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AD766:  16-Bit Current-Steering DAC with Voltage Reference

Product Details

The AD766 16-bit DSP DACPORT provides a direct, three-wire interface to the serial ports of popular DSP processors, including the ADSP-2101, TMS320CXX, and DSP56001. No additional "glue logic" is required. The AD766 is also complete, offering on-chip serial-to-parallel input format conversion, a 16-bit current-steering DAC, voltage reference, and a voltage output op amp. The AD766 is fabricated in Analog Devices' BiMOS II mixed-signal process which provides bipolar transistors, MOS transistors, and thin-film resistors for precision analog circuits in addition to CMOS devices for logic.

The design and layout of the AD766 have been optimized for ac performance and are responsible for its guaranteed and tested 94 dB signal-to-noise ratio to 20 kHz and 79 dB SNR to 250 kHz. Laser-trimming the AD766's silicon chromium thin-film resistors reduces total harmonic distortion below -81 dB (at 1 kHz), a specification also production tested. An optional linearity trim pin allows elimination of midscale differential linearity error for even lower THD with small signals.

The AD766's output amplifier provides a ±3 V signal with a high slew rate, small glitch, and fast settling. The output amplifier is short circuit protected and can withstand indefinite shorts to ground.

The serial interface consists of bit clock, data, and latch enable inputs. The twos-complement data word is clocked MSB first on falling clock edges into the serial-to-parallel converter, consistent with the serial protocols of popular DSP processors. The input clock can support data transfers up to 12.5 MHz. The falling edge of latch enable updates the internal DAC input register at the sample rate with the sixteen bits most recently clocked into the serial input register.

The AD766 operates over a ±5 V to ±12 V power supply range. The digital supplies, +VL and -VL, can be separated from the analog signal supplies, +VS and -VS, for reduced digital crosstalk. Separate analog and digital ground pins are also provided. An internal bandgap reference provides a precision voltage source to the output amp that is stable over temperature and time.

Power dissipation is typically 120 mW with ±5 V supplies and 300 mW with ±12 V. The AD766 is available in commercial (0°C to +70°C), industrial (-40°C to +85°C), and military (-55°C to +125°C) grades. Commercial and industrial grade parts are available in a 16-pin plastic DIP; military parts processed to MIL-STD-883B are packaged in a 16-pin ceramic DIP. See Analog Devices' Military Products Databook or current military data sheet for specifications for the military version.


  • Digital Signal Processing
  • Noise Cancellation
  • Radar Jamming
  • Automatic Test Equipment
  • Precision Industrial Equipment
  • Waveform Generation


  • Zero-Chip Interface to Digital Signal Processors
  • Complete DACPORTx
    On-Chip Voltage Reference
    Voltage and Current Outputs
  • Serial, Twos-Complement Input
  • ±3 V Output
  • Sample Rates to 390 kSPS
  • 94 dB Minimum Signal-to-Noise Ratio
  • -81 dB Maximum Total Harmonic Distortion
  • 15-Bit Monotonicity
  • ±5 V to ±12 V Operation
  • 16-Pin Plastic and Ceramic Packages
  • Available in Comercial, Industrial and Military Temperature Ranges

Functional Block Diagram for AD766

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Title Content Type File Type
AD766: 16-Bit Current-Steering DAC, Voltage Reference, Voltage Output Op Amp Data Sheet (Rev A, 03/1991) (pdf, 310 kB) Data Sheets PDF
AN-932: Power Supply Sequencing  (pdf, 95 kB) Application Notes 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

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Price, packaging, availability

AD766 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
5962-9201601MEA Status: Production 16 ld Side-Brazed CerDIP 16 Comm. Tube, 23 $90.74 $82.02 N  Material Info PCN Purchase
AD766AN Status: Production 16 ld PDIP 16 Ind Tube, 25 $23.42 $21.18 N  Material Info PCN Purchase
AD766ANZ Status: Production 16 ld PDIP 16 Ind Tube, 25 $21.33 $19.29 Y  Material Info PCN Purchase
AD766JN Status: Production 16 ld PDIP 16 Comm. Tube, 25 $17.76 $16.05 N  Material Info PCN Purchase
AD766JNZ Status: Production 16 ld PDIP 16 Comm. Tube, 25 $16.17 $14.62 Y  Material Info PCN Purchase
AD766SD/883B Status: Production 16 ld Side-Brazed CerDIP 16 Mil Tube, 23 $90.74 $82.02 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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