BU7444F-E2

Overview

The BU7444F-E2 is a low-power ground-sense operational amplifier manufactured by ROHM Semiconductor. It features four channels in an SOP-14 package, operating from a supply voltage range of 1.7 V to 5.5 V. Key electrical specifications include a typical gain-bandwidth product of 600 kHz, a slew rate of 300 mV/µs, and a maximum input offset voltage of 1 mV. The device draws 200 µA of quiescent current per channel and supports output currents up to 6 mA. It operates within a temperature range of -40°C to +105°C.

Feature Summary

• Ground-sense input capability allowing operation down to the negative supply rail
• Full output swing capability extending close to both supply rails
• Low power consumption suitable for battery-operated applications
• CMOS technology ensuring very low input bias current

Applications

• Portable consumer electronics requiring low power consumption
• Sensor signal conditioning circuits with ground-referenced inputs
• Battery-powered measurement instruments
• Industrial control systems with single-supply operation
• Audio pre-amplification stages in mobile devices

Procurement Notes

Verify the specific revision level and packaging configuration when ordering. Confirm that the SOP-14 footprint matches the target PCB design. Ensure thermal management considerations are addressed for operation at the upper limit of the specified temperature range. Check for any end-of-life notices or obsolescence warnings directly from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when ground-sense input is required alongside low power consumption. Compare against the BU7444SF-E2 if extended temperature performance beyond 85°C is needed. Consider the BU7244F-E2 if higher bandwidth is necessary for faster signal processing. Evaluate pin compatibility with existing designs using similar SOP-14 amplifiers.

Part Context

This part belongs to ROHM's BU7444 series of low-power operational amplifiers. The series is designed for general-purpose analog signal processing in portable devices. The E2 suffix typically indicates environmental compliance and specific manufacturing standards. This family emphasizes efficiency and rail-to-rail performance for modern low-voltage systems.

Replacement Considerations

Official substitutes include the BU7444SF-E2 for enhanced temperature stability. The BU7244F-E2 offers higher bandwidth but may consume more power. Verify pinout compatibility and electrical parameter overlaps before substitution. Consult ROHM documentation for direct replacement recommendations.

FAQ

What is the input voltage range for the BU7444F-E2?

The input voltage range extends from the negative supply rail (VSS) to approximately 1.2 V below the positive supply rail (VDD).

Does the BU7444F-E2 have a shutdown function?

No, the BU7444F-E2 does not include a shutdown feature; it operates continuously once powered.

What is the typical quiescent current per channel?

The typical circuit current is 0.05 mA per channel, resulting in a total supply current of approximately 200 µA for all four channels.