ADA4051-2ARMZ-R7

Overview

The ADA4051-2ARMZ-R7 is a dual-channel, micropower, zero-drift operational amplifier manufactured by Analog Devices Inc. It utilizes an innovative chopping technique to achieve extremely low offset voltage and drift while maintaining rail-to-rail input and output swing. The device operates from a single supply ranging from 1.8 V to 5.5 V with a typical supply current of 13 μA per channel. Key electrical specifications include a maximum offset voltage of 15 μV, an offset voltage drift of 0.1 μV/°C, and a gain bandwidth product of 125 kHz. It features high power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR), ensuring precision in battery-powered applications.

Feature Summary

• Zero-drift architecture utilizing innovative chopping technique for low offset and drift
• Rail-to-rail input and output capability across the full supply range
• Micropower consumption with typical supply current of 13 μA per channel
• Extended industrial temperature operation from -40°C to +125°C

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. Confirm that the R7 suffix corresponds to the tape and reel packaging format required for automated assembly processes. Ensure compatibility with the intended PCB footprint and soldering profile for the 8-lead MSOP package.

Selection Notes

Select this component when ultra-low DC error and minimal power consumption are critical constraints. The zero-drift technology eliminates the need for external chopper stabilization circuits. Verify that the 125 kHz bandwidth meets the signal frequency requirements and that the 1.8 V minimum supply voltage aligns with the system power budget.

Part Context

This part belongs to the ADA4051 series of CMOS micropower zero-drift amplifiers. The -2 suffix indicates a dual-channel configuration within the same family as the single-channel ADA4051-1. It shares the same core chopping architecture and electrical characteristics but provides two independent amplifiers in a compact surface-mount package.

Replacement Considerations

Check for direct pin-compatible alternatives within the Analog Devices zero-drift portfolio. Verify that any substitute maintains the 1.8 V to 5.5 V supply range and similar offset voltage specifications to ensure circuit performance continuity.

FAQ

How does the ADA4051-2 handle offset-related ripple?

It employs an autocorrection feedback loop and a switched-capacitor notch filter synchronized with the chopping clock to suppress offset-related ripple without disturbing the desired input signal.

What is the input voltage noise density at 1 kHz?

The input voltage noise density is typically 95 nV/√Hz at 1 kHz.