AD9631ARZ

Overview

The AD9631ARZ is a high-speed, wide-bandwidth voltage feedback operational amplifier manufactured by Analog Devices Inc. It operates within an industrial temperature range of -40°C to +85°C and is housed in an 8-lead SOIC package. The device features a small-signal bandwidth of 320 MHz and a large-signal bandwidth of 175 MHz at a gain of +1. Key electrical specifications include a slew rate of 1300 V/µs, a settling time of 16 ns to 0.01% for a 2 V step, and a typical input voltage noise density of 7.0 nV/√Hz. It requires dual power supplies ranging from ±3 V to ±6 V with a quiescent current of approximately 17 mA.

Feature Summary

• Combines the fast pulse response and wide bandwidth of current feedback amplifiers with the predictable stability and balanced high-impedance inputs of voltage feedback architectures.
• Delivers ultralow harmonic distortion and low noise, making it suitable for demanding signal processing applications requiring high linearity.
• Provides exceptional transient performance with a 1300 V/µs slew rate and rapid settling times, ensuring accurate reproduction of fast-changing signals.

Applications

• ADC input driver
• Differential amplifiers
• IF/RF amplifiers
• Pulse amplifiers
• DAC current to voltage conversion

Procurement Notes

Verify the specific suffix 'ARZ' corresponds to the industrial temperature grade (-40°C to +85°C) and SOIC-8 package configuration as defined in the official Analog Devices ordering guide. Confirm that the component meets RoHS compliance standards required for your manufacturing process. Cross-reference the manufacturer part number with authorized distributor catalogs to ensure authenticity and traceability before finalizing procurement.

Selection Notes

Select the AD9631ARZ when a unity-gain stable voltage feedback amplifier is required for applications demanding high bandwidth and low distortion. Ensure the design accommodates the recommended feedback resistor value of 140 Ω for optimal dynamic performance at G = +1. Verify that the power supply bypassing strategy includes appropriate capacitance values to maintain stability and minimize distortion during high-frequency operation.

Part Context

The AD9631ARZ belongs to the AD9631/AD9632 family of ultralow distortion, wide bandwidth voltage feedback op amps. While the AD9631 is unity gain stable, its counterpart, the AD9632, is stable at gains of 2 or greater. Both devices share similar architectural benefits, offering a proprietary design that merges the best characteristics of current and voltage feedback topologies for superior overall system performance.

Replacement Considerations

The AD9632 is the related gain-of-2 stable variant within the same product family. No other direct public substitute part numbers are confirmed in the provided documentation.