AD8675ARMZ-R2

Overview

The AD8675ARMZ-R2 is a single-channel precision operational amplifier manufactured by Analog Devices Inc. It features ultralow offset voltage (max 75 µV), low drift (0.6 µV/°C), and very low input bias current (2 nA). The device offers a gain bandwidth product of 10 MHz, a slew rate of 2.5 V/µs, and rail-to-rail output swing. It operates from ±5 V to ±18 V supplies with a supply current of approximately 2.9 mA at ±15 V. The component includes proprietary nulling pins for external offset compensation.

Feature Summary

• Proprietary external offset nulling capability allows compensation of up to 3.5 mV referred to the input without affecting drift or rejection ratios.
• Rail-to-rail output swing maximizes dynamic range and signal-to-noise ratio in precision applications.
• Very low input bias current combined with wide bandwidth supports high-impedance sensor interfaces.

Applications

• Precision instrumentation
• PLL filters
• Laser diode control loops
• Strain gage amplifiers
• Medical instrumentation

Procurement Notes

Verify the specific package variant against the datasheet ordering guide. The suffix RM-8 indicates an 8-Lead Mini Small Outline Package. Confirm RoHS compliance status as indicated by the Z suffix. Ensure the source documentation matches the Rev E specification sheet for accurate electrical parameters.

Selection Notes

Select this component when ultralow noise and dc precision are required alongside rail-to-rail output capabilities. The AD8675ARMZ-R2 is suitable for space-critical designs due to its compact MSOP packaging. Consider the dual-channel AD8676 if two identical amplifiers are needed on a single substrate.

Part Context

The AD8675 belongs to Analog Devices' series of low noise op amps. It combines the rail-to-rail output of the OP184 with the precision and low power consumption of the OP07. The device is specified for the extended industrial temperature range of -40°C to +125°C.

Replacement Considerations

The dual-channel equivalent is the AD8676. Single-channel alternatives include the AD8671 and AD8597, though these differ in noise performance and package options.

FAQ

How does the AD8675 handle external offset adjustment?

The device features proprietary nulling pins (Pin 1 and Pin 8) that allow external adjustment of both device and system offset errors up to 3.5 mV referred to the input.

What is the maximum supply voltage for the AD8675?

The absolute maximum supply voltage rating is ±18 V. Operation is fully specified from ±5 V to ±15 V.