数模混合信号前端的系统分割考虑ADI

简介：

问：为了获得更好的效果通常是将模拟的前端尽量压缩，而用数字处理来实现。
请问如何高效的实现？
答： This is just a system-partition concept. As you can see from this seminar, every partition manner has its advantage, it"s depending on your preference: performance ? cost ? It"s also depending on your product background: fixed standard ? high vol

问：AD9863相对9860有何改进?
答： AD9860: AFE for MMDS, MDS, LMDS, LMCS, 2 10 Bit 64MSPS A/D for Direct IF, 2 Aux 10 Bit A/D"s @ 1.25MSPS, with on chip 128MHz DDS 12 Bit Digital UpConverter Output BW =DC>65MHz, prgm. PLL Clock Multiplier, Vsys=3V @ 388mA, w/2x or 4x Upsampling Inte

问：What"s TTM?

答： Time to market

问：实验测试下来AD73360的线性度不好,如何处理?
答： Calibrate with software.

问：我现在做一个100万倍的音频放大器，带宽在100Hz~1.6KHz左右，采用多级放大，要求第一级放大器高增益，而且具有很低的噪声系数。请问各位老师：1.这种放大器能不能用通用的放大器（运算放大器或仪表放大器）实现？2.AD公司有那些器件适合做该放大器的第一级？谢谢！
答： ADI的仪表放大器应该可以满足您的要求。

问：我用AD620做高增益放大器时不能满足我的要求，请问AD有没有更低噪声系数的高增益放大器？谢谢！
答： You can consider AD8330,AD8332

问：这种MxFE主要用在哪一个领域最合适？谢谢
答： AD986x: Communications/MxFE: Modem, Cable/Set/Top Box.
AD9860/2: AFE for MMDS, MDS, LMDS, LMCS
AD9861: Portable application due to lower power consumption.
AD9860/2 can also be use as all kind of wireless  transceiver, for example, u

问：运放的漂移和精度在系统中如何解决？
答： 选取漂移和精度较高的运算放大器，您可以考虑ADI的精密放大器，请参考我们的运放的解决方案通报，在我们的网站上可以找到

问：系统分割中的四种选择,目前用得最多最普遍的是那种?在PCB设计和布局中如何实现?
答： Historically there has been a push to single chip SOC integration, as process geometries continue to shrink, this is starting to change. It is no longer cost effective to integrate complete systems, development cost and design risk are very high for mixed

问：数字地和模拟地是否需要分开？如何在连接到一起呢？
答： For system, ground should be seperated into analog/digital; bur specially for mixed signal IC like ADC/DAC, you should take it as analog IC with analog ground. Details you can refer to page 7-27 to 7-30 of section 7 of below PDF book:
http://www.analog