AD6653
目录
特点................................................. ............................................. 1
应用................................................. ...................................... 1
产品亮点................................................ ........................... 1
功能框图............................................... ............... 1
修订历史................................................ ............................... 3
概述................................................ ......................... 4
规格................................................. .................................... 5
ADC直流规范............................................... ................ 5
ADC交流规范............................................... ................ 6
数规格................................................ ................... 7
开关规格................................................ .............. 9
时序规格................................................ ................ 10
绝对最大额定值............................................... ........... 13
热特性................................................ ............ 13
ESD注意事项................................................ ................................ 13
引脚配置和功能说明......................... 14
等效电路................................................ ......................... 18
典型性能特征........................................... 19
工作原理............................................... ....................... 24
ADC体系结构................................................ ...................... 24
模拟输入注意事项............................................... ..... 24
电压基准................................................ ....................... 26
时钟输入注意事项............................................... ....... 27
功耗和待机模式..................................... 29
数字输出................................................ ........................... 30
数字下变频器................................................ .................. 31
下变频器模式................................................ .............. 31
数控振荡器（ NCO ） ............................. 31
半带抽取滤波器和FIR滤波器........................... 31
f
ADC
/ 8固定频率NCO ............................................ ....... 31
数控振荡器（ NCO ） ................................. 32
频率转换................................................ ............... 32
NCO同步................................................ ............... 32
相位偏移................................................ ................................. 32
NCO幅度和相位抖动.......................................... 32
抽取半带滤波器和FIR滤波器............................... 33
半带滤波器系数............................................. ....... 33
半带滤波器特性............................................. ............. 33
固定系数的FIR滤波器............................................. ......... 33
同步................................................. ......................... 34
结合滤波器性能............................................... ... 34
最终NCO ................................................ ................................... 34
ADC超范围和增益控制............................................. 35
快速检测概述............................................... .................. 35
ADC快幅度............................................... .................. 35
ADC超量程（ OR） ............................................. ................... 36
增益切换................................................ ............................ 36
信号监测................................................ ................................ 38
峰值检波方式............................................... .................... 38
RMS / MS幅度模式............................................. .......... 38
阈值交叉模式............................................... .......... 39
其他控制位............................................... .............. 39
DC校正................................................ ............................ 39
信号监测SPORT输出.............................................. 40 ..
通道/芯片同步.............................................. ...... 41
串行端口接口（ SPI ） ............................................ .................. 42
配置使用SPI .............................................. ....... 42
硬件接口................................................ ..................... 42
配置没有SPI .............................................. .. 43
SPI残疾人专用功能............................................... ............... 43
内存映射................................................ .................................. 44
读存储器映射寄存器表............................... 44
存储器映射寄存器表.............................................. ....... 45
存储器映射寄存器说明......................................... 49
应用信息................................................ .............. 53
设计指南................................................ ...................... 53
评估板................................................ ............................ 55
电源................................................ ............................ 55
输入信号................................................ ................................ 55
输出信号................................................ ............................ 55
默认操作与跳线选择设置................. 56
另类时钟配置............................................ 56
替代模拟输入驱动器配置...................... 57
原理图................................................. .................................. 58
评估板布局............................................... .......... 68
物料清单............................................... ............................ 76
外形尺寸................................................ ....................... 78
订购指南................................................ .......................... 78
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