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AD568:  12-Bit Ultrahigh Speed Monolithic D/A Converter

Product Details

The AD568 is an ultrahigh-speed, 12-bit digital-to-analog converter (DAC) settling to 0.025% in 35 ns. The monolithic device is fabricated using Analog Devices' Complementary Bipolar (CB) Process. This is a proprietary process featuring high-speed NPN and PNP devices on the same chip without the use of dielectric isolation or multichip hybrid techniques. The high speed of the AD568 is maintained by keeping impedance levels low enough to minimize the effects of parasitic circuit capacitances.

The DAC consists of 16 current sources configured to deliver a 10.24 mA full-scale current. Multiple matched current sources and thin-film ladder techniques are combined to produce bit weighting. The DAC's output is a 10.24 mA full scale (FS) for current output applications or a 1.024 V FS unbuffered voltage output. Additionally, a 10.24 V FS buffered output may be generated using an onboard 1 k(ohm) span resistor with an external op amp. Bipolar ranges are accomplished by pin strapping.

Laser wafer trimming insures full 12-bit linearity. All grades of the AD568 are guaranteed monotonic over their full operating temperature range. Furthermore, the output resistance of the DAC is trimmed to 100(ohm) =/-1.0%. The gain temperature coefficient of the voltage output is 30 ppm/°C max (K).

The AD568 is available in three performance grades. The AD568JQ and KQ are available in 24-pin cerdip (0.3") packages and are specified for operation from 0°C to +70°C. The AD568SQ features operation from -55°C to +125°C and is also packaged in the hermetic 0.3" cerdip.


  • Ultrahigh Speed: Current Settling to 1 LSB in 35 ns
  • High Stability Buried Zener Reference on Chip
  • Monotonicity Guaranteed Over Temperature
  • 10.24 mA Full-Scale Output Suitable for Video Applications
  • Integral and Differential Linearity Guaranteed Over Temperature
  • 0.3" “Skinny DIP” Packaging
  • Variable Threshold Allows TTL and CMOS Interface
  • MIL-STD-883 Compliant Versions Available

Functional Block Diagram for AD568


Title Content Type File Type
AD568: 12-Bit Ultrahigh Speed Monolithic D/A Converter Data Sheet (Rev A, 07/1987) (pdf, 541 kB) Data Sheets PDF
AD568 Military Data Sheet  (Rev B, 03/2002) (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
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
Digital to Analog Converters ICs Solutions Bulletin  (pdf) Solutions Bulletins 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

AD568 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
5962-8980801LA Status: Production 24 ld CerDIP(300 Mil) 24 Mil Tube, 15 $247.94 $210.75 N  Material Info PCN Purchase
AD568JQ Status: Production 24 ld CerDIP(300 Mil) 24 Comm. Tube, 15 $45.44 $38.64 N  Material Info PCN Purchase
AD568KQ Status: Production 24 ld CerDIP(300 Mil) 24 Comm. Tube, 15 $64.73 $55.03 N  Material Info PCN Purchase
AD568SQ Status: Production 24 ld CerDIP(300 Mil) 24 Mil Tube, 15 $163.63 $139.08 N  Material Info PCN Purchase
AD568SQ/883B Status: Production 24 ld CerDIP(300 Mil) 24 Mil Tube, 15 $247.94 $210.75 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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