ADA4500-2ARMZ-R7

Overview

The ADA4500-2ARMZ-R7 is a dual-channel precision operational amplifier featuring rail-to-rail input and output capabilities. It operates on a single supply from 2.7 V to 5.5 V or dual supplies of ±1.35 V to ±2.75 V. The device offers a gain bandwidth product of 10 MHz, an offset voltage maximum of 120 μV at 25°C, and a low noise density of 14.5 nV/√Hz. It utilizes a zero-crossover distortion topology for high linearity across the full common-mode range.

Feature Summary

• Zero-input crossover distortion circuit topology ensures high linearity over the full rail-to-rail input common-mode range without traditional complementary stage distortion.
• Rail-to-rail input and output swings maximize dynamic range when driving analog-to-digital converters or other signal conditioning stages.
• Low power consumption with supply current per amplifier typically around 1.65 mA, suitable for portable and battery-operated applications.

Applications

• Pressure and position sensors
• Medical monitors
• Process controls
• Photodiode applications

Procurement Notes

Verify the specific suffix R7 indicates tape and reel packaging when sourcing. Confirm the component meets RoHS standards as specified in the manufacturer documentation. Ensure the operating environment remains within the extended industrial temperature range of -40°C to +125°C for guaranteed performance parameters.

Selection Notes

Select this component for applications requiring high precision and wide bandwidth in low-voltage single-supply systems. The rail-to-rail I/O capability makes it ideal for interfacing directly with ADCs. Consider the 8-lead MSOP package constraints regarding thermal resistance if high load currents are expected.

Part Context

This part belongs to the ADA4500-2 series of dual precision amplifiers manufactured by Analog Devices Inc. It is designed to replace older precision op amps that suffer from crossover distortion near the supply rails. The ARMZ suffix denotes the specific MSOP package variant available in reel packaging.

Replacement Considerations

Direct replacements include the ADA4500-2ACPZ-R7 (LFCSP package) or non-reel variants like the ADA4500-2ARMZ. Verify pin compatibility and package dimensions before substitution.

FAQ

How does the ADA4500-2 eliminate crossover distortion?

It employs an on-chip charge pump in its input structure to power the differential pair, allowing the input voltage to vary from one supply rail to the other without the distortion typical of dual differential pair topologies.

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

The inputs operate rail-to-rail and can extend up to 200 mV beyond the supply rails, ensuring functionality even if the input signal slightly exceeds the supply voltage.