• AD5686R/AD5685R/AD5684R

    Hello,

    I have just implemented AD5685R in a new design however when powering up the system the AD5685R circuit (TSSOP16) get very hot.

    If I strip of everything surrounding the circuit except for connecting 5V to Vdd and pin 10 (GAIN) and 0V to GND…

  • Reference input AD5686R

    What is refference current,, input range and input Impedance for VRef in if is used as input for externa reference voltage?

    In addition to considering the use of internal and external reference connected through the switch any as DG411 Ron 20ohm and…

  • AD5686R 3 lines control

    Sorry for primitive questons.

    I would like to use AD5686R by minimum control lines.
    FPGA controls only 3 pins ,SYNCb,SCLK,SDIN.
    Other lines will be fixed,LDACb = GND , RESETb = Vlogic, RSTSEL = GND, example.

    Could I have any comment or attention about…

  • AD5686R Voltage Ref Accuracy

    Hello,

    Can someone please assist with these three questions?

    We want to be able to adjust it for better accuracy, since the datasheet shows +/-2.5mV offset. Is it possible to use the Ref pin as a summing node so that we can inject a calibration voltage…

  • 关于AD5686R电源问题

            我使用了AD5686R芯片作为4路AD输出,,结果发现这块电路会导致我系统的3.3V电压升至3.6V,经分析,应该是这个片子的问题。

            我的电路如下,将Vlogic设计为3.3V,将电源供电VDD与增益GAIN设计为5V,这与参考设计不同,官方给出的参考电路图为Vlogic也是5V,请问我这样设计有什么问题么,谢谢!

  • AD5686R operation with GAIN=2

    Hi,

    Request your help to understand why the gain error is improving with Gain=2 compared to Gain=1?

    Also with Vref=2.5V & Gain=2, what should be the minimum VDD requirement to get output of 3V?

    I have seen Vref+1.5 as the minimum power supply required…

  • CONNECTION ERROR: AD5686R Evaluation Board was not detected

    SDP board(EVAL-SDP-CS1Z) is detected by both software and the led on SDP board blinks. But error AD5686R Evaluation Board(EVAL-AD5686RSDZ) was not detected appears after that.

    Tired 2 software;

     

    1. AD5684R Evaluation Software( CD came with EVAL-AD5686RSDZ…

  • AD5686R的输出有误差

    按照给的例程改的程序。

    有一块板子上有两个DA芯片,都多少有点问题。

    其中一个芯片,如,给A通道输出0.3V,B输出0.6V,C输出1V。

    在实际测试中,偶尔会出现B输出1V,C也输出1V的情况。一般出现之后,复位一到两次,就正常了。

    第二个芯片的主要问题是这样的,如给A通道0.1V,B通道0.3V,C通道0.808V。

    AB通道都正常,但是C通道输出偶尔会为0.819V。

    C通道不是所有的电压都会出错。比如C输出0.6225,再改变为0.6224,最后变为0.6227,不断循环输出这三个电压…

  • AD5686R/AD5685R/AD5684R transfer function error?


    Revision C of the AD5686R/AD5685R/AD5684R datasheet shows the transfer function of the device as

    Vout = Vref * Gain * (D / (2^n))

    It then goes on to say that the valid code ranges are as follows:

    0 to 4,095 for the 12-bit device.

    0 to 16,383 for…

  • AD5686R的转换数据有误

    使用官方给的例程,电源和逻辑电源接3.3V,GAIN接地。RESEL接地。LDAC和RESET初始化时分别接低电平和高电平。

    以下是主函数中的程序:


    AD568X_SYNC= 0;   //片选信号
    AD568X_InternalVoltageReference(AD568X_INT_REF_OFF);    //使用外部参考电压
    AD568X_SYNC= 1;
    delay_us(50);
     

    AD568X_SYNC= 0;
    AD568X_PowerMode(AD568X_ADDR_DAC_C,AD568X_PD_NORMAL…