AD8676ARMZ

Overview

The AD8676ARMZ is a dual precision operational amplifier featuring rail-to-rail output swing and ultralow noise characteristics. It operates within a supply voltage range of ±5 V to ±18 V, with full specification from ±5 V to ±15 V. Key electrical parameters include a typical offset voltage of 12 μV, maximum input bias current of 2 nA, and a gain bandwidth product of 10 MHz. The device exhibits a voltage noise density of 2.8 nV/√Hz at 1 kHz and maintains an open-loop gain of 120 dB. It is available in 8-lead MSOP and SOIC packages, supporting the extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Combines ultralow offset voltage and drift with very low input bias currents across the operating temperature range.
• Provides rail-to-rail output swing while maintaining wide bandwidth and minimal voltage noise for high signal integrity.
• Delivers high open-loop gain and common-mode rejection ratio suitable for precision signal conditioning applications.

Applications

• Precision instrumentation systems
• Phase-locked loop (PLL) filters
• Laser diode control loops
• Strain gage amplifiers
• Medical instrumentation

Procurement Notes

Verify the specific grade (B or A) required for your offset voltage specifications, as the base model number does not indicate grade. Confirm package type selection between MSOP and SOIC based on board space constraints. Ensure power sequencing guidelines are followed during design to prevent input overcurrent. Check RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when both low noise and rail-to-rail output are critical requirements. Compare against single-channel variants like the AD8675 if only one amplifier is needed. Consider the AD8676BRMZ variant if tighter offset voltage tolerances are necessary for B-grade performance. Evaluate thermal resistance values for PCB layout planning given the small package options.

Part Context

The AD8676ARMZ belongs to Analog Devices' ultraprecision op amp series, designed to bridge the gap between low-noise performance and precision DC accuracy. It shares architectural similarities with the OP184 regarding output swing but offers superior noise characteristics. The part is part of a broader family including single and quad configurations, allowing for consistent design methodologies across multi-channel applications.

Replacement Considerations

Direct functional substitutes include the AD8676ARZ (SOIC package) and AD8676BRMZ (B-grade MSOP). Verify pin compatibility and thermal characteristics when transitioning between package types. Single-channel equivalents such as the AD8675 may be used if channel count reduction is acceptable.