AD8609ARUZ-REEL

Overview

The AD8609ARUZ-REEL is a quad precision micro-power 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 characteristics 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. The device consumes a maximum of 50 µA per amplifier channel and offers a gain bandwidth product of 400 kHz. It is housed in a 14-lead TSSOP package with a tape-and-reel packing configuration.

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 feedback configurations

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and reel quantity. Confirm RoHS compliance status as indicated by the Z suffix in the part number. Cross-reference the temperature range specifications with application requirements before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring low power consumption alongside high precision. The quad configuration reduces board space compared to individual amplifiers. Ensure the system voltage falls within the specified 1.8 V to 5 V range. Consider the 14-lead TSSOP package dimensions for PCB layout constraints.

Part Context

This device belongs to the AD8603/AD8607/AD8609 family of precision CMOS amplifiers. The AD8609 specifically provides four independent channels in a single package. It shares core technologies like low noise and micropower operation with its single-channel (AD8603) and dual-channel (AD8607) counterparts.

Replacement Considerations

Official substitutes within the same family include the AD8603AUJZ-R2 and AD8607ARMZ-REEL. Verify pin compatibility and package dimensions when substituting between different channel counts or package types.

FAQ

Does the AD8609 exhibit phase reversal during overdrive conditions?

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?

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.