• RE: AD9225 CLK stop and resume

    Hello,

    The AD9225 is one of the 1st generation 12-bit CMOS ADC's released in the late 1990's.  As you state, it does not include a PWDN pin which exists on future generations of this product family.  No additional delay is required (other than…

  • RE: AD9629 readout issues.

    Hi Doug:

      I was able to validate the SPI write commands, using the register 0x08 for powerdown (drop in current sourced). I also checked the Test mode register 0x0D, and I was able to test the midscale short, positive FS and negative FS output test mode…

  • RE: ADC 12/14BIT, >2mS/S, Parallel digital interface

    Hi Meir,

    You may  want to check the ADI website and do a parametric search to filter the product display  base form your recommended specification.

    www.analog.com/.../10169

    Here are some ADCs that might help  you start with, kindly see attched file.

    …
    • ADCParametricSearch.xls

  • TAGS LIST: Data Converters

    AD693
    AD5410
    AD5412
    AD5420
    AD5422
    AD5735
    AD5755
    AD5755-1
    AD5737
    AD5757
    AD5421
    AD421
    AD5758
    AD7569
    AD7669
    AD7868
    AD7869
    AD5593R
    AD5592R
    AD5940
    AD5941
    AD7293
    AD7294-2
    AD7292
    AD5590
    AD7294
    L…

  • RE: Frequency Planning with AD9467 ADC

    Hi scottbehr,

    Choosing a high sample rate converter will definitely aide in reducing the cost and complexity of the anti-aliasing filter (AAF). Next, if possible, choose a 20MHz BW to be within baseband at Fs/4 or greater, this will push the harmonics…

    • AN-827_0.pdf

  • RE: Input matching of switched capacitor ADC (AN-742)

    Hi 6j5,

    The parallel equivalent in AN-742 is shown because we are looking at the input differential into the ADC. I also think you are referring to an older revision of this app note. So I attached the latest.

    In all the ADC impedance tables that are…

    • AN-742.pdf

  • Switched Capacitor ADC Input Impedance

    Hi,

    I'm studying how to properly design the ADC input of AD9258 and AD9268.

    I downloaded S-parameters files available on the website and I would like to understand why those 2 ADCs show a different type of impedance: one rather capacitive, and the…

    • AN-935.pdf

  • 关于宽带ADC前端设计考虑：用放大器还是用变压器驱动ADC？

    高性能魔术转换器（ADC）“前端”的输入配置设计对达到要求的系统性能至关重要 。优化总体设计取决于很多因素 ，包括应用性质、系统组成和ADC的结构。以下的问答主要节绍了使用放大器和变压器影响ADC前端设计的一些重要的实际考虑。


    问：放大器和变压器根本区别是什么？

    答：放大器是有源器件，而变压器是无源器件。放大器和其它所有的有源器件一样，消耗功率并且产生噪声；变压器不消耗功率并且产生的噪声可以忽略不计。两者都涉及到动态效应问题。

     

    问：为什么选择放大器？

    答：放大器的性能限制比变压器少…

  • RE: 模拟对话 2007年第41卷第1期

    关于宽带ADC前端设计考虑ΙΙ：用放大器还是用变压器驱动ADC？

    By Rob Reeder [rob.reeder@analog.com]
    Jim Caserta [jim.caserta@analog.com]

     

    高性能模数转换器（ADC）“前端”的输入配置设计对达到要求的系统性能至关重要 。优化总体设计取决于很多因素 ，包括应用性质、系统组成和ADC的结构。以下的问答主要节绍了使用放大器和变压器影响ADC前端设计的一些重要的实际考虑。

    问：放大器和变压器根本区别是什么？

    答：放大器是有源器件…