ADA4051-1ARJZ-R2

Overview

The ADA4051-1ARJZ-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 of up to 17 µV maximum and offset drift of 0.1 µV/°C. Key electrical parameters include a typical supply current of 15 µA, a gain-bandwidth product of 125 kHz, and high power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR) of at least 110 dB.

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 unity-gain stability across the full operating temperature range.
• Delivers high precision through very low offset voltage and minimal offset drift over the extended industrial temperature range.

Applications

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

Procurement Notes

Verify the specific package type associated with the ARJZ suffix against the manufacturer's official ordering guide, as package variations exist within the ADA4051 series. Confirm that the R2 suffix corresponds to the correct tape and reel quantity for your manufacturing requirements. Ensure compatibility with the intended supply voltage range and load conditions specified in the datasheet before finalizing procurement.

Selection Notes

Select this component when designing circuits that require high precision signal conditioning with minimal power consumption. The zero-drift architecture makes it suitable for applications sensitive to temperature variations. Consider the trade-off between the low quiescent current and the slower slew rate compared to standard amplifiers. Verify that the required bandwidth does not exceed the 125 kHz gain-bandwidth product.

Part Context

The ADA4051-1 is part of Analog Devices' growing series of zero-drift operational amplifiers designed for battery-powered applications. It complements other devices like the ADA4051-2 (dual channel) and shares the same core technology. The series is characterized by its ability to maintain high accuracy without the need for external trimming or complex filtering for offset cancellation.

Replacement Considerations

Direct replacements within the same family include the ADA4051-1ARJZ (non-reel variant). For dual-channel applications, the ADA4051-2 series may be considered if pinout compatibility allows. Cross-family replacements should be evaluated based on matching offset voltage, supply current, and package dimensions.

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, rather than filtering it in the AC domain.

What is the input voltage range of the ADA4051-1?

The input voltage range extends from the negative supply rail (V–) to the positive supply rail (V+), enabling true rail-to-rail operation.

Is the ADA4051-1 stable in a unity-gain configuration?

Yes, the device is specifically designed to be unity-gain stable.