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AD585:  Complete Monolithic SHA Circuit

Product Details

The AD585 is a complete monolithic sample-and-hold circuit consisting of a high performance operational amplifier in series with an ultralow leakage analog switch and a FET input integrating amplifier. An internal holding capacitor and matched applications resistors have been provided for high precision and applications flexibility.

The performance of the AD585 makes it ideal for high speed 10- and 12-bit data acquisition systems, where fast acquisition time, low sample-to-hold offset, and low droop are critical. The AD585 can acquire a signal to ±0.01% in 3 µs maximum, and then hold that signal with a maximum sample-to-hold offset of 3 mV and less than 1 mV/ms droop, using the on-chip hold capacitor. If lower droop is required, it is possible to add a larger external hold capacitor.

The high speed analog switch used in the AD585 exhibits aperture jitter of 0.5 ns, enabling the device to sample full scale (20 V peak-to-peak) signals at frequencies up to 78 kHz with 12-bit precision.

The AD585 can be used with any user-defined feedback net-work to provide any desired gain in the sample mode. On-chip precision thin-film resistors can be used to provide gains of +1, -1, or +2. Output impedance in the hold mode is sufficiently low to maintain an accurate output signal even when driving the dynamic load presented by a successive-approximation A/D converter. However, the output is protected against damage from accidental short circuits.

The control signal for the HOLD command can be either active high or active low. The differential HOLD signal is compatible with all logic families, if a suitable reference level is provided. An on-chip TTL reference level is provided for TTL compatibility.

The AD585 is available in three performance grades. The JP grade is specified for the 0°C to +70°C commercial temperature range and packaged in a 20-pin PLCC. The AQ grade is specified for the -25°C to +85°C industrial temperature range and is packaged in a 14-pin cerdip. The SQ and SE grades are specified for the -55°C to +125°C military temperature range and are packaged in a 14-pin cerdip and 20-pin LCC.


  • 3.0 ms Acquisition Time to 60.01% max
  • Low Droop Rate: 1.0 mV/ms max
  • Sample/Hold Offset Step: 3 mV max
  • Aperture Jitter: 0.5 ns
  • Extended Temperature Range:
    –55°C to +125°C
  • Internal Hold Capacitor
  • Internal Application Resistors
  • See datasheet for additional features

Pin Configuration Diagram for AD585


Title Content Type File Type
AD585: Complete Monolithic SHA Circuit Data Sheet  (Rev A, 04/2002) (pdf, 339 kB) Data Sheets PDF
AD585: Military Data Sheet  (Rev C, 08/2002) (pdf) Data Sheets 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
PCN#00-406  (pdf, 14 kB)
Product Change notice for change of Analog Devices, Inc. Aerospace Product Line standard product from 883 Class S to MIL-PRF-38535, level V.
Aerospace Information PDF
Aerospace Dice  (pdf, 196 kB)
(Revised 1/2006)
Many Analog Devices products can be purchased as Class K die.
Aerospace Information 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
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

AD585 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
5962-87540012A Status: Production LCC:CER LEADLESS CHIP CARR 20 Mil Tube, 54 $79.75 $72.08 N  Material Info PCN Purchase
5962-8754001CA Status: Production 14 ld CerDIP 14 Mil Tube, 25 $84.32 $76.21 N  Material Info PCN Purchase
AD585ACHIPS Status: Production CHIPS OR DIE 0 Ind Tray, 100 $10.30 $10.30 Y  Material Info Notify Me Purchase
AD585AQ Status: Production 14 ld CerDIP 14 Ind Tube, 25 $22.43 $20.30 N  Material Info PCN Purchase
AD585JP Status: Production 20 ld PLCC 20 Comm. Tube, 49 $20.53 $18.55 N  Material Info PCN Purchase
AD585JP-REEL Status: Production 20 ld PLCC 20 Comm. Reel, 1000 - $18.55 N  Material Info PCN Purchase
AD585JP-REEL7 Status: Contact ADI 20 ld PLCC 20 Comm. Reel, 250 - - N  Material Info PCN Contact ADI
AD585JPZ Status: Production 20 ld PLCC 20 Comm. Tube, 49 $18.70 $16.91 Y  Material Info PCN Purchase
AD585JPZ-REEL7 Status: Production 20 ld PLCC 20 Comm. Reel, 250 - $16.91 Y  Material Info PCN Purchase
AD585SCHIPS Status: Production CHIPS OR DIE 0 Mil Tray, 100 $36.77 $36.77 Y  Material Info Notify Me Purchase
AD585SE Status: Production LCC:CER LEADLESS CHIP CARR 20 Mil Tube, 54 $59.81 $54.04 Y  Material Info PCN Purchase
AD585SE/883B Status: Production LCC:CER LEADLESS CHIP CARR 20 Mil Tube, 54 $80.68 $72.92 N  Material Info PCN Purchase
AD585SQ Status: Production 14 ld CerDIP 14 Mil Tube, 25 $62.04 $56.10 N  Material Info PCN Purchase
AD585SQ/883B Status: Production 14 ld CerDIP 14 Mil Tube, 25 $80.65 $72.91 N  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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