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AD7249:  LC2MOS Dual 12-Bit Serial DACPORT

Product Details


Newer Alternatives:
  • AD5722R Complete, Dual, 12-Bit, Unipolar/Bipolar, Voltage Output DAC with Internal Reference

The AD7249 DACPORT® contains a pair of 12-bit, voltage-ouput, digital-to-analog converters with output amplifiers and Zener voltage reference on a monolithic CMOS chip. No external trims are required to achieve full specified performance.

The output amplifiers are capable of developing +10 V across a 2 k(Ohm) load. The output voltage ranges with single supply operation are 0 V to +5 V or 0 V to +10 V, while an additional bipolar ±5V output range is available with dual supplies. The ranges are selected using the internal gain resistor.

Interfacing to the AD7249 is serial, minimizing pin count and allowing a small package size. Standard control signals allow interfacing to most DSP processors and microcontrollers. The data stream consists of 16 bits, DB15 to DB13 are don't care bits, the 13th bit (DB12) is used as the channel select bit and the remaining 12 bits (DB11 to DB0) contain the data to update the DAC. The 16-bit data word is clocked into the input register on each falling SCLK edge.

The data format is natural binary in both unipolar ranges, while either offset binary or twos complement format may be selected in the bipolar range. A CLR function is provided which sets the ouput to 0 V in both unipolar ranges and in the twos complement bipolar range, while with offset binary data format, the ouput is set to -REFIN. This function is useful as a power-on reset as it allows the outputs to be set to a known voltage level.

The AD7249 features a serial interface which allows easy connection to both microcomputers and 16-bit digital signal processors with serial ports. The serial data may be applied at rates up to 2 MHz allowing a DAC update rate of 125 kHz.

The AD7249 is fabricated on linear compatible CMOS (LC2MOS), an advanced, mixed technology process. It is packaged in 16-pin DIP and 16-pin SOIC packages.

DACPORT is a registered trademark of Analog Devices, Inc.

FEATURES and BENEFITS

  • Two 12-Bit CMOS DAC Channels with
    On-Chip Voltage Reference
    Output Amplifiers
  • Three Selectable Output Ranges per Channel
    -5 V to + 5 V, 0 V to +5 V, 0 V to +10 V
  • Serial Interface
  • 125 kHz DAC Update Rate
  • Small Size: 16-Lead DIP or SOIC
  • Low Power Dissipation

Functional Block Diagram for AD7249

AD7249 Diagram
Functional Block Diagram for AD7249

Similar Products

See also similar products:
The AD5722R is a Complete, Dual, 12-Bit, Serial Input, Unipolar/Bipolar, Voltage Output DAC in 24-lead TSSOP-EP
The AD5732R is a CompleteComplete, Dual, 14-Bit, Serial Input, Unipolar/Bipolar, Voltage Output DAC in 24-lead TSSOP-EP
The AD5752R is a Complete, Dual, 16-Bit, Serial Input, Unipolar/Bipolar, Voltage Output DAC in 24-lead TSSOP-EP

Documentation

Title Content Type File Type
AD7249: LC2MOS Dual 12-Bit Serial DACPORT® Data Sheet (Rev D, 10/2013) (pdf, 149 kB) Data Sheets PDF
AN-348: Avoiding Passive-Component Pitfalls  (pdf, 931 kB)
The Wrong Passive Component Can Derail Even the Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.
Application Notes PDF
AN-214: Ground Rules for High Speed Circuits  (pdf, 356 kB)
Layout and Wiring Are Critical in Video Converter Circuits.
Application Notes PDF
AN-225: 12-Bit Voltage-Output DACs for Single-Supply 5V and 12V Systems  (pdf, 237 kB) Application Notes 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

AD7249 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7249AN Status: Last Time Buy 16 ld PDIP 16 Comm. Tube, 25 $13.66 $11.58 N  Material Info PCN/PDN Purchase
AD7249ANZ Status: Production 16 ld PDIP 16 Comm. Tube, 25 $12.45 $10.56 Y  Material Info PCN Purchase
AD7249AR Status: Production 16 ld SOIC - Wide 16 Ind Tube, 47 $13.26 $11.25 N  Material Info PCN Purchase
AD7249AR-REEL Status: Production 16 ld SOIC - Wide 16 Ind Reel, 1000 - $11.25 N  Material Info PCN Purchase
AD7249ARZ Status: Production 16 ld SOIC - Wide 16 Comm. Tube, 47 $12.08 $10.24 Y  Material Info PCN Purchase
AD7249ARZ-REEL Status: Production 16 ld SOIC - Wide 16 Comm. Reel, 1000 - $10.24 Y  Material Info PCN Purchase
AD7249BNZ Status: Production 16 ld PDIP 16 Ind Tube, 25 $15.54 $13.20 Y  Material Info PCN Purchase
AD7249BR Status: Production 16 ld SOIC - Wide 16 Ind Tube, 47 $16.57 $14.06 N  Material Info PCN Purchase
AD7249BR-REEL Status: Production 16 ld SOIC - Wide 16 Ind Reel, 1000 - $14.06 N  Material Info PCN Purchase
AD7249BRZ Status: Production 16 ld SOIC - Wide 16 Ind Tube, 47 $15.09 $12.80 Y  Material Info PCN Purchase
AD7249BRZ-REEL Status: Production 16 ld SOIC - Wide 16 Ind Reel, 1000 - $12.80 Y  Material Info PCN Purchase
AD7249SQ Status: Production 16 ld CerDIP 16 Mil Tube, 25 $47.93 $40.99 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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