AD8608ARUZ-REEL

Overview

The AD8608ARUZ-REEL is a quad precision CMOS operational amplifier manufactured by Analog Devices. It features rail-to-rail input and output capabilities, making it suitable for single-supply applications ranging from 2.7 V to 5.5 V. Key electrical specifications include a maximum offset voltage of 75 µV, low input bias current of 1 pA, and a voltage noise density of 8 nV/√Hz. The device offers a unity-gain bandwidth of 10 MHz and a slew rate of 5 V/µs. It is housed in a 14-lead TSSOP package and operates within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Utilizes patented DigiTrim trimming technique for superior precision without laser trimming
• Provides rail-to-rail input and output operation on a single supply
• Features very low input bias currents and low offset voltage for high accuracy
• Delivers wide signal bandwidth with low distortion characteristics

Applications

• Photodiode amplification circuits
• Battery-powered instrumentation systems
• Multipole filter designs
• High impedance sensor interfaces
• Barcode scanners and audio applications

Procurement Notes

Verify the specific REEL suffix indicates tape-and-reel packaging when sourcing this component. Confirm that the ordering code matches the exact quad configuration and TSSOP package type required for your design. Ensure compatibility with the specified voltage and temperature ranges for your intended environment.

Selection Notes

Select this component for applications requiring high DC precision combined with AC performance. The combination of low noise, wide bandwidth, and rail-to-rail I/O makes it ideal for portable devices. Consider the 14-lead TSSOP footprint constraints and verify thermal dissipation requirements against the junction-to-ambient resistance values provided in the datasheet.

Part Context

This part belongs to the AD8605/AD8606/AD8608 family of precision, low-noise CMOS operational amplifiers. While the AD8605 is a single amplifier and the AD8606 is a dual, the AD8608 specifically integrates four amplifiers on a single chip. All variants share the same core technology and performance characteristics, differing primarily in channel count and package options.

Replacement Considerations

Official substitutes within the same family include the AD8605 and AD8606, though these offer different channel counts. Ensure any replacement maintains the quad configuration and TSSOP-14 package if pinout compatibility is critical. Verify that alternative parts meet the same 75 µV max offset voltage and 1 pA bias current specifications.

FAQ

Does the AD8608 exhibit output phase reversal?

No, the AD8608 does not exhibit output phase reversal even when inputs exceed the supply voltage by more than 2 V.

What is the maximum input offset voltage for the AD8608?

The maximum input offset voltage is 75 µV at VS = 3.5 V and 300 µV over the full temperature range.

Is the AD8608 unity gain stable?

Yes, the AD8608 is unity gain stable with a phase margin of 65 degrees at 5 V supply.