OP285GS

Instrumentation, Op Amps, Buffer Amps Overview

The OP285GS is a dual precision operational amplifier featuring the Butler Amplifier front-end, combining bipolar accuracy with JFET speed. It operates on supply voltages from ±4.5 V to ±22 V. Key electrical parameters include a gain-bandwidth product of 9 MHz, a slew rate of 22 V/µs, and an input offset voltage of 250 µV. The device draws 5 mA of supply current and provides 30 mA output drive per channel. It is specified over an extended industrial temperature range of -40°C to +85°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Butler Amplifier front-end design merging bipolar transistor precision with JFET high-speed performance
• Laser-trimmed low input offset voltage ensuring DC-coupled accuracy without external adjustment
• Inherent short-circuit protection to ground with internal current limiting
• Unity-gain stable operation suitable for demanding signal conditioning applications

Instrumentation, Op Amps, Buffer Amps Applications

• High-performance audio systems
• Active filters and integrators
• Fast instrumentation amplifiers
• Driving analog-to-digital converters

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'GS' corresponds to the 8-lead SOIC_N package and the -40°C to +85°C operating range. Confirm that the ordering code matches the Rev. C datasheet specifications. Ensure compatibility with surface-mount assembly processes for the narrow body package.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high slew rates and wide bandwidth are required alongside low noise and precision. It is suitable for applications needing fast settling times and high output current drive. Consider the phase reversal characteristics if inputs exceed the negative common-mode limit in noninverting configurations.

Instrumentation, Op Amps, Buffer Amps Part Context

The OP285 belongs to Analog Devices' precision high-speed amplifier family. It utilizes a unique Butler Amplifier architecture to achieve performance metrics typically found in separate bipolar and JFET devices. This monolithic construction ensures matched characteristics between the two channels within the package.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

OP285GSZ

Instrumentation, Op Amps, Buffer Amps FAQ

What causes output voltage phase reversal in the OP285?

Phase reversal may occur if either input exceeds the negative common-mode input voltage, potentially due to severe industrial faults or sensor errors applying large negative voltages.

How does the OP285 handle input overcurrent conditions?

Internal Zener diodes clamp the differential input voltage to ±7.5 V. External resistors can be added to limit transient currents through these diodes to safe levels.