AD811AN

Overview

The AD811AN is a high-performance, wideband current feedback operational amplifier manufactured by Analog Devices Inc. Optimized for broadcast-quality video systems, it features a 140 MHz bandwidth at unity gain and a 2500 V/µs slew rate. The device supports flexible operation with supply voltages ranging from ±4.5 V to ±18 V, drawing a quiescent current of approximately 16.5 mA at ±15 V. It offers excellent DC precision with a maximum input offset voltage of 3 mV and low distortion characteristics, making it suitable for demanding analog signal processing tasks.

Feature Summary

• High-speed current feedback architecture providing stable bandwidth across varying gains
• Ultra-low differential gain and phase errors ensuring high-fidelity video signal integrity
• Robust output drive capability supporting multiple back-terminated loads
• Low voltage noise density for high dynamic range applications

Applications

• Video crosspoint switchers and multimedia broadcast systems
• HDTV compatible systems and video line drivers
• ADC/DAC buffers in data acquisition systems
• DC restoration circuits and medical imaging equipment

Procurement Notes

Verify the specific grade suffix (e.g., J or A) against project requirements, as operating temperature ranges differ between commercial and extended industrial specifications. Confirm package availability matches the design footprint, as the component is offered in multiple form factors including plastic DIP, SOIC, and CERDIP. Ensure power supply bypassing capacitors are placed close to the pins to maintain stability given the high slew rate capabilities.

Selection Notes

Select this component when circuit topology requires a current feedback amplifier to maintain constant bandwidth regardless of closed-loop gain settings. It is appropriate for designs needing high output current to drive heavy capacitive loads or multiple transmission lines without external buffering. Consider the thermal dissipation limits if operating near maximum supply voltages in compact plastic packages.

Part Context

This part belongs to the AD811 family of high-speed video amplifiers designed by Analog Devices. The family includes variants such as the AD811J for commercial temperature ranges and the AD811S for military specifications. These devices share the same internal transistor count and core architecture but differ in testing standards and environmental tolerance levels defined by their respective ordering codes.

Replacement Considerations

Public confirmed substitute part numbers: None.