AD8609ARZ-REEL7

Overview

The AD8609ARZ-REEL7 is a quad micro-power, low noise CMOS operational amplifier from Analog Devices. It features rail-to-rail input and output capabilities with a maximum offset voltage of 50 µV and input bias current of 1 pA. The device operates on single supplies from 1.8 V to 5 V or dual supplies from ±0.9 V to ±2.5 V. It consumes a maximum supply current of 50 µA per amplifier and offers a gain bandwidth product of 400 kHz. This component is housed in a 14-lead SOIC package.

Feature Summary

• Patented trimming technique achieves superior precision without laser adjustment
• Rail-to-rail input and output swing capability for wide dynamic range
• No phase reversal even when input exceeds common-mode voltage limits
• Unity gain stable design suitable for direct buffering applications

Applications

• Battery-powered instrumentation systems
• Multipole filter circuits
• Capacitive and inductive sensors
• Low power ASIC input or output amplifiers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging configuration. Confirm that the RoHS compliant marking code matches project requirements. Cross-reference the temperature range and package dimensions with the latest datasheet revision to avoid integration errors during procurement.

Selection Notes

Select this component for designs requiring low power consumption alongside high precision in portable applications. The rail-to-rail performance allows for maximum signal swing in low voltage single-supply systems. Ensure the load capacitance is managed appropriately to maintain stability, as the device can drive significant capacitive loads without oscillation.

Part Context

This part belongs to the AD8603/AD8607/AD8609 family of precision micropower amplifiers. While sharing core electrical characteristics, the AD8609 specifically integrates four independent channels within a single package. This configuration distinguishes it from the single-channel AD8603 and dual-channel AD8607 variants, offering higher channel density for multi-sensor interfaces.

Replacement Considerations

Official substitutes include other members of the AD8603/AD8607/AD8609 series such as the AD8607ARZ-REEL7 for dual-channel needs or the AD8609ARUZ for TSSOP packaging options. Verify pin compatibility and thermal characteristics before substitution.

FAQ

Does the AD8609 exhibit phase reversal if the input voltage exceeds the common-mode range?

No, the device does not exhibit phase inversion even when the input voltage exceeds the maximum input common-mode voltage, handling voltages up to 1 V over the supply.

What is the maximum supply current consumption per amplifier?

The maximum supply current is 50 µA per amplifier at 25°C, increasing to 60 µA across the full operating temperature range.