AD8643ACPZ-R2

Overview

The AD8643ACPZ-R2 is a quad, low-power, precision JFET input operational amplifier featuring rail-to-rail output capability. It operates on single supplies from 5 V to 26 V or dual supplies of ±2.5 V to ±13 V. Key electrical specifications include a maximum supply current of 250 µA per amplifier, a maximum input bias current of 1 pA, and a maximum offset voltage of 750 µV. The device offers a gain bandwidth product of 2.5 MHz and a slew rate of 2 V/µs at 5 V. It is housed in a 16-lead LFCSP package and functions reliably within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Extremely low input bias current suitable for high-impedance signal sources
• Rail-to-rail output swing with stability under capacitive loads exceeding 500 pF
• Low power consumption enabling efficient thermal management in multichannel designs
• No phase reversal when input signals exceed the common-mode voltage range

Applications

• Photodiode amplifiers
• Precision current sensing
• Medical instrumentation
• Portable audio systems

Procurement Notes

Verify that the component matches the specific CP-16-27 package option and AUA branding code listed in the official ordering guide. Confirm RoHS compliance status as indicated by the Z suffix in the manufacturer's documentation. Ensure the procurement source provides valid traceability for the extended industrial temperature rating.

Selection Notes

Select this component for applications requiring multiple channels with strict power constraints. The quad configuration reduces board space compared to individual single-channel units. Verify that the 2.5 MHz bandwidth meets the system requirements, as it differs slightly from the dual and single-channel variants in the same family.

Part Context

This part belongs to the AD864x series of low-power precision amplifiers manufactured by Analog Devices. It shares core architectural features with the AD8641 (single) and AD8642 (dual) but integrates four independent amplifiers into one package. The series utilizes a patented trimming technique to achieve superior performance without laser trimming.

Replacement Considerations

The AD8643ACPZ-REEL7 is a verified alternative offering identical electrical characteristics and pinout in the same 16-lead LFCSP package, differing only in reel packaging format.