AD8672ARZ

Overview

The AD8672ARZ is a dual-channel precision operational amplifier manufactured by Analog Devices Inc. It features a 10 MHz gain bandwidth product, 4 V/µs slew rate, and 2.8 nV/√Hz voltage noise density at 1 kHz. The device operates on dual supplies ranging from ±5 V to ±15 V with a maximum supply voltage of 36 V. Key electrical specifications include a maximum input offset voltage of 75 µV, a minimum open-loop gain of 120 dB, and a maximum input bias current of 12 nA. It is unity-gain stable, exhibits no phase reversal, and can drive capacitive loads exceeding 1000 pF. The component operates within an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Extremely low input voltage noise density for high-fidelity signal processing
• High open-loop gain ensuring precise DC accuracy and minimal error
• Stable operation with large capacitive loads without external compensation
• Immunity to output phase reversal during overdrive conditions

Applications

• PLL filters
• Filters for GPS systems
• Precision instrumentation
• Sensors and controls
• Professional quality audio

Procurement Notes

Verify the specific ordering suffix to confirm package type and reel configuration. Ensure the RoHS compliant designation matches project requirements. Confirm that the extended industrial temperature rating aligns with environmental operating conditions. Cross-reference the datasheet revision to validate all electrical parameters against the latest manufacturing standards before finalizing procurement.

Selection Notes

Select this component when system design requires simultaneous low noise and high precision in a dual-channel architecture. The wide bandwidth supports AC signal conditioning tasks while maintaining excellent DC characteristics. Consider the power dissipation limits and thermal resistance values if operating near maximum supply voltages or ambient temperatures. Evaluate the need for capacitive load driving capabilities to determine if additional isolation resistors are necessary.

Part Context

This part belongs to the AD867x family of very low noise, low input bias current operational amplifiers. The series includes single-channel (AD8671) and quad-channel (AD8674) variants sharing similar electrical performance profiles. The AD8672 specifically provides two independent amplifiers in an 8-lead SOIC package, offering board space efficiency compared to discrete solutions.

Replacement Considerations

Consult the manufacturer's ordering guide for direct pin-compatible alternatives within the same series. Verify that any substitute maintains the required 10 MHz bandwidth and low noise specifications.