ADA4528-2ARMZ-R7

Overview

The ADA4528-2ARMZ-R7 is a dual-channel, precision, ultralow noise, zero-drift operational amplifier featuring rail-to-rail input and output swing. It operates on single supplies from 2.2 V to 5.5 V or dual supplies from ±1.1 V to ±2.75 V. Key electrical specifications include a maximum offset voltage of 2.5 µV, an offset voltage drift of 0.015 µV/°C, and a typical voltage noise density of 5.9 nV/√Hz at 1 kHz. The device provides a gain bandwidth product of 3.4 MHz, a slew rate of 0.5 V/µs, and a minimum open-loop gain of 130 dB. It is housed in an 8-lead MSOP package.

Feature Summary

• Patented chopper stabilization architecture eliminates low-frequency flicker noise and minimizes DC errors.
• Rail-to-rail input and output capability allows operation across the full supply voltage range.
• High common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) ensure signal integrity under varying conditions.

Applications

• Thermocouple and thermopile signal conditioning
• Load cell and bridge transducer amplification
• Precision instrumentation and electronic scales
• Medical instrumentation front ends

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm the reel packaging configuration. Ensure the component meets all relevant environmental compliance standards required for the target application before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high DC accuracy combined with ultralow broadband noise. The wide supply voltage range supports both single-supply and dual-supply designs. Verify that the load capacitance requirements are met to maintain stability without oscillation.

Part Context

This part belongs to the ADA4528 family of zero-drift operational amplifiers manufactured by Analog Devices Inc. The family includes single-channel variants like the ADA4528-1 and dual-channel versions such as the ADA4528-2. These devices utilize advanced chopper-stabilized technology to achieve superior precision compared to standard CMOS op amps.

Replacement Considerations

Direct pin-compatible replacements within the same series include the ADA4528-1 for single-channel applications. Other Analog Devices zero-drift amplifiers may serve as functional alternatives if package constraints or specific performance metrics differ.

FAQ

Does the ADA4528-2 have internal ESD protection?

Yes, the device includes internal ESD protection diodes connected between the inputs and each supply rail to protect the input transistors during electrostatic discharge events.

What is the maximum input voltage relative to the supply rails?

The inputs can withstand voltages up to approximately 300 mV beyond the supply rails without causing permanent damage, provided the input current is limited.