ADA4051-2ACPZ-RL

Overview

The ADA4051-2ACPZ-RL is a dual-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 15 μV maximum and offset drift of 20 nV/°C. Key electrical parameters include a typical supply current of 13 μA per amplifier, a gain bandwidth product of 125 kHz, and a minimum power supply rejection ratio (PSRR) of 110 dB. It is housed in an 8-lead LFCSP package and is specified for operation within the extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Utilizes an innovative chopping technique to suppress offset-related ripple without increasing in-band noise.
• Provides rail-to-rail input and output swing capability while maintaining unity-gain stability.
• Delivers high precision with very low offset voltage and minimal offset drift across the operating temperature range.
• Designed for extreme power efficiency with micropower consumption suitable for battery-powered applications.

Applications

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

Procurement Notes

Verify that the specific ordering suffix corresponds to the required tape and reel packaging configuration. Confirm the package type matches the design requirements, as the component is available in multiple form factors. Ensure the selected variant meets the necessary thermal and electrical specifications for the intended application environment before finalizing procurement.

Selection Notes

Select this component when high DC precision and low power consumption are critical constraints. The zero-drift architecture makes it suitable for applications requiring accurate signal conditioning over wide temperature ranges. Consider the trade-off between the low quiescent current and the limited slew rate when designing for dynamic signal performance.

Part Context

This device belongs to the ADA4051 series of CMOS micropower zero-drift operational amplifiers offered by Analog Devices. The series includes single-channel variants like the ADA4051-1 and dual-channel versions such as the ADA4051-2. These amplifiers are designed to provide high accuracy in low-power environments, leveraging advanced chopper stabilization technology to minimize offset errors.

Replacement Considerations

Direct replacements within the same family include the ADA4051-2ARMZ for MSOP packaging or the ADA4051-2ACPZ for LFCSP packaging without the reel suffix. Verify pin compatibility and thermal characteristics when substituting packages.

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 null initial offset in the DC domain, preventing ripple at the overall output.

What is the input voltage range specification?

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