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AD7111:  Monolithic Multiplying DAC Featuring Wide Dynamic Range

Product Details


The LOGDAC™ AD7111/AD7111A are monolithic multiplying D/A converters featuring wide dynamic range in a small package. Both DACs can attenuate an analog input signal over the range 0 dB to 88.5 dB in 0.375 dB steps. They are available in 16-pin DIPs and SOIC packages. The AD7111 is also available in a 20-terminal LCCC package.

The degree of attenuation across the DAC is determined by an 8-bit word applied to the on-board decode logic. This 8-bit word is decoded into a 17-bit word which is then applied to a 17-bit R-2R ladder. The very fine step resolution, which is available over the entire dynamic range, is due to the use of this 17-bit DAC.

The AD7111/AD7111A are easily interfaced to a standard 8-bit MPU bus via an 8-bit data port and standard microprocessor control lines. The AD7111 WR input is edge triggered and requires a rising edge to load new data to the DAC. The AD7111A WR is level triggered to allow transparent operation of the latches, if required. It should also be noted that the AD7111A is exactly pin and function-compatible with the AD7524, an industry standard 8-bit multiplying DAC. This allows an easy upgrading of existing AD7524 designs which would benefit both from the wider dynamic range and the finer step resolution offered by the AD7111A.

The AD7111/AD7111A are fabricated in Linear Compatible CMOS (LC2MOS), an advanced, mixed technology process that combines precision bipolar circuits with lower CMOS logic.

LOGDAC is a registered trademark of Analog Devices, Inc.

FEATURES and BENEFITS

  • Dynamic Range: 88.5 dB
  • Resolution: 0.375 dB
  • On-Chip Data Latches
  • +5 V Operation
  • AD7111A Pin Compatible with AD7524
  • Low Power

Functional Block Diagram for AD7111

AD7111 Diagram
Functional Block Diagram for AD7111

Documentation

Title Content Type File Type
AD7111/AD7111A: Monolithic Multiplying D/A Converters Featuring Wide Dynamic Range Data Sheet (Rev 0, 09/2002) (pdf, 175 kB) Data Sheets PDF
AN-364: Enhancing the Performance of the AD7111A and AD7112 LOGDACs  (pdf, 194 kB) Application Notes PDF
AN-208: 08: Understanding LOGDACs  (pdf, 156 kB)
LOGDACs are CMOS Multiplying DACs With an Expontial (Anti-Logarithmic) Digital-to-Analog Transfer Characteristic (Rather Than a Linear D/A Transfer Characteristic)
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.

SampleSample & Buy

Price, packaging, availability

AD7111 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7111ABR Status: Production 16 ld SOIC - Wide 16 Ind Tube, 47 $9.27 $9.27 N  Material Info PCN/PDN Purchase
AD7111ABRZ Status: Production 16 ld SOIC - Wide 16 Ind Tube, 47 $8.45 $8.45 Y  Material Info PCN/PDN Purchase
AD7111ABRZ-REEL Status: Contact ADI 16 ld SOIC - Wide 16 Ind Reel, 1000 - $8.05 Y  Material Info PCN/PDN Purchase
AD7111ACR Status: Production 16 ld SOIC - Wide 16 Ind Tube, 47 $12.64 $12.64 N  Material Info PCN/PDN Purchase
AD7111ACR-REEL Status: Contact ADI 16 ld SOIC - Wide 16 Ind Reel, 1000 - $11.52 N  Material Info PCN/PDN Purchase
AD7111ACRZ Status: Production 16 ld SOIC - Wide 16 Ind Tube, 47 $10.97 $10.97 Y  Material Info PCN/PDN Purchase
AD7111ACRZ-REEL Status: Production 16 ld SOIC - Wide 16 Ind Reel, 1000 - $10.97 Y  Material Info PCN/PDN Purchase
AD7111BQ Status: Last Time Buy 16 ld CerDIP 16 Ind Tube, 25 $40.15 $40.15 N  Material Info PCN/PDN Purchase
AD7111KNZ Status: Last Time Buy 16 ld PDIP 16 Comm. Tube, 25 $27.45 $24.81 Y  Material Info PCN/PDN Purchase
AD7111LNZ Status: Last Time Buy 16 ld PDIP 16 Comm. Tube, 25 $36.04 $32.58 Y  Material Info PCN/PDN Purchase
AD7111UQ Status: Contact ADI 16 ld CerDIP 16 Mil Tube, 25 - - N  Material Info PDN Contact ADI
AD7111UQ/883B Status: Last Time Buy 16 ld CerDIP 16 Mil Tube, 25 $173.02 $156.42 N  Material Info PCN/PDN 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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