BU7421G-TR

Overview

The BU7421G-TR is a single ultra-low power CMOS operational amplifier manufactured by Rohm Semiconductor. It features a supply voltage range of +1.6V to +5.5V and operates within a temperature range of -40°C to +85°C. Key electrical parameters include a typical circuit current of 8.5μA, an input offset voltage maximum of 6mV, and a gain-bandwidth product of 0.09MHz. The device offers a typical voltage gain of 100dB, output current of 4mA, and slew rate of 0.05V/µs. It utilizes a 5-SSOP package with dimensions of 2.9x2.8mm.

Feature Summary

• Ultra-low power consumption with typical current of 8.5μA
• Ground sense capability allowing input voltage range from VSS to VDD-1.2V
• High DC voltage gain for precision applications
• Integrated electrostatic protection circuit

Applications

• Portable electronic devices
• Battery-powered equipment
• Low voltage signal processing circuits

Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation. Ensure the SSOP5 package dimensions match your PCB footprint requirements. Check for any automotive qualification restrictions as this is a standard-grade product not recommended for vehicle use.

Selection Notes

Select this component when ultra-low quiescent current is critical alongside ground-sense input requirements. The low supply voltage operation makes it suitable for single-cell battery systems. Consider the limited bandwidth and slew rate for high-speed applications where they may be insufficient. Verify that the 6mV max input offset voltage meets your precision needs.

Part Context

This part belongs to the BU7421 family of low-power ground-sense operational amplifiers. It shares architectural similarities with the BU7265 and BU7411 families but differs in current consumption levels. The BU7421 series is designed specifically for portable and battery-driven applications requiring minimal power draw while maintaining functional ground reference capabilities.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.