AD810AN: High-Performance Current Feedback Amplifier for Video and High-Speed Applications

The AD810AN from Analog Devices Inc. is a premium current feedback amplifier designed for high-speed signal processing, video amplification, and other demanding applications. This integrated circuit (IC) delivers exceptional performance with an 80MHz bandwidth and a remarkable 1000V/ s slew rate. Although now classified as obsolete by the manufacturer, the AD810AN remains a top choice for engineers working on legacy systems or specialized designs requiring reliable high-speed amplification.

Comprehensive Product Overview

Manufacturer and Product Details

• Manufacturer: Analog Devices Inc. (A leading global semiconductor company specializing in data conversion and signal processing technologies)
• Part Number: AD810AN
• Product Line: High-Speed Amplifiers
• First Released: 1990s (Still widely used in professional applications)

Detailed Specifications

• Category: Integrated Circuits (ICs) > Linear - Amplifiers - Video Amps and Modules
• Status: Obsolete (but still available through authorized distributors)
• Package: 8-Pin PDIP (Plastic Dual In-Line Package)
• Mounting: Through-Hole (Excellent for prototyping and industrial applications)

In-Depth Technical Specifications

Performance Characteristics

• Architecture: Current Feedback (Provides better stability at high frequencies compared to voltage feedback)
• Bandwidth (-3dB): 80MHz (Ideal for video bandwidth requirements)
• Slew Rate: 1000V/ s (Ensures excellent transient response)
• Supply Voltage Range: 5V to 18V (Dual Supply), +5V to +36V (Single Supply)
• Quiescent Current: 6.8mA (Low power consumption)
• Output Current: 60mA (Can drive relatively heavy loads)
• Input Noise Voltage: 3.5nV/ Hz (Good noise performance for sensitive applications)
• Operating Temperature: -40 C to +85 C (Industrial grade reliability)

Advanced Applications

The AD810AN excels in numerous high-performance applications:

• Professional Video Equipment: Including broadcast cameras, video switchers, and distribution amplifiers
• Medical Imaging Systems: Ultrasound and other high-speed imaging applications
• Test and Measurement Equipment: High-bandwidth oscilloscopes and signal analyzers
• Communications Infrastructure: RF signal processing and high-speed data transmission
• Military/Aerospace Systems: Radar and surveillance equipment requiring reliable performance

Design Considerations

PCB Layout Recommendations

For optimal performance with the AD810AN:

• Use a ground plane and proper decoupling capacitors near power pins
• Minimize trace lengths for high-frequency signal paths
• Consider controlled impedance routing for video applications
• Use surface mount components where possible to reduce parasitic effects

Thermal Management

While the AD810AN has relatively low power consumption, proper thermal design is still important:

• Ensure adequate air flow in enclosed systems
• Consider using a heatsink for high ambient temperature applications
• Monitor junction temperature in continuous high-output applications

Comparison with Modern Alternatives

While the AD810AN is obsolete, several modern alternatives exist:

• ADA4850: Higher bandwidth (145MHz) and lower power
• AD811: Improved video performance with better differential gain/phase
• LMH6702: Comparable performance in smaller packages

However, the AD810AN remains popular for:

• Legacy system maintenance
• Designs requiring through-hole components
• Applications where its specific characteristics are proven

Purchasing and Availability

Although no longer manufactured by Analog Devices, the AD810AN is available through:

• Authorized distributors with remaining stock
• Specialized obsolete component suppliers
• Certain online marketplaces (verify authenticity carefully)

When purchasing, consider:

• Lead time and minimum order quantities
• Package authenticity and traceability
• Potential need for alternative/replacement components

Technical Support Resources

For engineers working with the AD810AN:

• Original datasheets are available from Analog Devices' website
• Application notes AN-211 and AN-245 provide relevant design guidance
• Online forums often have discussions about implementation challenges
• Some distributors offer technical support for obsolete parts

Conclusion

The AD810AN represents an important milestone in amplifier technology. Its combination of high bandwidth, excellent slew rate, and robust current output makes it still valuable for many applications. While newer devices offer improved specifications, the AD810AN's proven performance and through-hole package ensure its continued use in professional systems.

For engineers requiring this specific component, careful sourcing from reputable suppliers is essential to ensure quality and reliability. When designing new systems, evaluating modern alternatives may provide benefits in performance, power consumption, and footprint.

Whether maintaining legacy equipment or developing specialized new designs, understanding the capabilities and limitations of the AD810AN is key to successful implementation.