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AD96685:  Ultra Fast ECL Single Comparator

Product Details

The AD96685 and AD96687 are ultrafast voltage comparators. The AD96685 is a single comparator with 2.5 ns propagation delay; the AD96687 is an equally fast dual comparator. Both devices feature 50 ps propagation delay dispersion which is a particularly important characteristic of high speed comparators. It is a measure of the difference in propagation delay under differing overdrive conditions.

A fast, high precision differential input stage permits consistent propagation delay with a wide variety of signals in the common-mode range from -2.5 V to +5 V. Outputs are complementary digital signals fully compatible with ECL 10 K and 10 KH logic families. The outputs provide sufficient drive current to directly drive transmission lines terminated in 50 Ohm to -2 V. A level sensitive latch input is included which permits tracking, track-hold, or sample-hold modes of operation.

The AD96685 and AD96687 are available in both industrial, -25°C to +85°C, and military temperature ranges. Industrial range devices are available in 16-pin DIP, SOIC, and 20-lead PLCC; additionally, the AD96685 is available in a 10-pin, TO-100 metal can.


  • Fast: 2.5 ns Propagation Delay
  • Low Power: 118 mW per Comparator
  • Packages: DIP, SOIC, PLCC
  • Power Supplies: +5 V, –5.2 V
  • Logic Compatibility: ECL
  • 50 ps Delay Dispersion

Functional Block Diagram for AD96685


Title Content Type File Type
AD96685: Military Data Sheet  (Rev C, 04/1993) (pdf) Data Sheets PDF
AD96685/AD96687: Ultra Fast ECL Comparator Data Sheet  (Rev D, 02/2002) (pdf, 99 kB) Data Sheets PDF
AN-25: Applying the OP06 Op Amp As a High Precision Comparator  (pdf, 200 kB) Application Notes PDF
AN-352: High Speed Comparators Provide Many Useful Circuit Functions When Used Correctly  (pdf, 283 kB) Application Notes PDF
ADI Warns Against Misuse of COTS Integrated Circuits  (pdf, 13 kB)
(Revised 1/03)
Invites Customer Participation in Creative Mil/Aero System Solutions
Recommended Reading PDF
Standard Space Level Products Program  (pdf, 39 kB)
This brochure describes the standard flow and how to order Analog Devices, Inc. standard product for Space Level not available as JAN, or QML. It replaces the Standard Class S brochure.
Aerospace Information PDF
Space Qualified Parts List  (pdf, 93 kB)
This document lists 67 (240+) space level products that are available from Analog Devices. Many of the products listed are state-of-the-art data conversion and signal processing products that were previously only available as commercial or military Class B products. Through our Space Products Group and MIL-PRF-38535 certified Level V (Class S) facility, we are pleased to offer these products to the space marketplace.
Aerospace Information PDF
Comparators Product Brochure 2007  (pdf, 4991 kB) Product Selection Guide PDF
Power System Management (Spring 2007)  (pdf, 1170 kB) Overview PDF
Does Analog Devices offer any examples application circuits for Hi Speed Comparators? FAQs/RAQs HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

AD96685 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD96685BR Status: Production 16 ld SOIC 16 Comm. Tube, 48 $4.28 $3.86 N  Material Info PCN Purchase
AD96685BR-REEL Status: Production 16 ld SOIC 16 Comm. Reel, 2500 - $3.86 N  Material Info PCN Purchase
AD96685BRZ Status: Production 16 ld SOIC 16 Comm. Tube, 48 $3.43 $3.09 Y  Material Info PCN Purchase
AD96685BRZ-REEL Status: Production 16 ld SOIC 16 Comm. Reel, 2500 - $3.09 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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