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 suited legacy LTC ADCs on datasheet.

Do you have any recommended legacy ADI ADCs which can work well with LTM2893? 

Best ragards

QI

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  • Hi Eric

    Thanks a lot for your information about  AD4003+LTM2893.

    Could you have any information about whether AD7983 is compatible with the LTM2893,  i am considering using AD7983 with LTM2893 because i have used AD7983 in my prototype design.

    and so I checked the following requirements in datesheet for LTM2893.

    ・6.25MHz ≤ SPI shift clock maximum frequency ≤ 100MHz

    ・Operates in SPI mode (0,0): SCK starts low, data captured on rising edge.

    ・Meets setup and hold timing requirements (tHDMISO2 and tSUMISO2) with the SPI shift clock operating between 6.25MHz and 100MHz.

    ・SPI shift clock (SCK) is static outside of CS (the ADC does not require a constant running SCK as a conversion clock) ・If used, the conversion start pulse width minimum is ≤ tCNVH

    and now  i  want to use 50MHz clock for AD7983.

    can  LTM2893 work well with AD7893, Do you have any idea?

    Best ragards

    YQ

Reply
  • Hi Eric

    Thanks a lot for your information about  AD4003+LTM2893.

    Could you have any information about whether AD7983 is compatible with the LTM2893,  i am considering using AD7983 with LTM2893 because i have used AD7983 in my prototype design.

    and so I checked the following requirements in datesheet for LTM2893.

    ・6.25MHz ≤ SPI shift clock maximum frequency ≤ 100MHz

    ・Operates in SPI mode (0,0): SCK starts low, data captured on rising edge.

    ・Meets setup and hold timing requirements (tHDMISO2 and tSUMISO2) with the SPI shift clock operating between 6.25MHz and 100MHz.

    ・SPI shift clock (SCK) is static outside of CS (the ADC does not require a constant running SCK as a conversion clock) ・If used, the conversion start pulse width minimum is ≤ tCNVH

    and now  i  want to use 50MHz clock for AD7983.

    can  LTM2893 work well with AD7893, Do you have any idea?

    Best ragards

    YQ

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