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AD768:  16-Bit, 30 MSPS D/A Converter

Product Details


The AD768 is a 16-bit, high speed digital-to-analog converter (DAC) that offers exceptional ac and dc performance. The AD768 is manufactured on ADI's Advanced Bipolar CMOS (ABCMOS) process, combining the speed of bipolar transistors, the accuracy of laser-trimmable thin film resistors, and the efficiency of CMOS logic. A segmented current source architecture is combined with proprietary switching technique to reduce glitch energy and maximize dynamic accuracy. Edge triggered input latches and a temperature compensated bandgap reference have been integrated to provide a complete monolithic DAC solution.

The AD768 is a current-output DAC with a nominal full-scale output current of 20mA and a 1k(ohm) output impedance. Differential current outputs are provided to support single-ended or differential applications. The current outputs may be tied directly to an output, or fed to the summing junction of a high speed amplifier to provide a buffered voltage output. Also, the differential outputs may be interfaced to a transformer or differential amplifier.

The on-chip reference and control amplifier are configured for maximum accuracy and flexibility. The AD768 can be driven by the on-chip reference or by a variety of external reference voltages based on the selection of an external resistor. An external capacitor allows the user to optimally trade off reference bandwidth and noise performance.

The AD768 operates on ±5V supplies, typically consuming 465 mW of power. The AD768 is available in a 28-pin SOIC package and is specified for operation over the industrial temperature range.

FEATURES and BENEFITS

  • 30 MSPS Update Rate
  • 16-Bit Resolution
  • Linearity: 1/2 LSB DNL @14 Bits
    1 LSB INL @14 Bits
  • Fast Settling: 25 ns Full-Scale Settling to 0.025%
  • SFDR @ 1 MHz Output: 86 dBc
  • THD @ 1 MHz Output: 71 dBc
  • Low Glitch Impulse: 35 pV-s
  • Power Dissipation: 465 mW
  • On-Chip 2.5 V Reference
  • Edge-Triggered Latches
  • Multiplying Reference Capability

Functional Block Diagram for AD768

Documentation

Title Content Type File Type
AD768: 16-Bit, 30 MSPS D/A Converter Data Sheet  (Rev B, 06/1996) (pdf, 334 kB) Data Sheets PDF
AN-932: Power Supply Sequencing  (pdf, 95 kB) Application Notes PDF
AN-912: Driving a Center-Tapped Transformer with a Balanced Current-Output DAC  (pdf, 246 kB) Application Notes PDF
AN-414: Low Cost, Low Power Devices for HDSL Applications  (pdf, 41 kB) Application Notes PDF
Ask The Applications Engineer-17
Must a “16-bit” converter be 16-bit monotonic and settle to 16 ppm?

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Aerospace Dice  (pdf, 196 kB)
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Digital to Analog Converters ICs Solutions Bulletin  (pdf) Solutions Bulletins PDF
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Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

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

AD768 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD768AR Status: Production 28 ld SOIC - Wide 28 Ind Tube, 27 $32.98 $26.38 N  Material Info PCN Purchase
AD768ARZ Status: Production 28 ld SOIC - Wide 28 Ind Tube, 27 $30.04 $24.02 Y  Material Info PCN Purchase
AD768ARZ-REEL Status: Production 28 ld SOIC - Wide 28 Ind Reel, 1000 - $24.02 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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