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AD8802:  12 Channel, 8-Bit TrimDACs with Power Shutdown & Mid-Scale Preset

Product Details


The 12-channel AD8802/AD8804 provides independent digitally-controllable voltage outputs in a compact 20-lead package. This potentiometer divider TrimDAC( allows replacement of the mechanical trimmer function in new designs. The AD8802/ AD8804 is ideal for dc voltage adjustment applications.

Easily programmed by serial interfaced microcontroller ports, the AD8802 with its midscale preset is ideal for potentiometer replacement where adjustments start at a nominal value. Applications such as gain control of video amplifiers, voltage controlled frequencies and bandwidths in video equipment, geometric correction and automatic adjustment in CRT computer graphic displays are a few of the many applications ideally suited for these parts. The AD8804 provides independent control of both the top and bottom end of the potentiometer divider allowing a separate zero-scale voltage setting determined by the VREFL pin. This is helpful for maximizing the resolution of devices with a limited allowable voltage control range.

Internally the AD8802/AD8804 contains 12 voltage-output digital-to-analog converters, sharing a common reference-voltage input.

Each DAC has its own DAC latch that holds its output state. These DAC latches are updated from an internal serial-to-parallel shift register that is loaded from a standard 3-wire serial input digital interface. The serial-data-input word is decoded where the first 4 bits determine the address of the DAC latches to be loaded with the last 8 bits of data. The AD8802/ AD8804 consumes only 10 µA from 5 V power supplies. In addition, in shutdown mode reference input current consumption is also reduced to 10 µA while saving the DAC latch settings for use after return to normal operation.

The AD8802/AD8804 is available in the 20-pin plastic DIP, the SOIC-20 surface mount package, and the 1 mm thin TSSOP-20 package.

FEATURES and BENEFITS

  • Low Cost
  • Replaces 12 Potentiometers
  • Individually Programmable Outputs
  • 3-Wire SPI Compatible Serial Input
  • Power Shutdown < 55 µWatts
    Including IDD & IREF
  • Midscale Preset, AD8802
  • Separate VREF Range Settling, AD8804
  • +3 to +5 Single Supply Operation

Functional Block Diagram for AD8802

Documentation

Title Content Type File Type
AD8802/AD8804: 12 Channel, 8-Bit TrimDACs with Power Shutdown Data Sheet (Rev 0, 09/2002) (pdf, 432 kB) Data Sheets PDF
AN-219: Electronic Adjustment Made Easy with the TrimDAC®  (pdf, 404 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

AD8802 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8802AR Status: Last Time Buy 20 ld SOIC - Wide 20 Ind Tube, 37 $5.13 $4.64 N  Material Info PCN/PDN Purchase
AD8802ARU Status: Production 20 ld TSSOP 20 Ind Tube, 75 $5.13 $4.64 N  Material Info PCN Purchase
AD8802ARU-REEL Status: Production 20 ld TSSOP 20 Ind Reel, 2500 - $4.64 N  Material Info PCN Purchase
AD8802ARUZ Status: Production 20 ld TSSOP 20 Ind Tube, 75 $4.44 $4.02 Y  Material Info PCN Purchase Sample
AD8802ARUZ-REEL Status: Production 20 ld TSSOP 20 Ind Reel, 2500 - $4.02 Y  Material Info PCN Purchase
AD8802ARZ Status: Production 20 ld SOIC - Wide 20 Ind Tube, 37 $4.44 $4.02 Y  Material Info PCN Purchase Sample
AD8802ARZ-REEL Status: Production 20 ld SOIC - Wide 20 Reel, 1000 - $4.02 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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