ADA4051-1ARJZ-R7

Overview

The ADA4051-1ARJZ-R7 is a single-channel, micropower, zero-drift operational amplifier manufactured by Analog Devices Inc. It operates from 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 2 µV typical and offset drift of 20 nV/°C. Key electrical parameters include a gain-bandwidth product of 125 kHz, a slew rate of 60 mV/µs, and a typical supply current of 15 µA per amplifier. It offers high power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR), both exceeding 110 dB minimum.

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 operation.
• Provides extremely low offset voltage and drift characteristics suitable for precision signal conditioning.
• Operates with micropower consumption, drawing only 15 µA typical supply current.

Applications

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

Procurement Notes

Verify the specific package type and reel quantity against the official Analog Devices ordering guide before procurement. Confirm that the R7 suffix corresponds to the correct tape and reel packaging format required for your assembly process. Ensure compatibility with the extended industrial temperature range specifications if operating in extreme environments.

Selection Notes

Select this component when high precision and low power consumption are critical requirements. It is ideal for battery-powered applications where maintaining accuracy over temperature variations is necessary. Consider the 125 kHz bandwidth and 60 mV/µs slew rate for slow-moving signal applications. Verify that the SOT-23-5 package fits within the available PCB space constraints.

Part Context

This device belongs to the ADA4051 series of zero-drift operational amplifiers offered by Analog Devices. The series includes dual amplifier variants such as the ADA4051-2. These amplifiers are designed for applications requiring high precision at very low power levels, leveraging patented chopping technology to eliminate 1/f noise and minimize offset drift across the operating temperature range.

Replacement Considerations

Direct functional replacements within the same family include the ADA4051-2 for dual-channel requirements. Other Analog Devices zero-drift amplifiers may serve as alternatives depending on specific performance needs, but pinout and package compatibility must be verified.

FAQ

Does the ADA4051-1 exhibit output phase reversal?

No, the device does not exhibit output phase reversal, even when the input signal exceeds the common-mode voltage range.

What is the mechanism used to reduce offset voltage?

The amplifier uses an innovative chopping technique combined with autocorrection feedback to null initial offset in the DC domain, preventing output ripple.