BU7442SF-E2

Overview

The BU7442SF-E2 is a dual-channel ground sense low voltage operational amplifier manufactured by ROHM Semiconductor. It operates within a supply voltage range of 1.7 V to 5.5 V and consumes a typical quiescent current of 50 µA per channel. Key electrical specifications include a gain-bandwidth product of 600 kHz, a slew rate of 300 mV/µs, and an input offset voltage of 1 mV. The device features extremely low input bias current of 1 pA and supports output swing from near ground to the positive rail. It is housed in an SOP-8 package and functions reliably across an operating temperature range of -40°C to +105°C.

Feature Summary

• Ground sense input capability allowing operation with signals at or near the negative supply rail
• Full output voltage swing extending to the negative supply (ground) for maximum dynamic range
• Ultra-low power consumption suitable for battery-operated and portable applications
• CMOS technology ensuring minimal input bias current and high input impedance

Applications

• Battery-powered sensor signal conditioning circuits
• Portable medical instrumentation requiring low voltage operation
• Industrial data acquisition systems with single-supply configurations
• Audio pre-amplifiers in low-power consumer electronics
• Active filter designs in space-constrained mobile devices

Procurement Notes

Verify the specific suffix E2 against the official ROHM datasheet to confirm pinout compatibility and environmental compliance status. Ensure the SOP-8 package dimensions match your PCB footprint requirements. Confirm that the operating temperature range meets your system's thermal constraints before finalizing component selection.

Selection Notes

Select this component when designing single-supply circuits that require input signals to reach ground potential without distortion. Compare the 600 kHz bandwidth against your signal frequency requirements to ensure adequate phase margin. Consider the 50 µA current draw relative to your total system power budget, especially if multiple amplifiers are used in parallel.

Part Context

This device belongs to the BU7442 series of low voltage CMOS operational amplifiers designed for general-purpose analog signal processing. The series emphasizes low power efficiency while maintaining sufficient performance for precision applications. It serves as a cost-effective solution for replacing higher voltage op-amps in modern low-voltage digital systems.

Replacement Considerations

Official substitutes within the same family include variants with different packaging options such as MSOP-8 or VSON-8, provided the electrical characteristics remain identical. Verify that any replacement maintains the same ground-sense input capability and full output swing specifications to ensure circuit compatibility.