AD9631AN

Overview

The AD9631AN is a high-speed, wide-bandwidth voltage feedback operational amplifier manufactured by Analog Devices Inc. It features a 320 MHz small-signal bandwidth and a 175 MHz large-signal bandwidth at unity gain. The device operates on dual supplies ranging from ±3 V to ±5 V with a quiescent current of 17 mA. Key electrical characteristics include a slew rate of 1300 V/µs, settling time of 16 ns to 0.01%, and an input voltage noise density of 7.0 nV/√Hz. It is housed in an 8-lead PDIP package.

Feature Summary

• Unity gain stable voltage feedback architecture providing predictable design behavior compared to current feedback alternatives.
• Ultralow distortion performance with high third-order intercept for signal integrity preservation.
• High-speed transient response with fast settling times suitable for precision pulse applications.

Applications

• ADC input driver
• Differential amplifiers
• IF/RF amplifiers
• Professional video line drivers

Procurement Notes

Verify the specific ordering suffix 'AN' against the manufacturer's official documentation to confirm the industrial temperature range and PDIP package configuration. Ensure that the required supply voltages align with the specified ±3 V to ±5 V operating range before finalizing procurement orders.

Selection Notes

Select this component when a voltage feedback topology is preferred over current feedback for stability and ease of filter design. It is suitable for applications requiring wide bandwidth and low harmonic distortion, such as driving high-resolution ADCs or professional video signals where phase linearity is critical.

Part Context

The AD9631 series represents an improved performance alternative to previous generations like the AD9621. While the AD9631 is designed for unity gain stability, its sibling, the AD9632, is stable at gains of two or greater. Both share similar high-speed architectures but differ in their minimum stable gain configurations.

Replacement Considerations

The AD9621 is documented as a predecessor model. Verify pin compatibility and gain stability requirements when transitioning between these devices.