GENERAL DESCRIPTION
The AD2S1205 is a complete 12-bit resolution tracking resolver-to-digital converter that contains an on-board programmable sinusoidal oscillator providing sine wave excitation for resolvers.
The converter accepts 3.15 V p-p ± 27% input signals on the Sin and Cos inputs. A Type II tracking loop is employed to track the inputs and convert the input Sin and Cos information into a digital representation of the input angle and velocity. The maximum tracking rate is a function of the external clock frequency. The performance of the AD2S105 is specified across a frequency range of 8.192 MHz ± 25%, allowing a maximum tracking rate of 1250 rps.

FEATURES
  Complete monolithic resolver-to-digital converter (RDC)
  Parallel and serial 12-bit data ports
  System fault detection
  ±11 arc minutes of accuracy
  Input signal range: 3.15 V p-p ± 27%
  Absolute position and velocity outputs
  1250 rps maximum tracking rate, 12-bit resolution
  Incremental encoder emulation (1024 pulses/rev)
  Programmable sinusoidal oscillator on board
  Single-supply operation (5.00 V ± 5%)
  −40°C to +125°C temperature rating
  44-lead LQFP
  4 kV ESD protection
  Qualified for automotive applications
 
APPLICATIONS
  Automotive motion sensing and control
  Hybrid-electric vehicles
  Electric power steering
  Integrated starter generator/alternator
  Industrial motor control
  Process control