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AD2S1210WDSTZ Datasheet(PDF) 1 Page - Analog Devices |
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AD2S1210WDSTZ Datasheet(HTML) 1 Page - Analog Devices |
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1 / 37 page  Variable Resolution, 10-Bit to 16-Bit R/D Converter with Reference Oscillator AD2S1210 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2008–2010 Analog Devices, Inc. All rights reserved. FEATURES Complete monolithic resolver-to-digital converter 3125 rps maximum tracking rate (10-bit resolution) ±2.5 arc minutes of accuracy 10-/12-/14-/16-bit resolution, set by user Parallel and serial 10-bit to 16-bit data ports Absolute position and velocity outputs System fault detection Programmable fault detection thresholds Differential inputs Incremental encoder emulation Programmable sinusoidal oscillator on-board Compatible with DSP and SPI interface standards 5 V supply with 2.3 V to 5 V logic interface −40°C to +125°C temperature rating APPLICATIONS DC and ac servo motor control Encoder emulation Electric power steering Electric vehicles Integrated starter generators/alternators Automotive motion sensing and control FUNCTIONAL BLOCK DIAGRAM REFERENCE OSCILLATOR (DAC) EXCITATION OUTPUTS AD2S1210 SYNTHETIC REFERENCE RESET DATA I/O INPUTS FROM RESOLVER ENCODER EMULATION OUTPUTS VOLTAGE REFERENCE REFERENCE PINS INTERNAL CLOCK GENERATOR CRYSTAL TYPE II TRACKING LOOP FAULT DETECTION FAULT DETECTION OUTPUTS POSITION REGISTER ADC ADC CONFIGURATION REGISTER MULTIPLEXER DATA BUS OUTPUT DATA I/O VELOCITY REGISTER Figure 1. GENERAL DESCRIPTION The AD2S1210 is a complete 10-bit to 16-bit resolution tracking resolver-to-digital converter, integrating an on-board program- mable sinusoidal oscillator that provides sine wave excitation for resolvers. The converter accepts 3.15 V p-p ± 27% input signals, in the range of 2 kHz to 20 kHz on the sine and cosine inputs. A Type II servo loop is employed to track the inputs and convert the input sine and cosine information into a digital representation of the input angle and velocity. The maximum tracking rate is 3125 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. The fault detection threshold levels can be individually programmed by the user for optimization within a particular application. 3. Input signal range. The sine and cosine inputs can accept differential input voltages of 3.15 V p-p ± 27%. 4. Programmable excitation frequency. Excitation frequency is easily programmable to a number of standard frequencies between 2 kHz and 20 kHz. 5. Triple format position data. Absolute 10-bit to 16-bit angular position data is accessed via either a 16-bit parallel port or a 4-wire serial interface. Incremental encoder emulation is in standard A-quad-B format with direction output available. 6. Digital velocity output. 10-bit to 16-bit signed digital velocity accessed via either a 16-bit parallel port or a 4-wire serial interface. |
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