• Dose LTM2893 suit AD7983?

    Hello everyone

    I want to use LTM2893 to isolate SPI I/F for AD7983, is AD7983 compatible with the LTM2893?

    On the datasheet of LTM2893, It is mentioned LTM2893 is optimized for isolating 1Msps high resolution 18-bit SAR ADCs, but these are only some…

  • AD7983 REF Pin behavior

    I'm working with an AD7983 and hoping to get more information regarding the internal functionality of the REF pin. The datasheet describes how to use this pin from a top-level perspective, but I'm looking for a more technical description.


  • AD7983 Overvoltage Input

    Let me first give a quick overview of the system.  I am using an AD7983 ADC to read 20 multiplexed signals.  I am running the ADC at 1MSPS.  I have a diode clamp to ground prior to the buffer driving the ADC.  This keeps the input to the ADC to about -0.6V…

  • EVAL-AD7983-PMDZ unexpected offset


    I driving EVAL-AD7983-PMDZ by Unipolar, Single-Ended sinusoidal signal (Vpp=4V, Voffset=2 so Vmin=0, Vmax=4).

    R2 and R4 were removed from the EVAL-AD7983-PMDZ PCB because they give the additional useless voltage offset:

    I see that samples are…

  • AD7983 input driven by multiplex signals

    I want to drive the AD7983 with a multiplexed signal.  I am having a hard time understanding the best time to switch the multiplexor based on the timing diagram in the datasheet.

    I would like to switch the multiplexor as soon as possible after the rising…

  • AD9783: the function of REFIO

    Hello ,

    I have a question about the function of REFIO of AD7983.

    In the pin descrition tabe, Table 8, REFIO pin is described as "Analog Reference Input/Output (1.2 V Nominal)."

    This description include "Input", but I think that the AD7983…

  • RE: Strange output from AD7984

    Hi Ed,

    You cannot use a true differential ADC in this single ended manner without a SE-to-diff amplifier stage. I am assuming you are grounding the negative input (IN-)? The ADC must maintain a strict common mode spec of Vref/2 +/-5% which is specified…

  • RE: ADC with really "True differential input"

    Hi vlad8016,

             What Klaus mentioned are right. There are three most common types of ADC input structure a.) Single- Ended b.) Pseudo Differential c.) True Differential.  From your description above I can see that you are looking for ADC that has a pseudo…

  • AD7984: Working with true differential input precision SAR ADCs

    Hi, all,

    I'm using an AD7984 to capture the output of a dual slope integrator circuit.  I'm using it in /CS mode, 3-wire, with no busy indicator.  Sampling at 500 KHz. Vref = 3.3V.  SCLK runs at 12 MHz.  It's a 16 channel system, but I'm using 16…

  • RE: AD7683 and Sampling clock

    Hi Chaitanya,

    The AD7683 has a Serial Data Clock Input - DCLOCK. You can vary the sampling frequency by changing the speed of a clock to DCLCOK input Since the conversion result on DOUT pin is synchronized to DCLOCK.


    Note that the AD7683 is compatible…