AD9912
目录
特点................................................. ............................................. 1
应用................................................. ...................................... 1
概述................................................ ......................... 1
基本框图............................................... ......................... 1
修订历史................................................ ............................... 3
规格................................................. .................................... 4
直流规范................................................ ......................... 4
交流规范................................................ .......................... 6
绝对最大额定值............................................... ............. 8
热阻................................................ ...................... 8
ESD注意事项................................................ .................................. 8
引脚配置和功能说明............................. 9
典型性能特征........................................... 11
输入/输出端接建议.......................... 16
工作原理............................................... ....................... 17
概述................................................. ..................................... 17
直接数字频率合成器（ DDS ） ............................................ 17
数字 - 模拟（ DAC ）输出......................................... ... 18
重建滤波器................................................ ................. 18
FDBK_IN输入................................................ ........................ 19
系统时钟输入................................................ ........................... 20
输出时钟驱动器和2 ×倍频............. 22
谐波杂散降低............................................... ......... 22
热性能................................................ .................... 24
上电............................................... .......................................... 25
上电复位.............................................. ............................ 25
上电默认输出频率................................ 25
供电分区............................................... .............. 26
3.3 V电源............................................... ............................... 26
1.8 V电源............................................... ............................... 26
串行控制端口............................................... .......................... 27
串行控制端口引脚说明....................................... 27
串行控制端口的操作............................................. 27
指令字（ 16位） ........................................... ..... 28
MSB / LSB优先传输............................................. .............. 28
I / O寄存器映射............................................. ............................... 31
I / O寄存器说明............................................. ................. 33
串行端口配置（寄存器0x0000到
寄存器0×0005 ） .............................. .......................... 33
掉电和复位（寄存器0×0010到
注册0x0013 ） .............................. .......................... 33
系统时钟（寄存器为0x0020到寄存器0×0022 ） ............. 34
CMOS输出分频器（ S-分频） （注册0100到
注册0x0106 ） .............................. .......................... 35
频率调谐字（注册0x01A0到
注册0x01AD ） .............................. ........................ 35
倍频器和输出驱动器（寄存器0x0200到
注册0x0201 ） .............................. .......................... 37
校准（用户可访问的修剪） （注册的0x0400到
注册0x0410 ） .............................. .......................... 37
谐波杂散抑制（寄存器0x0500到
注册0x0509 ） .............................. .......................... 37
外形尺寸................................................ ....................... 39
订购指南................................................ .......................... 39
修订版F |页40 2
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