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AD781:  High Speed, Monolithic SHA with a Max Acquisition Time for 700 ns to 0.01% Over Temperature

Product Details

The AD781 is a high speed monolithic sample-and-hold amplifier (SHA). The AD781 guarantees a maximum acquisition time for 700 ns to 0.01% over temperature. The AD781 is specified and tested for hold mode total harmonic distortion and hold mode signal-to-noise and distortion. The AD781 is configured as a unity gain amplifier and uses a self-correcting architecture that minimizes hold mode errors and insures accuracy over temperature. The AD781 is self-contained and requires no external components or adjustments.

The low power dissipation, 8-pin mini-DIP package and completeness make the AD781 ideal for highly compact board layouts. The AD781 will acquire a full-scale input in less than 700 ns and retain the held value with a droop rate of 0.01 µV/µs. Excellent linearity and hold mode dc and dynamic performance make the AD781 ideal for 12- and 14-bit high speed analog-to-digital converters.

The AD781 is manufactured on Analog Devices' BiMOS process which merges high performance, low noise bipolar circuitry with low power CMOS to provide an accurate, high speed, low power SHA.

The AD781 is specified for three temperature ranges. The J grade device is specified or operation form 0°C to 70°C , the A grade form -40°C to +85°C and the S grade from -55°C to +125°C . The J and A grades are available in 8-pin plastic DIP packages. The S grade is available in an 8-pin cerdip package.


  • Acquisition Timeto 0.01%:
    700 ns Maximum
  • Low Power Dissipation: 95 mW
  • Low Droop Rate: 0.01 µV/µs
  • Fully Specified and Tested Hold Mode Distortion
  • Total Harmonic Distortion:
    -80 dB Maximum
  • Aperture Jitter: 75 ps Maximum
  • Internal Hold Capacitor
  • Self-Correcting Architecture
  • 8-Pin Mini Cerdip and Plastic Package
  • MIL-STD-883 Compliant Versions Available

Functional Block Diagram for AD781


Title Content Type File Type
AD781: Complete 700 ns Sample-and-Hold Amplifier Data Sheet (Rev A, 02/1991) (pdf, 153 kB) Data Sheets 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

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

AD781 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD781ANZ Status: Production 8 ld PDIP 8 Comm. Tube, 50 $11.31 $10.22 Y  Material Info PCN Purchase
AD781JN Status: Production 8 ld PDIP 8 Comm. Tube, 50 $9.60 $8.68 N  Material Info PCN Purchase
AD781JNZ Status: Production 8 ld PDIP 8 Comm. Tube, 50 $8.75 $7.92 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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