AD2S90

a FEATURES Complete Monolithic Resolver-to-Digital Converter Incremental Encoder Emulation (1024-Line) Absolute Serial Data (12-Bit) Differential Inputs 12-Bit Resolution Industrial Temperature Range 20-Lead PLCC Low Power (50 mW) APPLICATIONS Industrial Motor Control Servo Motor Control Industrial Gauging Encoder Emulation Automotive Motion Sensing and Control Factory Automation Limit Switching Low Cost, Complete 12-Bit Resolver-to-Digital Converter SIN SIN LO COS COS LO NMC A B NM CS SCLK DATA AD2S90 FUNCTIONAL BLOCK DIAGRAM REF HIGH ACCURACY ANGLE SIN COS ␪ MULTIPLIER DECODE LOGIC DIGITAL ANGLE ␾ UP-DOWN COUNTER SIN (␪ – ␾) P.S.D. AND FREQUENCY SHAPING ERROR AMPLIFIER VEL U/D CLK CLKOUT HIGH DYNAMIC RANGE V.C.O. DIR LATCH SERIAL INTERFACE GENERAL DESCRIPTION The AD2S90 is a complete 12-bit resolution tracking resolverto-digital converter. No external components are required to operate the device. The converter accepts 2 V rms ± 10% input signals in the r...