The SDC1741 is a hybrid 12-bit continuous tracking synchro digitalconverter. In the core of this hybrid, the conversion process is performedby a monolithic IC manufactured in Analog Devices proprietary BiMOS IIprocess 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. 

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.