器件名称:
AD2S1205
功能描述:
12-Bit R/D Converter with Reference Oscillator
文件大小:
357.41KB 共25页
简 介:
Preliminary Technical Data 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 12-Bit R/D Converter with Reference Oscillator AD2S1205 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 PINS CRYST……
