ADI AD2S1205WSTZ

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.

• Complete monolithic resolver-to-digital converter (RDC)
• Parallel and serial 12-bit data ports
• System fault detection
• ± 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

• Automotive motion sensing and control
• Hybrid-electric vehicles
• Electric power steering
• Integrated starter generator/alternator
• Industrial motor control
• Process control