SDC1742

Obsolete

12-Bit Synchro-to-Digital Converter

Data Sheet (Rev. A) Product Selection Table

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Overview

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

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.