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AD2S1205 データシート(PDF) 1 Page - Analog Devices |
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AD2S1205 データシート(HTML) 1 Page - Analog Devices |
1 / 25 page 12-Bit R/D Converter with Reference Oscillator Preliminary Technical Data AD2S1205 Rev. PrB_10/06 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 rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2006 Analog Devices, Inc. All rights reserved. FEATURES Complete monolithic R/D converter Parallel and serial 12-bit data ports System fault detection Absolute position and velocity outputs Differential inputs ±11 arc minutes of accuracy 1,250 rps maximum tracking rate, 12-bit resolution Incremental encoder emulation (1,024 pulses/rev) Programmable sinusoidal oscillator on-board Compatible with DSP and SPI® interface standards 204.8 kHz square wave output Single-supply operation (5.00 V ± 5%) −40°C to +125°C temperature rating 44-lead LQFP package 4 kV ESD protection GENERAL DESCRIPTION The AD2S1205 is a complete 12-bit resolution tracking resolver-to-digital converter, integrating an on-board programmable sinusoidal oscillator that provides sine wave excitation for resolvers. An external crystal is recommended to provide a precision time reference. The converter accepts 3.15 V p-p ± 27% input signals, in the range of 10 kHz to 20 kHz on the Sin and Cos inputs. A Type II servo 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 of the converter is set internally by the input clock frequency. The nominal clock frequency is 8.192MHz which allows a tracking rate of 1,000rps. However by increasing the clock frequency to 10.24MHz a maximum tracking rate of 1,250 rps can be achieved. FUNCTIONAL BLOCK DIAGRAM REFERENCE OSCILLATOR (DAC) ADC ADC EXCITATION OUTPUTS POSITION REGISTER RESET DATA I/O AD2S1205 ENCODER EMULATION SYNTHETIC REFERENCE VOLTAGE REFERENCE INTERNAL CLOCK GENERATOR FAULT DETECTION TYPE II TRACKING LOOP VELOCITY REGISTER MULTIPLEXER DATA BUS OUTPUT INPUTS FROM RESOLVER FAULT DETECTION OUTPUTS ENCODER EMULATION OUTPUTS CRYSTAL REFERENCE PINS Figure 1. |
同様の部品番号 - AD2S1205 |
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同様の説明 - AD2S1205 |
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