AD811SQ/883B

Overview

The AD811SQ/883B is a high-speed video operational amplifier manufactured by Analog Devices Inc. It features a current feedback architecture optimized for broadcast-grade video systems. Key electrical parameters include a -3 dB bandwidth of 140 MHz at unity gain and 120 MHz at a gain of +2. The device exhibits a differential gain error of 0.01% and a differential phase error of 0.01 degrees when driving a 150-ohm load. It achieves a maximum slew rate exceeding 2500 V/µs, with a 0.1% settling time of less than 25 ns for a 2 V step. Input voltage noise density is specified at 1.9 nV/√Hz. The amplifier operates within a rated supply voltage range of ±4.5 V to ±18 V.

Feature Summary

• Optimized for broadcast-quality video applications with low differential gain and phase errors
• Current feedback topology maintains wide bandwidth across varying gain settings
• High slew rate and fast settling times suitable for demanding pulse applications
• Low voltage and current noise characteristics support wide dynamic range requirements

Applications

• Broadcast-grade video signal processing systems
• Analog-to-digital converter (ADC) buffering in data acquisition systems
• Digital-to-analog converter (DAC) buffering
• Pulse generation and conditioning circuits requiring high transient response

Procurement Notes

Verify the specific suffix 'SQ/883B' against official Analog Devices documentation to confirm military-grade qualification and ceramic package specifications. Ensure compatibility with existing circuit designs regarding the CDIP-8 through-hole footprint. Confirm RoHS status and lead content details as required by target assembly standards. Validate that the current feedback input structure aligns with the intended application's stability requirements.

Selection Notes

Select this component when designing video systems requiring precise differential gain and phase performance. The current feedback architecture is advantageous for maintaining bandwidth independence from closed-loop gain. Consider the ±4.5 V to ±18 V supply range for flexibility in system power design. Evaluate the 1.9 nV/√Hz noise density for applications sensitive to signal integrity. Ensure the PCB layout accommodates the CDIP-8 package dimensions and thermal requirements.

Part Context

The AD811 series represents a family of high-speed video amplifiers designed by Analog Devices. The SQ/883B designation indicates a specific variant often associated with enhanced reliability or military specifications, housed in an 8-pin ceramic dual in-line package (CDIP). This packaging supports through-hole mounting and provides robust environmental protection compared to standard plastic packages.

Replacement Considerations

Cross-reference with other Analog Devices video amplifiers such as the AD811AR-16 for pin-compatible alternatives in different packages. Verify functional equivalence regarding bandwidth, slew rate, and noise specifications before substitution.