• Problems with AD7739

    Hello. I'm using ad7739 with avr through spi.

    In the communication pin DOUT AD7739 does not change its state (0 or 1 depending on the internal pullup microcontroller). Pin CS is low.

    Is there any idea , what's the problem ? Thank you!

    Circuit…

  • AD7739 AIN Protection

    The AD7739 datasheet states that the device can operate with +/- 2.5 volt inputs.

    The Absolute Maximum ratings for the AIN pins are listed as -0.3V to AVDD + 0.3V which would appear to contradict the input voltage range.

    I wish to use the device with…

  • AD7739 problem

    Channel data registers are not sending correct data back when channel data register is polled. We tried at least 10 new ics they are doing they same thing. I have attached data from the logic analyzer. 

  • +/- 2.5V inputs on AD7739

    Hi All,

    I am looking into AD7739 for +/- 2.5V inputs application. I figured it out that if +/-2.5V on all AIN pins, the AGND has to be at -2.5V and DGND has to be at -2.5V also (The absolute limits for the device between AGND and DGND is +/- 0.3V, AIN…

  • AD7739  AINCOM端怎么接

    请问AD7739输入差分应用时,AINCOM端怎么接?作为输入的参考端,一般应该接地,但数据手册中说明输入范围在0.2--AVDD-0.3,FIG27中用虚线连接参考电压正端。请专家指教

  • S3C2440与AD7739使用问题

    我用的S3C2440的SPI0与AD7739通信,S3C2440作为主机,请问波特率应根据什么设置,应设置为多少?问题比较低级,请勿见笑。

  • AD7739输出问题,值不变

    AD7739连续运行一段时间后,大部分时间是1天以后,采集值就不变了,示波器看SPI波形,发现Dout输出一直为低电平,而其它的,CS,SCK,Din,Ready信号则是正常的。通过SPI发送复位命令,初始化命令后,AD7739能继续工作。请问这种情况是哪里出了问题呢?正常转换时发现,Dout的波形有异常,出现下斜坡,见附件图片。

  • AD7739 转换输出的电压值比模拟输入的电压小一个25mV

    上图是原理设计图,用高精度万用表测量出转换输出的电压值比模拟输入的电压小一个25mV,通道校准也做过同样是一样的?请专家帮忙解答下;谢谢!

  • -Regarding AD7175-8 input range

    Hello,

     I have a query regarding the input voltage range of AD7175-8. In my first design, I have used AD7739 now I have to replace that with 16 channel ADC, so I choose AD7175-8.

    in AD7739 IC it mentions the input range +625 mV, ±625 mV, +1.25 V, ±1.25…