• RE: Reference Buffer with AD8031 for AD768x

    Hi Michael,

    Correct the Output Voltage of AD8031 swings below 5V. The Circuit shown in page16 figure33 still suffice to drive the AD7688. This still with in the range of reference voltage.Please see table3 on page4 of the  AD7688 datasheet.

    regards,

    …

  • RE: Input requirement of AD7688

    Hi prasannag1993,

    http://www.analog.com/media/en/technical-documentation/data-sheets/AD7688.pdf

    Attached link is the technical documentation for AD7688.This includes reference designed circuit and other technical details to integrate the component into…

  • 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…

  • 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
    …

  • AD7688 VIO and Timing Specification

    Hi,

    VIO range is 1.8V to Vdd, but Timing Specification is guaranteed with 2.3V to 5.5V or VDD+0.3 V. Please refer to Page5.

    Can you guaranteed with 1.8V to Vdd? If not, please let me know about the below specification with VIO=1.8V.

    - tSCK

    - tDSD…

  • 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

  • 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。

  • RE: ENOB of AD7688  when set 1.0V to VREF.

    Hi, ysuzuki.

    Figure 13 of the AD7688 shows a graph of ENOB vs reference voltage from 2.3V to 5.5V. I will have to check if we have this for a reference of 1V as this is not a value we usually work with.

    Regards,

    Karen

  • -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…

  • AD7682 and AD7688 busy indicator usage

    Q 

    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, …