BU7271SG-TR

Overview

The BU7271SG-TR is a single-channel ultra-low supply current operational amplifier manufactured by ROHM Semiconductor. It operates within a power supply voltage range of 1.8 V to 5.5 V and consumes a typical operating current of 8.6 µA per channel. The device features a gain-bandwidth product of 90 kHz, a slew rate of 50 V/µs, and an input offset voltage of 1 mV. Input bias current is typically 1 pA, with an output current capability of 4 mA. It provides a common-mode rejection ratio of 45 dB and a power supply rejection ratio of 60 dB. The component is housed in an SSOP-5 package and supports surface mount installation across a temperature range of -40°C to +85°C.

Feature Summary

• Ultra-low supply current consumption suitable for battery-powered applications
• Full amplitude input and output voltage swing capabilities
• Integrated phase compensation capacitor for stability

Applications

• Portable electronic devices
• Battery-operated equipment
• Low-power sensor signal conditioning

Procurement Notes

Verify the exact part number against official ROHM documentation, as the provided knowledge base lists BU7271G-TR rather than BU7271SG-TR. Confirm that the suffix 'SG' does not indicate a distinct variant with different electrical characteristics or packaging specifications compared to the standard G suffix. Ensure compatibility with the intended SSOP-5 footprint and verify RoHS compliance status through the manufacturer's current datasheet before procurement.

Selection Notes

Select this component when designing circuits requiring minimal quiescent current while maintaining full rail-to-rail input and output voltage swings. The high slew rate relative to its bandwidth makes it suitable for applications needing fast response times without excessive power draw. Consider the 1 pA input bias current for high-impedance source applications. Verify that the 45 dB CMRR meets the system's noise rejection requirements.

Part Context

The BU7271 series belongs to ROHM's family of low-voltage CMOS operational amplifiers designed for portable and battery-driven systems. These amplifiers integrate internal phase compensation capacitors, simplifying circuit design by eliminating external components. The series emphasizes low power consumption alongside wide operating voltage ranges, making them ideal for modern energy-efficient electronics where space and power are constrained.

Replacement Considerations

Publicly confirmed substitute part numbers for BU7271SG-TR were not found in the provided data. Cross-reference with BU7271G-TR only if verified by ROHM as electrically identical.