phase compensation. It is part of ROHM's portfolio of ground-sense amplifiers, distinguishing itself from standard rail-to-rail op-amps by its ability to handle input voltages at or below the negative supply potential while maintaining full output swing.

Replacement Considerations

Consult the official manufacturer documentation for confirmed substitute part numbers. Verify pin compatibility and electrical parameter equivalence before substitution. Ensure that any replacement maintains the same ground-sense input characteristic and low-voltage operating range.

FAQ

What is the input voltage range relative to the supply rails?

The input voltage range extends from the negative supply (Vss) to approximately 1.2 V below the positive supply (Vdd), enabling ground-sense operation.

Does the BU7442SFVM-TR support full output swing?

Yes, the output voltage range spans from Vss + 0.1 V to Vdd - 0.1 V, providing near rail-to-rail output capability.

What is the maximum junction temperature for this component?

The maximum operating junction temperature is specified as 105°C according to the manufacturer's data sheet.