AD8609AR-REEL

Overview

The AD8609AR-REEL is a quad precision operational amplifier from Analog Devices, featuring rail-to-rail input and output capabilities. It operates on a single supply of 1.8 V to 5 V or dual supplies of ±0.9 V to ±2.5 V. Key electrical specifications include a maximum offset voltage of 50 µV, a maximum input bias current of 1 pA, and a typical noise density of 22 nV/√Hz at 10 kHz. The device consumes a maximum of 50 µA per amplifier and offers a gain bandwidth product of 400 kHz. It 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 with low distortion characteristics

Applications

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

Procurement Notes

Verify the specific reel quantity associated with the REEL suffix against the manufacturer's ordering guide. Confirm RoHS compliance status indicated by the Z suffix if required. Ensure the 14-lead SOIC package dimensions match the design footprint requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring high precision and low power consumption in portable devices. The quad configuration allows multiple channels in a single package. Consider the 14-lead SOIC package for standard surface mount assembly processes. Evaluate the 50 µA supply current against total system power budgets.

Part Context

This part belongs to the AD8603/AD8607/AD8609 series of micro-power, low-noise CMOS operational amplifiers. The AD8609 specifically provides four independent amplifier channels within one integrated circuit. This series shares core technologies such as patented trimming and rail-to-rail performance across single, dual, and quad channel variants.

Replacement Considerations

Official substitutes within the same family include the AD8603 for single-channel and AD8607 for dual-channel requirements. These parts share identical electrical characteristics and pinout compatibility where applicable. Verify package availability and reel quantities when substituting between different channel counts.

FAQ

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

No, the AD8609 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 input bias current specification for the AD8609?

The maximum input bias current is 1 pA at 25°C, increasing to 50 pA over the extended temperature range of -40°C to +85°C, and 500 pA up to +125°C.