BU7421SG-TR

Instrumentation, Op Amps, Buffer Amps Overview

The BU7421SG-TR is a low-power ground-sense operational amplifier from ROHM Semiconductor, designed for single-supply operation within a voltage range of +1.6V to +5.5V. This CMOS device integrates input and output full-swing capabilities alongside ground-sense functionality on a single chip. It features an ultra-low supply current of 8.5μA, making it suitable for battery-driven applications. The component operates across a wide temperature range from -40°C to +85°C and is housed in a compact SSOP5 package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low power consumption with only 8.5μA supply current
• Ground-sense input and full-swing output capability
• Wide operating temperature range from -40°C to +85°C
• Low input bias current of 1pA typical

Instrumentation, Op Amps, Buffer Amps Applications

• Portable electronic devices requiring extended battery life
• Battery-powered sensor interfaces
• Low-voltage signal conditioning circuits
• Handheld measurement instruments

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'SG' against the official manufacturer datasheet to confirm pinout and electrical characteristics match the standard BU7421G variant. Ensure the ordering code includes the '-TR' taping designation if reel packaging is required for surface-mount assembly processes.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when designing circuits that require rail-to-rail output swing while maintaining input sensitivity down to the negative supply rail. The low quiescent current makes it ideal for energy-constrained systems where standard op-amps would drain batteries too quickly.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the BU7421 family of low-power CMOS operational amplifiers. It shares architectural similarities with the BU7265 and BU7411 series but offers distinct current consumption profiles tailored for different performance tiers within portable electronics.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Consult the official ROHM replacement guide for direct substitutes. The BD7541G-TR is a high-voltage alternative but differs significantly in supply voltage requirements and may not be compatible with low-voltage designs.