AD8604DRU-REEL

Overview

The AD8604DRU-REEL 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 8.4 MHz gain bandwidth product and a slew rate of 6 V/µs at 5 V supplies. Key electrical specifications include a maximum offset voltage of 6000 µV for the D grade, input bias current of 200 pA, and low voltage noise density of 33 nV/√Hz. It is housed in a 14-lead TSSOP package.

Feature Summary

• Rail-to-rail input and output stages maximize dynamic range in single-supply systems.
• DigiTrim technology provides post-package trimming for superior DC precision without laser trimming.
• CMOS architecture ensures very low input bias currents suitable for high source impedance applications.
• Unity-gain stable design eliminates phase reversal during overdrive conditions.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel specifications. Ensure the component grade matches the required DC precision parameters, as variations exist between A and D grades. Confirm that the intended operating temperature range aligns with the specified industrial limits. Cross-reference the datasheet revision to validate all electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a quad configuration is required alongside rail-to-rail performance and wide bandwidth. The D grade offers cost-effective AC performance with relaxed DC precision compared to the A grade. Consider the 14-lead TSSOP package for surface-mount assembly requirements. Evaluate the 750 µA supply current consumption against battery life constraints in portable designs.

Part Context

This part belongs to the AD860x family of precision amplifiers, which includes single (AD8601), dual (AD8602), and quad (AD8604) variants. The family utilizes Analog Devices' patented DigiTrim technology to achieve low offset voltages. The AD8604 specifically integrates four independent amplifiers in a compact footprint, designed for applications requiring multiple signal conditioning channels.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the AD8602 (dual channel) or AD8601 (single channel) if fewer channels are acceptable. Verify that any alternative maintains the required rail-to-rail input/output capability and unity-gain stability.

FAQ

Does the AD8604 exhibit phase reversal when the input exceeds the common-mode range?

No, the AD8604 is designed with no phase reversal characteristics, ensuring stable operation even during overdrive conditions.

How does the D grade differ from the A grade regarding offset voltage?

The D grade has a higher maximum offset voltage specification (up to 6000 µV) compared to the A grade (up to 1100 µV), offering lower DC precision at a reduced cost point.