• AD6645输出二进制补码

    1.当AD6645输入为正，范围是0-1.1V时，输出的二进制补码最高位是符号位，后13位才代表实际值吗？

       那实际分辨率是13位，计算实际值时每一位代表的值 LSB= 1.1 / 2^13  这样理解对吗？

     

    2. 0V此时对应代码是00_0000_0000_00000吗？还是全为1

  • RE: FPGA Reference Design for AD6644/AD6645 and AD9764 Data Converters

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
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  • AD6645锁存输出

    AD6645的DRY引脚作用？可以不使用吗？

    根据手册上的电路图，实现锁存输出时74LCX574的CP引脚接DRY输出吗？能否直接接采样时钟信号

  • AD6645差分输入范围

    1.请问0-2V模拟信号经过AD8138转为差分信号输入AD6645，得到的差分信号是2.4±1V，是否超过了AD6645输入范围？

    2.手册上的这段话是说只能输入在2.4±0.55V吗？

  • RE: adc制板时，底噪控制的问题 AD6645 AD9238

    朋友讲解的很详细，谢谢，您的意思是说其实1mv算是很大的信号了吧？

  • AD6645 overshoot

    We design a data acquisition system and noticed an overshoot with a ~3us time constant in the ADC data. It is a small effect but it biases our data quality. I spent some time in identifying the source of the time constant.

    The source of the time constant…

    • attachments.zip

  • AD6645

    Hello,

    I use AD6645 evaluation board which has 105 MHz cyrstal to sample analog signal. I send sampled signal to a computer and plot that. The signal below which is at 200 KHz is sampled by AD6645 . The sine wave is generated by Agilent waveform generator…

  • 关于AD6645发烫的问题

    ADI工程师：

           您好！我最近在使用你们公司的AD6645的过程中遇到一些问题，想请教一下。我的电路图是按照AD6645的技术手册PDF画的，板子回来后进行测试，光给芯片上电，AD6645就很烫了，后来就烧了，从7、8、9这几个引脚的地方冒烟，不知道这是怎么回事。DVCC接的是3.3V，AVCC接的是5V。模拟地和数字地是分开的，通过一个0欧电阻相接。但是AD6645的裸露焊盘没有接地，不知道这会不会有影响。

  • AD6645  evaluation board

    Hi,

    I have purchased AD6645 evaluation board and trying to get data from it,

    I want to ask some questions. The board is equipped according to the AC coupled analog input configuration. Should I terminate the analog input SMA connection by R2=50 or…

  • Noise contributions when using AD6645 in undersampling application.

    I would like to calculate the noise expected when using an AD6645 in an undersampling application, to sample a signal at 180 MHz using a 55 MHz sample rate.

    Could you tell me a reference that shows me the contributions to noise and the calculations needed…