• AD7656/ AD7656-1 - grounding considerations

    Q: Are there special grounding considerations for the AD7656/AD7656-1?

     

    A: At least one ground plane should be used. It can be common or split between the digital and analog sections. In the case of the split plane, join the digital and analog ground…

  • Difference between AD7656 and AD7656-1

    Q: What are the similarities and differences between AD7656 and AD7656-1?

    A:

    • The AD7656-1 is a pin to pin and software compatible upgrade to the AD7656.
    • The AD7656-1 has reduced decoupling requirements and reduced bill of materials cost compared…

  • AD7656/AD7656-1 - need for RESET

    Q: Do I need to reset the AD7656/AD7656-1 after each sample?

    A: In all modes, the parts should receive a RESET pulse after power-up. After the RESET has been applied, the part should convert normally.

  • AD7656/AD7656-1 - problems even after RESET

    Q: I have given the AD7656/AD7565-1 a RESET and a valid CONVST signal but I periodically get strange and repeatable data. I have factored out noise from input and timing issue during my debug. What else could I be missing?

    A: Ensure a stable reference…

  • AD7656与AD7656-1的区别

    AD7656和AD7656-1的输入结构有何区别？

    或者：

    A) 如果AD7656和AD7656-1的输入通过100kohm电阻连接到AGND，这两款器件有何区别？

    B) 如果AD7656和AD7656-1的输入直接连接到AGND，这两款器件有何区别？

    Attachments:

  • "BEMICRO FPGA PROJECT FOR AD7656-1 WITH NIOS DRIVER" ,the AD7656-1 IP

    In the ip core of AD7656-1 for NIOS, the converting start signal  is  defined as adc_convst_o. Its width is only 1 bit, but actually the AD7656-1 has 3 converting control pin CONV_A,CONV_B&CONV_C, I just want to know how to use the IP core to control…

  • AD7656: FAQs

    Q 

    My question is the same, but for two different devices, AD974 and AD7656. I
    want an input range of at least +/-5V, and from what I understand from the
    datasheets, I can use both of the devices as single ended, i.e. I can use the
    four inputs on…

  • ad7656

    I am using ad7656.

    When using for more than 3 hours, error occurs in ad7656.

    Only half of the output signal is output.  
    Compared with the circuit of deetasheet, it is no problem.
    thank you.

  • AD7656 vs. ADS8556

    I see that ADI's AD7656YSTZ converter is functional and pin compatible to TI's ADS8556IPM.

    I already have a design based on ADS8556. Are there any specific precautions to take in order to replace the TI part with AD7656?

    Please advise,

    T

  • AD7656 Gain Error

    I have a question on the way the AD7656 is specified in the Specification Table.

    The DC Accuracy is specified as Positive Full Scale Error (±0.75% FSR max, ±0.22% FSR Typ) and Negative Full Scale Error (the same values).

    When I use the device in a Bipolar…