AD818ARZ

Overview

The AD818ARZ is a low-cost, low-power video operational amplifier manufactured by Analog Devices Inc. It features a 130 MHz -3 dB bandwidth at a gain of +2 and a 55 MHz 0.1 dB bandwidth under the same conditions. The device delivers a slew rate of 500 V/µs and settles to 0.01% within 80 ns for a 10 V step. It operates on single supplies from +5 V to +36 V or dual supplies from ±5 V to ±15 V, drawing a maximum quiescent current of 7.5 mA. The input offset voltage is specified at a maximum of 2 mV, with an input bias current of 6.6 µA. It provides a minimum output drive current of 50 mA and is housed in an 8-lead SOIC package.

Feature Summary

• Optimized for high-speed video applications requiring gains equal to or greater than +2 or -1.
• Capable of driving back-terminated cables with high output current capability.
• Supports flexible power supply configurations including single +5 V and dual ±5 V to ±15 V operation.
• Features low differential gain and phase errors suitable for professional video equipment.

Applications

• Video cameras
• Professional video equipment
• Video monitors
• CATV systems
• Color copiers

Procurement Notes

Verify that the component matches the specific AD818ARZ part number and ordering suffix. Confirm the package type is 8-lead SOIC_N and check RoHS compliance status as indicated by the Z suffix. Ensure the operating temperature range meets the requirement of -40°C to +85°C. Cross-reference the manufacturer date code and lot number against quality assurance requirements. Validate authenticity through authorized distribution channels to avoid counterfeit components.

Selection Notes

Select this component when designing circuits that require high output drive capability for driving terminated loads such as 75 Ω cables. It is suitable for applications needing low power consumption alongside high speed performance. Consider the voltage feedback architecture and the need for external compensation if driving heavy capacitive loads. Evaluate the single-supply functionality if power dissipation constraints are critical in the system design.

Part Context

The AD818 series includes variants such as the AD818AN and AD818AR, differing primarily in packaging. The AD818ARZ specifically denotes the surface-mount SOIC version with RoHS compliance. It belongs to the family of low-cost video op amps designed for demanding yet power-sensitive applications. Other related parts may include evaluation boards like the AD818AR-EBZ for circuit testing.

Replacement Considerations

Direct pin-compatible replacements within the same package and electrical specifications should be verified against the official datasheet. Substitutes must match the 130 MHz bandwidth and 50 mA output current capabilities. Check for equivalent settling times and differential gain/phase error specifications to ensure signal integrity is maintained in video applications.

FAQ

What is the maximum differential input voltage?

The absolute maximum rating for differential input voltage is ±6 V.

Can the AD818ARZ operate with a single power supply?

Yes, it is fully specified for operation with a single +5 V supply up to +36 V.

What is the typical differential gain error at NTSC frequencies?

The differential gain error is typically 0.005% and maximally 0.01% at the 3.58 MHz NTSC subcarrier frequency with a ±15 V supply.