• AD7688: FAQ

    FAQ

  • AD7688: Using with ADuM1301

    Q 

    We are planing to use either AD7688 or the AD7686 A2D-Converter due to their
    excellent SNR in our application. These converters are capable of a throughput
    of 500kSamp/sec, we want to use this full speed. Thus the aquisition time to
    get out the…

  • AD7682 and AD7688 busy indicator

    Q 

    1.
    I am using AD7682 and AD7688 components. I do accesses through a PLD and I am
    wondering how using the busy indicator.

    In the AD7682 datasheet, in the paragraph "General timing with a busy
    indicator", it is written: "At the EOC, if CNV…

  • -URGENT- AD7688 analog input is instability.

    Hi

    We're facing a issue that the analog input is instability below.

    CH4 is IN+. CH3 is SDO.

    Actually the driver amp is OPA197 (Ti), we recommend ADA4084-1 instead of Ti.

    But the customer say if the instability is not improved within this week, he may…

  • RE: Input requirement of AD7688

    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,
    …

  • AD7688采样问题

    最近用AD7688采集数据，可是采集到的信号却没有峰值，如下图所示：

    峰值处好像饱和了一样，请问有原因造成的。我的信号是1000Hz，采样频率是16K。

  • AD7688无法采集正弦信号的幅值

    最近在用AD7688调试采样电路，用的是SPI串口通讯，信号时100Hz正弦波，把采样率设置在12800Hz，但是采集到的信号在峰值处是饱和形式的，如下图所示。

    我的电路原理图如下图：

    请问是采样率的原因吗，我试过其他额采样率，要么也是这种情况，要么采集的数据不对。请问有哪些可能的原因。

    谢谢。

  • AD7688的时钟线一直处于高电平状态

    大家好，最近在调试AD7688这款ADC，现在遇到的问题是时钟线一直都是高电平状态，数据无法发送，请问有什么可能的原因造成的，谢谢？

    • attachments.zip

  • ENOB of AD7688  when set 1.0V to VREF.

    Hello,

    I have a question from our customer about AD7688 ENOB performance.

    In the datasheet page-4, the vref input voltage range is described as 0.5V to VDD+0.3V.

    Our customer is going to use 1.0V for vref voltage.

    And they needs 14bit ENOB in this…

  • The I/O timing of AD7688 in use of VIO 1.8V.

    Hello,

    I have a question from a customer about timing parameter of AD7688.

    The VIO range is described as 1.8V to Vdd+0.3 in page4 of the datasheet.

    But "specified performnace" range is 2.3V to Vdd+0.3V.

    Our customer wants to know the I/O…