AD8675ARMZ

Overview

The AD8675ARMZ is a single-channel precision operational amplifier manufactured by Analog Devices Inc. It features a rail-to-rail output swing and operates within a supply voltage range of ±5 V to ±18 V. Key electrical specifications include a maximum input offset voltage of 75 µV, an input bias current of 2 nA maximum, and a gain-bandwidth product of 10 MHz. The device exhibits a voltage noise density of 2.8 nV/√Hz at 1 kHz and a typical slew rate of 2.5 V/µs. It is housed in an 8-lead Mini Small Outline Package (MSOP) and supports an extended industrial operating temperature range from -40°C to +125°C.

Feature Summary

• Features proprietary nulling capability via dedicated pins to compensate for external system offset errors without degrading CMRR or PSRR.
• Provides rail-to-rail output swing combined with ultralow offset voltage and drift across the full operating temperature range.
• Maintains very low input bias current and low input current noise while delivering wide bandwidth and high open-loop gain.

Applications

• Precision instrumentation
• PLL filters
• Strain gage amplifiers

Procurement Notes

Verify that the specific part number matches the required package type, as the AD8675 series includes both SOIC and MSOP variants. Confirm RoHS compliance status indicated by the 'Z' suffix. Ensure the ordering suffix corresponds to the desired tape and reel quantity if applicable. Cross-reference the manufacturer's latest datasheet revision to confirm updated thermal resistance and absolute maximum ratings before finalizing procurement.

Selection Notes

Select this component when applications require simultaneous optimization of DC precision and AC performance. The AD8675ARMZ is suitable for designs needing rail-to-rail output swings without sacrificing low noise characteristics. Consider the integrated offset nulling feature for systems requiring extreme accuracy where standard trimming methods are insufficient. Evaluate the MSOP package dimensions against available board space constraints.

Part Context

The AD8675ARMZ belongs to the AD8675 family of ultra-precision, rail-to-rail output operational amplifiers. It serves as the single-channel counterpart to the dual-channel AD8676. This series is designed to combine the wide bandwidth of general-purpose amplifiers with the precision attributes of chopper-stabilized devices, targeting high-performance analog signal processing tasks.

Replacement Considerations

The AD8676 is the dual-channel equivalent within the same family. For single-channel replacements, verify pin compatibility and electrical parameter alignment with the original design requirements.

FAQ

How does the AD8675 handle offset voltage compensation?

The device includes dedicated NULL pins (Pin 1 and Pin 8) that allow for the external adjustment of both device and system offset errors up to 3.5 mV referred to the input, without adversely affecting offset drift or common-mode rejection ratio.

What is the input voltage range specification?

The input voltage range extends from −3.0 V to +3.0 V when powered by ±5 V supplies, and expands to −12.5 V to +12.5 V when powered by ±15 V supplies.