AD811JR

Overview

The AD811JR is a high-speed current feedback operational amplifier from Analog Devices, optimized for broadcast-quality video systems. It features a 140 MHz bandwidth at unity gain and a 2500 V/µs slew rate. The device operates on ±5 V to ±18 V supplies with a quiescent current of 16.5 mA at ±15 V. Key specifications include 3 mV maximum input offset voltage, 1.9 nV/√Hz voltage noise, and excellent differential gain and phase performance (0.01% and 0.01°). It is housed in an 8-lead SOIC package.

Feature Summary

• High-speed current feedback architecture maintaining wide bandwidth across various gains
• Optimized for broadcast-quality video with minimal differential gain and phase errors
• Capable of driving multiple back-terminated 75 Ω cables simultaneously
• Low distortion characteristics suitable for precision data acquisition buffers

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 applications

Procurement Notes

Verify the specific grade suffix against the datasheet ordering guide, as the AD811JR is specified for ±5 V operation only, with limits up to ±12 V. Confirm that the 8-lead SOIC package matches the design requirements. Ensure power supply constraints are strictly observed to prevent exceeding absolute maximum ratings. Check for MIL-STD-883B availability if military-grade testing is required.

Selection Notes

Select this component when a current feedback amplifier is required for high-frequency video or pulsed signal processing. It is ideal for applications demanding fast settling times and low distortion at frequencies up to 10 MHz. Consider the ±5 V to ±18 V operating range and the need for careful PCB layout to manage parasitic capacitance and inductance for optimal gain flatness.

Part Context

The AD811 series includes variants such as the AD811J, AD811A, and AD811S, differentiated by temperature ranges and supply voltage specifications. The AD811JR specifically denotes the commercial grade in an 8-lead SOIC package. Other packages available include CERDIP, PDIP, and LCC configurations for different thermal and mechanical needs.

Replacement Considerations

Direct substitutes within the same family include the AD811AR (16-lead SOIC) and AD811SJ (military grade). Verify pin compatibility and electrical specifications before substitution, particularly regarding the limited supply voltage range of the JR variant compared to other grades.