AD2S1205 RDC IC Chip

AD2S1205 (12- Bit RDC with Reference Oscillator)

Introduction

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.

Feature

• 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: 3.15V p-p ±27%
• Absolute position and velocity outputs
• 1250 rps maximum tracking rate, 1 2-bit resolution
• Incremental encoder emulation (1024 pulses/rev)
• Programmable sinusoidal oscillator on board
• Single-supply operation (5.00V ±5%)
• -40°C to +125°C temperature rating
• 44-lead LQFP
• 4 kV ESD protection
• Qualified for automotive applications

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