ADA4637-1ACPZ-RL

Overview

The ADA4637-1ACPZ-RL is a decompensated JFET operational amplifier from Analog Devices Inc., designed for high-speed precision applications. It features a gain bandwidth product of 79 MHz and a slew rate of 170 V/µs. The device operates on dual supplies ranging from ±5 V to ±15 V, with an extended industrial temperature range of −40°C to +125°C. Key electrical characteristics include a maximum offset voltage of 200 µV, typical drift of 1 µV/°C, and very low input bias current of 5 pA maximum. Voltage noise density is 6.1 nV/√Hz at 1 kHz.

Feature Summary

• Decompensated architecture ensuring stability at noise gains of 5 or greater
• JFET input stage providing extremely low input bias current and leakage
• High open-loop gain and common-mode rejection ratio for precision signal processing
• Integrated offset adjust pins in SOIC package for fine-tuning DC accuracy

Applications

• Photodiode amplifiers
• Phase-locked loop filters
• Precision instrumentation
• High-end professional audio equipment
• DAC output amplifiers

Procurement Notes

Verify the specific suffix 'ACPZ-RL' against the manufacturer's ordering guide to confirm the LFCSP package type and tape-and-reel quantity. Ensure the design supports a minimum noise gain of 5 due to the decompensated nature of the ADA4637-1. Confirm that the PCB layout accommodates the exposed pad thermal requirements for the LFCSP package.

Selection Notes

Select this component when high speed and precision are required simultaneously. Unlike the unity-gain stable ADA4627-1, the ADA4637-1 offers superior bandwidth but requires a closed-loop gain of 5 or higher. It is suitable for applications demanding low noise and low bias current without the need for rail-to-rail inputs.

Part Context

The ADA4637-1 belongs to the ADA4627-1/ADA4637-1 family of wide bandwidth precision amplifiers. It serves as the decompensated counterpart to the ADA4627-1, sharing similar DC specifications but offering significantly higher AC performance. This family combines the best attributes of precision DC and high-speed AC op amps.

Replacement Considerations

The ADA4627-1 is the unity-gain stable version within the same family. If a gain of less than 5 is required, the ADA4627-1 must be used instead. No direct pin-compatible substitutes are listed in the provided documentation.