ADA4528-2ACPZ-RL

Overview

The ADA4528-2ACPZ-RL is a dual-channel, precision, ultralow noise, zero-drift operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output capabilities and operates on single supplies from 2.2 V to 5.5 V or dual supplies from ±1.1 V to ±2.75 V. The device exhibits a maximum offset voltage of 2.5 µV and a drift of 0.015 µV/°C. Voltage noise density is 5.6 nV/√Hz at 1 kHz, with 97 nV p-p in the 0.1 Hz to 10 Hz band. It provides a minimum open-loop gain of 130 dB, CMRR of 135 dB, and PSRR of 130 dB. The unity-gain crossover frequency is 4 MHz, with a gain bandwidth product of 3 MHz at AV = +100. It is specified over an operating temperature range of −40°C to +125°C.

Feature Summary

• Ultralow noise performance with minimal low-frequency flicker noise
• Zero-drift architecture utilizing chopping techniques for high DC accuracy
• Rail-to-rail input and output swing capability
• High common-mode rejection and power supply rejection ratios

Applications

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

Procurement Notes

Verify the specific package type against the datasheet, as the part number suffix indicates reel packaging. Confirm that the dual-channel configuration matches the design requirements. Ensure the operating environment stays within the specified industrial temperature range. Check for any recent revision updates to the data sheet that may affect electrical characteristics or pin configurations.

Selection Notes

Select this component when both low noise and high DC precision are required simultaneously. The dual-channel format allows for cost-effective implementation of differential sensing circuits. Consider the supply voltage constraints, as the device supports both single and dual supply architectures. Evaluate the need for rail-to-rail operation to maximize dynamic range in low-voltage applications.

Part Context

This device belongs to the ADA4528 family of zero-drift operational amplifiers. It is the dual-channel variant of the ADA4528-1. The family includes micropower and low-power options for different efficiency requirements. Analog Devices utilizes a patented chopping technique in this series to achieve near-zero offset voltage drift.

Replacement Considerations

The ADA4528-1 serves as the single-channel equivalent within the same family. Other devices in the portfolio include the ADA4051 and AD8628 series for varying power and voltage specifications.