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參數(shù)資料
| 型號： | AD2S1205 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 12-Bit R/D Converter with Reference Oscillator |
| 中文描述： | 12位的R / D轉(zhuǎn)換器與參考振蕩器 |
| 文件頁數(shù)： | 1/25頁 |
| 文件大?。?/td> | 367K |
| 代理商： | AD2S1205 |
12-Bit R/D Converter
with Reference Oscillator
Preliminary Technical Data
AD2S1205
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
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
Fax: 781.326.8703
2006 Analog Devices, Inc. All rights reserved.
www.analog.com
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
(DAC)
ADC
ADC
EOUTPUTS
POSITION REGISTER
RESET
DATA I/O
AD2S1205
ENCODER
SYNTHETIC
RVOLTAGE
ICLOCK
GENERATOR
FAULT
DETECTION
TYPE II TRACKING LOOP
VELOCITY REGISTER
MULTIPLEXER
DATA BUS OUTPUT
INPUTS
RESFROM
FAULT
OUTPUTS
ENCODER
EMULATION
CRYSTAL
REFERENCE
Figure 1.
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