AD2S80A

The AD2S80A is a monolithic 10-, 12-, 14- or 16-bit tracking resolver-to-digital converter contained in a 40-pin DIP or 44-pin LCC ceramic package. It is manufactured on a BiMOS II process that combines the advantages of CMOS logic and bipo-lar high accuracy linear circuits on the same chip.

The converter allows users to select their own resolution and dy-namic performance with external components. This allows the users great flexibility in defining the converter that best suits their sys-tem requirements. The converter allows users to select the reso-lution to he 10, 12, 14 or 16 bits and to track resolver signals rotating at up to 1040 revs per second (62,400 rpm) when set to 10-bit resolution.

The AD2S80A converts resolver format input signals into a par-allel natural binary digital word using a ratiometric tracking con-version method. This ensures high-noise immunity and toleranceof lead length when the converter is remote from the resolver.

The 10-, 12-, 14- or 16-bit output word is in a three-state digi-tal logic available in 2 bytes on the 16 output data lines. BYTE SELECT, ENABLE and INHIBIT pins ensure easy data trans-fer to 8- and 16-bit data buses, and outputs are provided to allow for cycle or pitch counting in external counters.An analog signal proportional to velocity is also available and can be used to replace a tachogenerator.

The AD2S80A operates over 50 Hz to 20,000 Hz reference frequency.