ADA4051-1AKSZ-RL

Overview

The ADA4051-1AKSZ-RL 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 (maximum 17 µV at 25°C) and minimal drift (0.1 µV/°C). Key electrical parameters include a typical supply current of 15 µA per amplifier, a gain bandwidth product of 125 kHz, and a slew rate of 60 mV/µs at 5 V operation. It is specified for the extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Utilizes an innovative chopping technique to suppress offset-related ripple in the DC domain without increasing in-band noise.
• Features rail-to-rail input and output swing capability for maximum dynamic range within the supply voltage limits.
• Provides high power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR) for robust performance in noisy environments.
• Designed for unity-gain stability with extremely low offset voltage and drift characteristics suitable for precision applications.

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 that the component meets the required environmental specifications for the intended operating temperature range. Ensure that the supply sequencing requirements are met during integration to prevent input current exceedance. Cross-reference the ordering guide to confirm availability and lead times through authorized distributors.

Selection Notes

Select this component when designing circuits that require high precision with minimal power consumption. The low supply current makes it suitable for battery-operated devices where energy efficiency is critical. The rail-to-rail I/O capability allows for optimal signal utilization in low-voltage systems. Consider the thermal resistance characteristics if operating in enclosed spaces or high ambient temperatures.

Part Context

The ADA4051-1 is part of the ADA4051 series of zero-drift operational amplifiers offered by Analog Devices. This series includes both single-channel (ADA4051-1) and dual-channel (ADA4051-2) variants. The components share similar electrical characteristics but differ in channel count and packaging options. The series is designed to provide high precision and low power consumption for various signal conditioning applications.

Replacement Considerations

Check the official ordering guide for direct substitutes within the ADA4051 family. Verify pin compatibility and electrical specifications when considering alternative packages or channel counts. Ensure that any replacement maintains the required zero-drift performance and supply voltage range.

FAQ

What is the mechanism used to achieve low offset voltage in the ADA4051-1?

The ADA4051-1 uses an innovative chopping technique combined with autocorrection feedback (ACFB) to null the initial offset in the DC domain, preventing output ripple while maintaining low in-band noise.

Does the ADA4051-1 experience phase reversal when the input exceeds the common-mode range?

No, the datasheet indicates that the ADA4051-1 does not exhibit phase reversal even when the input voltage exceeds the common-mode range.

What is the recommended method to further suppress output ripple?

It is recommended to add a postfilter at the output of the amplifier to further suppress the remaining voltage ripple originating from residual offset and intermodulation effects.