AD6649
目录
特点................................................. ............................................. 1
应用................................................. ...................................... 1
概述................................................ ......................... 1
功能框图............................................... ............... 1
修订历史................................................ ............................... 2
产品亮点................................................ ........................... 3
规格................................................. .................................... 4
ADC直流规范............................................... .................. 4
ADC交流规范............................................... .................. 5
数规格................................................ ..................... 6
开关规格................................................ ................ 8
时序规格................................................ .................. 9
绝对最大额定值............................................... ........... 10
热特性................................................ ............ 10
ESD注意事项................................................ ................................ 10
引脚配置和功能描述........................... 11
典型性能特征........................................... 13
等效电路................................................ ......................... 16
工作原理............................................... ....................... 17
ADC体系结构................................................ ...................... 17
模拟输入注意事项............................................... ..... 17
电压基准................................................ ....................... 19
时钟输入注意事项............................................... ....... 19
功耗和待机模式..................................... 20
数字输出................................................ ........................... 21
数字处理................................................ ........................... 22
数控振荡器（ NCO ） ............................. 22
NCO和FIR滤波器模式............................................. .......... 22
f
S
/ 4固定频率NCO ............................................ ........... 22
数控振荡器（ NCO ） ................................. 23
频率转换................................................ ............... 23
NCO同步................................................ ............... 23
NCO幅度和相位抖动.......................................... 23
FIR滤波器................................................ ........................................ 24
FIR同步................................................ .................. 24
过滤性能................................................ ...................... 24
输出NCO ................................................ ............................... 25
ADC超范围和增益控制............................................. 26
ADC超量程（ OR） ............................................. ................... 26
增益切换................................................ ............................ 26
DC校正................................................ ................................ 27
通道/芯片同步.............................................. ...... 28
串行端口接口（ SPI ） ............................................ .................. 29
配置使用SPI .............................................. ....... 29
硬件接口................................................ ..................... 29
SPI残疾人专用功能............................................... ............... 30
内存映射................................................ .................................. 31
读存储器映射寄存器表............................... 31
存储器映射寄存器表.............................................. ....... 32
存储器映射寄存器说明......................................... 36
应用信息................................................ .............. 39
设计指南................................................ ...................... 39
外形尺寸................................................ ....................... 40
订购指南................................................ .......................... 40
修订历史
4月11日 - 修订版0 ：初始版
第0版|第40 2
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