ADA4051-1AKSZ-R2

Overview

The ADA4051-1AKSZ-R2 is a single-channel, micropower, zero-drift operational amplifier manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 1.8 V to 5.5 V and features rail-to-rail input and output capabilities. The device utilizes an innovative chopping technique to achieve extremely low offset voltage and drift. Key electrical specifications include a maximum offset voltage of 17 µV at 25°C, a typical supply current of 15 µA per amplifier, and a gain bandwidth product of 125 kHz. It is designed for extended industrial temperature operation from -40°C to +125°C.

Feature Summary

• Utilizes a novel chopping technique with autocorrection feedback to suppress offset-related ripple in the DC domain without increasing in-band noise.
• Provides rail-to-rail input and output swing capability while maintaining high precision under low power consumption conditions.
• Features high power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR) for robust performance in noisy environments.

Applications

• Pressure and position sensors
• Temperature measurements
• Electronic scales
• Medical instrumentation
• Battery-powered equipment

Procurement Notes

Verify the specific package type associated with the AKSZ suffix against official documentation before procurement. Confirm availability status through authorized distributors as supply constraints may apply. Ensure that the ordering suffix corresponds exactly to the required reel or cut tape configuration for your manufacturing process.

Selection Notes

Select this component when designing circuits that require ultra-low offset voltage and minimal drift over wide temperature ranges. It is suitable for applications where low power consumption is critical, such as battery-operated devices. Consider the 125 kHz gain bandwidth product and slow slew rate when evaluating signal speed requirements.

Part Context

This part belongs to the ADA4051 series of zero-drift operational amplifiers offered by Analog Devices. The series includes single-channel (ADA4051-1) and dual-channel (ADA4051-2) variants. These amplifiers are designed to replace traditional chopper-stabilized op amps by eliminating output ripple while maintaining low power and high precision characteristics.

Replacement Considerations

Direct replacements within the same family include the ADA4051-1ARMZ-R7 (MSOP package) and ADA4051-1ARJZ-R7 (SOT-23 package). Verify pin compatibility and thermal resistance differences when substituting packages.

FAQ

How does the ADA4051-1 handle offset-related ripple?

It uses an autocorrection feedback loop that nulls the initial offset in the DC domain, preventing ripple at the overall output instead of filtering it in the AC domain.

What is the maximum input offset voltage specified for this device?

The maximum input offset voltage is 17 µV at 25°C and 27 µV across the extended industrial temperature range of -40°C to +125°C.