Variable Resolution, 10-Bit to 16-Bit R/D Converter with Reference Oscillator Data Sheet AD2S1210-EP FEATURES FUNCTIONAL BLOCK DIAGRAM REFERENCE Complete monolithic resolver-to-digital converter CRYSTAL PINS 3125 rps maximum tracking rate (10-bit resolution) 2.5 arc minutes of accuracy INTERNAL REFERENCE VOLTAGE EXCITATION 10-/12-/14-/16-bit resolution, set by user OSCILLATOR CLOCK REFERENCE OUTPUTS GENERATOR (DAC) Parallel and serial 10-bit to 16-bit data ports Absolute position and velocity outputs SYNTHETIC AD2S1210-EP System fault detection REFERENCE Programmable fault detection thresholds ADC Differential inputs INPUTS FAULT TYPE II FAULT FROM DETECTION TRACKING LOOP Incremental encoder emulation DETECTION RESOLVER OUTPUTS ADC Programmable sinusoidal oscillator on board Compatible with DSP and SPI interface standards POSITION VELOCITY CONFIGURATION 5 V supply with 2.3 V to 5 V logic interface DATA I/O REGISTER REGISTER REGISTER ENHANCED PRODUCT FEATURES ENCODER MULTIPLEXER EMULATION Supports defense and aerospace applications (AQEC standard) OUTPUTS Military temperature range: 55C to +125C DATA BUS OUTPUT Controlled manufacturing baseline 1 assembly/test site DATA I/O 1 fabrication site RESET Product change notification Figure 1. Qualification data available on request PRODUCT HIGHLIGHTS APPLICATIONS 1. Ratiometric tracking conversion. The Type II tracking loop DC and ac servo motor control provides continuous output position data without Encoder emulation conversion delay. It also provides noise immunity and Electric power steering tolerance of harmonic distortion on the reference and Electric vehicles input signals. Integrated starter generators/alternators 2. System fault detection. A fault detection circuit can sense Automotive motion sensing and control loss of resolver signals, out-of-range input signals, input signal mismatch, or loss of position tracking. The fault GENERAL DESCRIPTION detection threshold levels can be individually programmed The AD2S1210-EP is a complete 10-bit to 16-bit resolution by the user for optimization within a particular application. tracking resolver-to-digital converter, integrating an on-board 3. signal range. The sine and cosine inputs can accept programmable sinusoidal oscillator that provides sine wave differential input voltages of 3.15 V p-p 27%. excitation for resolvers. 4. Programmable excitation frequency. Excitation frequency is easily programmable to a number of standard frequencies The converter accepts 3.15 V p-p 27% input signals, in the range between 2 kHz and 20 kHz. of 2 kHz to 20 kHz on the sine and cosine inputs. A Type II 5. Triple format position data. Absolute 10-bit to 16-bit angular servo loop is employed to track the inputs and convert the input position data is accessed via either a 16-bit parallel port or a sine and cosine information into a digital representation of the 4-wire serial interface. Incremental encoder emulation is in input angle and velocity. The maximum tracking rate is 3125 rps. standard A-quad-B format with direction output available. Full details about this enhanced product, including theory of 6. Digital velocity output. 10-bit to 16-bit signed digital operation, registers details, and applications information, are velocity accessed via either a 16-bit parallel port or a 4-wire available in the AD2S1210 data sheet, which should be serial interface. concluded in conjunction with this data sheet. Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20102018 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. ENCODER EMULATION 09154-001AD2S1210-EP Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Timing Specifications ...................................................................5 Enhanced Product Features ............................................................ 1 Absolute Maximum Ratings ............................................................7 Applications ....................................................................................... 1 ESD Caution...................................................................................7 General Description ......................................................................... 1 Pin Configuration and Function Descriptions ..............................8 Functional Block Diagram .............................................................. 1 Typical Performance Characteristics ........................................... 10 Product Highlights ........................................................................... 1 Outline Dimensions ....................................................................... 14 Revision History ............................................................................... 2 Ordering Guide .......................................................................... 14 Specifications ..................................................................................... 3 REVISION HISTORY 5/2018Rev. 0 to Rev. A Changes to Features Section............................................................ 1 Added Enhanced Product Features Section .................................. 1 Updated Outline Dimensions ....................................................... 14 Changes to Ordering Guide .......................................................... 14 6/2010Revision 0: Initial Version Rev. A Page 2 of 16