• AD7667 input question

    hi all:

          Looking at the AD7667 datasheet, I have troubles understanding Figure 45. Using the AD7667 in 16-Bit Bipolar and/or Wider Input Ranges.

    Why the op amp can convert  ±10V to 0-2.5V. Should U2 connect the analog input signal to R2 and R3? But the…

  • AD8610: Short circuit current - driving the AD7667

    Does the output buffer of AD8610 opamp has short current limitting circuits?
    What its characteristics?
    Can the AD8610 drive AD7667 ADC?

     

    AD8610 does have short circuit protection, limiting the current to typically
    65-100mA. The absolute…
  • A problem about the internal Vref Of AD7667

    Hello!

    I am now using an AD7667  conversion chip, and I use  the internal reference voltage, the parallel model, but my output has been FF7F, through inspection , I found that the internal reference voltage on the pin of REF is about 0.3V, this means…

  • RE: 关于AD7667和AD7653的区别?

    您好。AD7667在INL,DNL,SNR,ENOB等性能上较AD7653均有提升。

  • AD7667内部参考电压输出为0.5V,Why?

    您们好,我现在在用一款AD7667的模数转换芯片,采用的是内部参考电压,并行模式,但我的输出一直都是FF7F,经检查发现内部参考电压引脚上的电压我0.5V左右,也就是说内部参考电压出问题了。可是我的PD,PDREF,PDBUF都为低,SER/PAR设置为高(即并行),采用的是IMPULSE模式。出现这个问题是什么原因呢?谢谢前辈们@的帮忙!

  • 我使用AD7667采集锯齿波信号,经过线性拟合后发现锯齿波有周期性噪声波动(这里的锯齿波信号由信号发生器产生)

    第一次使用AD7667采集信号,电路按照ADI官网上提供的推荐电路,采集信号后做线性拟合,发现白噪声降下去后就会出现一定周期性的噪声波动,为了对比,使用信号发生器模拟产生相同的信号送到该AD中一样会出现这样的周期性噪声,请哪位大神帮忙解答,万分感谢。

  • RE: ADC nyquist filtering

    Apologies that the ADC you are using is not in the tool.  The AD7667 datasheet gives a recommendation for the RC filter and a suitable driver.  See Figure 26 and pages 18-19.

    www.analog.com/.../AD7667.pdf

  • 250khz or higher 16bit ADC with master SPI data output

    DO you have 16bit precision ADC with master SPI so it can generate clock pulses on its own. Like AD7667. But AD7667 has too many pins. 

    Is there a product like AD7685 that has SPI master feature? With AD7685, so I don't  have to use additional FPGA…

  • RE: grounding consideration for high precision ADC

    AD7667,. 

    AD7641 for next upgrade.  

  • RE: Precision infinite sample and hold circuit

    Hi,

       The AD7767 has a feature to make the part as the master where it can provide serial data clock and SYNC signal. The AD7667/AD7671 family has this feature you may check on these parts on the ADI site (http://www.analog.com/media/en/technical-documentation…