ADA4051-1ARJZ-RL

Overview

The ADA4051-1ARJZ-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) and minimal drift (0.1 µV/°C). Key electrical parameters include a gain-bandwidth product of 125 kHz, a typical supply current of 15 µA per amplifier, and high power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR) exceeding 110 dB. It is specified for the extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Utilizes an innovative chopping technique with autocorrection feedback to suppress offset-related ripple in the DC domain without increasing in-band noise.
• Features rail-to-rail input and output swing capability, allowing operation across the full supply voltage range.
• Provides high precision through very low offset voltage and exceptionally low offset voltage drift over temperature.
• Designed for micropower applications with a typical supply current of 13 µA to 15 µA per amplifier.

Applications

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

Procurement Notes

Verify the specific ordering suffix RL against the manufacturer's official documentation to confirm reel packaging specifications. Ensure compatibility with the required SOT-23-5 package footprint and thermal characteristics during design-in. Cross-reference the exact part number with the latest datasheet revision to confirm all electrical parameters match the intended application requirements.

Selection Notes

Select this component when designing circuits that require high precision signal conditioning under strict power constraints. 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 load capacitance requirements are met to ensure stability in unity-gain configurations.

Part Context

This device belongs to the ADA4051 series of micropower, zero-drift operational amplifiers offered by Analog Devices. The series includes dual-channel variants such as the ADA4051-2. These amplifiers are designed to replace traditional chopper-stabilized op amps while offering improved noise performance and eliminating the need for external post-filtering components in many applications.

Replacement Considerations

ADA4051-1ARJZ-R7

FAQ

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

It employs a local feedback loop called autocorrection feedback (ACFB) that nulls the initial offset in the DC domain, preventing ripple at the overall output without disturbing the desired input signal.

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 input operation.