BU7461G-TR

Overview

The BU7461G-TR is a single-channel, ground-sense operational amplifier manufactured by ROHM Semiconductor. It operates on a low voltage supply ranging from 1.7 V to 5.5 V with a typical quiescent current of 150 µA per channel. The device features a gain-bandwidth product of 1 MHz and a slew rate of 1 V/µs. It offers an input offset voltage of 1 mV and an input bias current of 1 pA. The output swing is rail-to-rail, extending to within 0.1 V of the negative supply. It is housed in a compact SSOP-5 package and supports an operating temperature range from -40°C to +105°C.

Feature Summary

• Ground-sense input capability allowing operation down to the negative supply rail
• Rail-to-rail output voltage swing for maximum dynamic range
• Ultra-low input bias current suitable for high-impedance sensor interfaces
• Integrated phase compensation capacitor for stable operation without external components

Applications

• Battery-powered portable instrumentation requiring low quiescent current
• Signal conditioning for low-voltage sensors in industrial automation
• Active filtering circuits in communication equipment
• Voltage reference buffering in microcontroller-based systems

Procurement Notes

Verify the specific suffix 'G' against the official ROHM datasheet to confirm the SSOP-5 package variant. Ensure the trailing '-TR' indicates the correct reel packaging configuration required for your assembly process. Cross-reference the manufacturer part number directly with the latest datasheet revision to avoid discrepancies in pinout or electrical characteristics.

Selection Notes

Select this component when a single-channel amplifier with ground-sense input is required under low voltage constraints. It is appropriate for designs needing rail-to-rail output performance with minimal power consumption. Consider the SSOP-5 footprint for space-constrained PCB layouts. Evaluate thermal management requirements given the wide operating temperature range up to 105°C.

Part Context

This device belongs to the BU7461 series of low-voltage CMOS operational amplifiers. The series is characterized by its ability to operate at voltages as low as 1.7 V while maintaining high precision. It is designed for applications where power efficiency and signal integrity are critical. The ground-sense feature distinguishes it from standard op-amps that cannot handle inputs near the negative rail.

Replacement Considerations

Official substitutes include other members of the BU7461 family such as the BU7462 for dual-channel needs, provided the package and electrical specifications match the design requirements. Verify compatibility with existing board layouts and thermal profiles before substitution.

FAQ

What is the input voltage range for the BU7461G-TR?

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

Does the BU7461G-TR require external phase compensation?

No, the device integrates phase compensation capacitors internally, eliminating the need for external components.

What is the typical output short-circuit current?

The typical output current is 8 mA per channel, providing sufficient drive capability for most low-power applications.