AD8668ARZ-REEL7

Overview

The AD8668ARZ-REEL7 is a quad, low-cost, rail-to-rail output amplifier from Analog Devices. It operates on single supplies from 5 V to 16 V or dual supplies of ±2.5 V to ±8 V. Key electrical parameters include a maximum offset voltage of 2.5 mV, input bias current of 1 pA, and a gain-bandwidth product of 4 MHz. The device provides a slew rate of 3.5 V/µs and exhibits low noise characteristics with a density of 8 nV/√Hz at 10 kHz. It functions within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Rail-to-rail output capability for maximizing dynamic range in single-supply systems.
• Low input bias current suitable for high-impedance sensor interfacing.
• Unity-gain stable operation without external compensation components.
• Extended operating supply voltage range up to 16 V.

Applications

• Sensor amplification
• Photodiode amplification
• ADC driver circuits
• Medical equipment signal conditioning

Procurement Notes

Verify the package type matches the specific suffix; the ARZ variant utilizes a 14-Lead SOIC_N (R-14) package. Confirm RoHS compliance status as indicated by the Z suffix. Ensure the REEL7 designation aligns with required tape-and-reel quantities for automated assembly processes. Cross-reference the automotive qualification requirements if applicable, noting that standard commercial models differ from W-series variants.

Selection Notes

Select this component when a quad configuration is required alongside rail-to-rail output swing and low power consumption. It serves as a cost-effective alternative to JFET amplifiers in applications demanding low input bias currents. Consider the AD8661/AD8662 families if lower offset voltages are necessary, as this model prioritizes wide supply range and low noise over ultra-low offset specifications.

Part Context

This part belongs to the AD866x family of precision amplifiers designed for cost-sensitive applications. The AD8668 specifically integrates four independent amplifier channels within a single package. It complements the single-channel AD8665 and dual-channel AD8666 models, providing a scalable solution for multi-channel signal processing tasks requiring wide bandwidth and low noise performance.

Replacement Considerations

Public confirmed substitute part numbers: AD8668ARUZ-REEL (TSSOP-14 package equivalent).