• AD7768-1 问题

    我正在使用AD7768-1芯片,遇到以下问题:
    1.抽取率设置成X32、X64时从转换结果寄存器读到的值有时候都是0,有时候全是参考电压对应AD值,设置成128,256则可以读取到正确的AD值
    2.参考电压是3V,采集一个1khz,幅值2v的正弦电压的1024个数据,把采集到的AD值转换成电压值,转换结果整体能还原成正弦波,但是偶尔会有一些转换结果比较异常,接近参考电压值压值3v。
    当前使用SPI控制模式,单次读取模式。

    参数设置:
    //启动
    ad7768_spi_reg_write(AD7768_REG_SYNC_RESET…

  • PGA for AD7768-1

    Hello,

    I have to measure +/-10V single ended signals up to 200kHz with the AD7768-1 (24bit resolution, 512ksps).

    Now, my customer asks for a PGA with gain = 1, 2 and 4.

    Which signal conditoning solution do you suggest that maintains the noise and distortion…

  • SNR of AD7768-1 with AD8250 at 48 kHz input frequency

    Hello,

    my customer asks for the SNR that is to be expected with the following signal chain:

    48 kHz input-signal ---> AD8250 ---> LTC6363 ----> AD7768-1

    AD8250 is powered by +/-15 Volt.
    The LTC6363 translates the up to +/-10V output from the AD8250…

  • RE: ad7768-1 linux driver can not used on raspberry4b

    Any SPI timing waveform which follows the AD7768-1 SPI timing in the datasheet will be fine. You may make your raspberry4B interface to be compatible to the datasheet timing.

  • Using a single Reference with multiple AD7768-1

    Hello,

    I have a design that will use up to 16 (sixteen) AD7768-1 delta-sigma ADC.

    Due to limited PCB area, I would like to use a single reference for all AD7768-1.

    According to the AD7768-1 data sheet, the AD7768-1 has fully buffered reference inputs…

  • AD7768-1 strange DOUT behavior

    We are doing a data acquisition system based on the AD7768-1 and I’m seeing some strange behavior of the DOUT (MISO) line, that ultimately results an incorrect data acquisition.

    In some cases the DOUT line resets too early, leaving a really small…

  • AD7768-1 analog input overvoltage protection?

    Hello,

    - does the AD7768-1 have internal ov-protection diodes between the AINs and AVDD1?
    - what is the maximum rating on the current handling of these diodes?

    - I want to have AVDD1 = UREF = 5V. Is this allowed? Does this degrade performance somewhat…

  • How to measure a single-ended +/-10V signal with the AD7768-1?

    Hello,

    I have a DC-coupled +/-10V single-ended signal (max. 200kHz) from a high impedance source that I want to measure with the AD7768-1.

    Now I wonder about two things:

    (1) which will be the best OP-Amp solution to down-scale the single-ended +/-10V…

  • ad7768-1

    Hello,

    I want to use the AD7768-1 with 5V AVDD1 = Vref and 3,3V VDDIO.
    In demo-circuits the AVDD2 is connected to probably noisy VDDIO!
    Wouldn't it be better to supply AVDD2 from 5V over a R-C-Filter, that would lower the voltage to around 3V?

    Additionally…

  • Can we configure the AD7768-1 as an ADC with an adjustable sampling frequency?

    Ask for your helping.

    Can we configure the AD7768-1 as an ADC with an adjustable sampling frequency?

    Can we directly switch the sampling frequency of the chip through the program? I mean don't change the external hardware device. Simply use the FPGA to…