AD8604WARZ

Overview

The AD8604WARZ is a quad precision CMOS operational amplifier featuring rail-to-rail input and output capabilities. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a typical supply current of 750 µA per amplifier. The device offers an 8.2 MHz gain bandwidth product, a slew rate of 5.2 V/µs at 3 V, and a maximum offset voltage of 500 µV. Input bias current is typically 0.2 pA, and it provides a common-mode rejection ratio of 68 dB. The component is housed in a 14-lead SOIC package and supports operation across an extended temperature range.

Feature Summary

• Utilizes DigiTrim technology for post-package trimming to achieve low offset voltage without laser trimming.
• Features true rail-to-rail input architecture using parallel NMOS and PMOS differential pairs.
• Provides rail-to-rail output swing capability suitable for buffering ADCs and DACs.
• Ensures no phase reversal occurs when the input signal exceeds the common-mode range.

Applications

• Current sensing
• Barcode scanners
• PA controls
• Battery-powered instrumentation
• Multipole filters

Procurement Notes

Verify the specific suffix 'W' indicates the SOIC package variant and 'ARZ' denotes the A-grade automotive qualification. Confirm RoHS compliance status through official documentation. Ensure the ordering code matches the required channel count and package dimensions for PCB layout compatibility.

Selection Notes

Select this component for applications requiring high precision and wide bandwidth in single-supply systems. The low input bias current makes it suitable for high source impedance circuits. Consider the thermal resistance characteristics of the SOIC package for heat dissipation requirements in dense layouts.

Part Context

This part belongs to the AD860x family of precision amplifiers, which includes single (AD8601), dual (AD8602), and quad (AD8604) configurations. The family shares core performance specifications such as bandwidth and noise density, differing primarily in channel count and package options like TSSOP or QSOP.

Replacement Considerations

Direct pin-compatible substitutes within the same family include AD8601 and AD8602 variants. Verify that alternative packages maintain the required thermal and electrical characteristics for the specific application environment.

FAQ

How does the DigiTrim technology benefit the AD8604?

DigiTrim allows for post-package trimming of the offset voltage, correcting errors caused by mechanical stresses during assembly without adding extra pins.

What is the behavior of the input stage near the supply rails?

The input stage uses parallel NMOS and PMOS pairs to extend the common-mode voltage range to both supply rails, with a slight transition region where both pairs are active.