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SDC1742:  12-Bit Synchro-to-Digital Converter

Product Details

The SDC1742 is a hybrid 12-bit continuous tracking synchro digital converter. In the core of this hybrid, the conversion process is performed by a monolithic IC manufactured in Analog Devices proprietary BiMOS II process that combines the advantages of CMOS logic and bipolar high accuracy linear circuits on the same chip. Internal isolating micro-transformers are used to provide true isolation of the signal and reference inputs. The 12-bit digital word is in a three-state digital form available in two bytes. Using separate ENABLE inputs for the most significant 8 bits and the least significant 6 or 4 bits not only simplifies multiplexing off more than one device onto a single data bus, but also enables the INHIBIT input to be used without interrupting the operation of tracking loop. The converters are hermetically sealed in a 32-pin welded metal package.


  • Internal Isolation Transformers
  • Military Temperature Range
  • Three Accuracy Options
  • 14-Bit or 12-Bit Resolution
  • High, Continuous Tracking Rate
  • 32-Pin Welded Metal Package
  • Hermetically Sealed
  • Ratiometric Conversion
  • Laser Trimmed - No External Adjustment
  • Three-State Latched Outputs

Functional Block Diagram for SDC1742


Title Content Type File Type
SDC/RDC1740/1741/1742: 12/14-Bit Hybrid Synchro/Resolver-to-Digital Converters Scanned Data Sheet  (Rev A, 10/2006) (pdf, 3583 kB) Data Sheets PDF
ADI Warns Against Misuse of COTS Integrated Circuits  (pdf, 13 kB)
(Revised 1/03)
Invites Customer Participation in Creative Mil/Aero System Solutions
Recommended Reading PDF
GIDEP - Product Change Notice  (pdf, 72 kB)
ADI Philippines is being qualified as alternative sites for QMLV, Class S, JAN S and customer SCD Drawings for screening, testing, and quality conformance testing presently tested at ADI Santa Clara, CA. The device types effected by this move are listed in the Appendices.
Aerospace Information PDF
Space Products Signal Chain  (pdf, 176 kB)
(Revised 12/01)
Satellite signal chain with suggested part types in various locations.
Aerospace Information PDF
Technology Overview Overview HTML
Multi-Chip Products Capability Brochure  (pdf, 112 kB) Overview 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

SDC1742 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
SDC1742-411B Status: Production METAL RECT. HERMETIC DIP 32 Ind 1 $1,644.29 - N  Material Info Notify Me Purchase
SDC1742-412B Status: Production METAL RECT. HERMETIC DIP 32 Ind 1 $1,566.86 - N  Material Info Notify Me 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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