• AD7770 Data output interface


    I have problems understanding data output interface on AD7770. Here is my ADC config sequence:

    08 8C (Channel disable)
    11 7C (General user config 1)

    13 C0 (General user config 3)

    14 82 (Dout format)

    60 03 (SRC N MSB)

    61 D0 (SRC N LSB)

    62 90 (SRC…

  • AD7770


         I have question regarding the analog channels of the AD7770: are the analog channels isolated in AD7770? Can they be coupled directly with signals coming from plcs? Isolation amplifiers required for AD7770 if necessary?

    Thank you!

  • AD7770 questions.


    I have two questions about ad7770.

       1. how long time to start and finish the conversion?

           'sar' has timing data(conversion time) on the data sheet, but no 'delta-sigma'.

       2. When does 'MCLK Switch Error' occur?

          I am trying…

  • AD7770 Temperature Sensor

    I’m using an AD7770 as my main ADC on a custom board I’m designing. I’ve been playing with some prototypes and experimenting with the AD7770’s built-in temperature sensor. Using the code from ADI’s website I’m reading back some odd values for temperature…

  • AD7770 maximum range


    I'm using the Eval Board of AD7770.

    The maximum amplitude I can measure between AIx+ and AIx- is +/- 1.65V (dual supply operation)

    According to the AD7770 datasheet, he noted that the maximum amplitude is +/- 2.5V (according to table 11 of…

  • AD7779 and AD7770


    I have a question about a differencis of digital flter between AD7770 and AD7779.
    Attached file is the rms noise and resolution performance table from the datasheet.
    AD7779 and AD7770 have same combination of ODR and Decimation Rate excluding 32kSPS…

  • AD7770 memmap crc error


    I use AD7770 with variable sps, and set new sps value approximately every 2ms. 

    Measurements are correct, but the ADC produces an error MEMMAP_CRC_ERR.

    Any other error flags is zero (Including any SPI errors).

    According to the documentation, I have…

  • AD7770 sampling progressing signals

    Hello all.

    I want to use the AD7770 to sample a precise point in input signal. I have 1 DAC that change the test signal for different level, and I do a single measure to each point.

    There is no information on the AD7770 datasheet about the process of…

  • AD7770 increasing ENOB

    We use TIA (current to voltage) very low noise and we want to get 20 ENOB. As I see in table 26 of the AD7770 datasheet we need to use 2000 SPS to get 19.77. But if we go to 8000SPS we get 18.76 which is only 1 bit less, so if I use oversample of 2^1=2…