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AD2S1205:  12-Bit R/D Converter with Reference Oscillator

Product Details


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.

Product Highlights

  1. Ratiometric Tracking Conversion. The Type II tracking loop provides continuous output position data without conversion delay. It also provides noise immunity and tolerance of harmonic distortion on the reference and input signals.
  2. System Fault Detection. A fault detection circuit can sense loss of resolver signals, out-of-range input signals, input signal mismatch, or loss of position tracking.
  3. Input Signal Range. The Sin and Cos inputs can accept differential input voltages of 3.15 V p-p ± 27%.
  4. Programmable Excitation Frequency. Excitation frequency is easily programmable to 10 kHz, 12 kHz, 15 kHz, or 20 kHz by using the frequency select pins (the FS1 and FS2 pins).
  5. Triple Format Position Data. Absolute 12-bit angular position data is accessed via either a 12-bit parallel port or a 3-wire serial interface. Incremental encoder emulation is in standard A-quad-B format with direction output available.
  6. Digital Velocity Output. 12-bit signed digital velocity accessed via either a 12-bit parallel port or a 3-wire serial interface.

Applications

  • Automotive motion sensing and control
  • Hybrid-electric vehicles
  • Electric power steering
  • Integrated starter generator/alternator
  • Industrial motor control
  • Process control
  • Data Sheet, Rev. 0, 1/07

    FEATURES and BENEFITS

    • 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

    Functional Block Diagram for AD2S1205

    Documentation

    Title Content Type File Type
    AD2S1205: 12-Bit RDC with Reference Oscillator Data Sheet (Rev A, 05/2010) (pdf, 467 kB) Data Sheets PDF
    UG-365: Evaluation Board for the AD2S1200/AD2S1205 Resolver-to-Digital Converters  (pdf, 1021 kB) User Guides PDF
    Precision Resolver-to-Digital Converter Measures Angular Position and Velocity
    By Jakub Szymczak, Shane O’Meara, Johnny S. Gealon, and Christopher Nelson De La Rama.
    Analog Dialogue, Volume 48 – March 2014
    Technical Articles HTML
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Evaluation Kits & Symbols & Footprints

    Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

    SampleSample & Buy

    Price, packaging, availability

    AD2S1205 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD2S1205WSTZ Status: Production 44 ld LQFP (10x10mm) 44 Ind Tray, 160 $11.34 $9.71 Y  Material Info PCN Purchase Sample
    AD2S1205YSTZ Status: Production 44 ld LQFP (10x10mm) 44 Ind Tray, 160 $14.17 $12.14 Y  Material Info PCN Purchase Sample
    ADW71205WSTZ Status: Production 44 ld LQFP (10x10mm) 44 Auto Tray, 160 $14.74 $12.63 Y  Material Info PCN Purchase
    ADW71205WSTZ-RL Status: Production 44 ld LQFP (10x10mm) 44 Auto Reel, 1500 - $12.63 Y  Material Info PCN Purchase
    ADW71205YSTZ Status: Production 44 ld LQFP (10x10mm) 44 Ind Tray, 160 $18.42 $15.78 Y  Material Info PCN Purchase
    Price Table Help

    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

    AD2S1205 Evaluation kit
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    EVAL-AD2S1205SDZ Status: Production Evaluation Board $99.00 Yes -
    EVAL-SDP-CB1Z Status: Production Evaluation Controller Board $99.00 Yes -

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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