ADA4528-1ACPZ-R7

Overview

The ADA4528-1ACPZ-R7 is a precision, ultralow noise, zero-drift operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output capabilities and operates on a single supply voltage ranging from 2.2 V to 5.5 V or dual supplies of ±1.1 V to ±2.75 V. The device offers a maximum offset voltage of 2.5 µV and a drift of 0.015 µV/°C. Key electrical parameters include a unity-gain crossover frequency of 4 MHz, a gain bandwidth product of 3 MHz at AV = +100, and a -3 dB closed-loop bandwidth of 6.2 MHz. It provides a minimum open-loop gain of 130 dB, CMRR of 135 dB, and PSRR of 130 dB. Supply current is typically 1.5 mA per amplifier.

Feature Summary

• Ultralow noise architecture with 5.6 nV/√Hz voltage noise density at 1 kHz
• Zero-drift technology utilizing chopping technique for minimal offset voltage and drift
• Rail-to-rail input and output swing capability for maximum dynamic range
• High precision specifications including 130 dB minimum open-loop gain and 135 dB minimum CMRR

Applications

• Thermocouple and thermopile signal conditioning
• Load cell and bridge transducer amplification
• Precision instrumentation systems
• Electronic scales
• Medical instrumentation devices

Procurement Notes

Verify the specific package type matches the design requirements, as the ADA4528-1 family includes both MSOP and LFCSP options. Confirm that the ordering suffix corresponds to the desired tape and reel packaging format. Ensure the component revision aligns with the latest datasheet specifications for accurate performance characteristics. Cross-reference the manufacturer part number with authorized distributor listings to guarantee authenticity and traceability.

Selection Notes

Select this component for applications requiring high DC accuracy and low noise without external trimming. The zero-drift architecture eliminates the need for periodic calibration in long-term stability scenarios. Consider the supply voltage range when designing power rails, ensuring operation within the 2.2 V to 5.5 V limits. Evaluate thermal management needs based on the selected package's thermal resistance characteristics for optimal reliability.

Part Context

The ADA4528-1ACPZ-R7 belongs to the ADA4528 series of precision operational amplifiers designed for high-performance analog signal processing. It complements other zero-drift amplifiers in the Analog Devices portfolio by offering a balance of ultralow noise and precision. The ACPZ suffix indicates the 8-lead LFCSP package variant, distinguishing it from the MSOP version. This series is engineered for demanding applications where signal integrity and stability are critical.

Replacement Considerations

Direct replacements within the same family include the ADA4528-2 for dual-channel configurations. Verify pin compatibility and electrical specifications when substituting with other zero-drift amplifiers. Ensure that alternative components meet the required noise density and offset voltage drift specifications for the specific application context.