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ADS4222: ADC that is compatible with Simultaneous Sampling

Honda
Intellectual 260 points
Part Number: ADS4222
Other Parts Discussed in Thread: ADC12DL040, ADC3222


Hi All

My customer is searching high speed A/D Converter that is compatible following specs.

(1) Dual and Simultaneous Sampling
(2) Resolution : over 12bit
(3) Sampling Rate : over 40Msps

Then, I selected 3 devices below, but I couldn't find out the word "Simultaneous sampling" in their datasheet.

(a) ADS4222
(b) ADC12DL040
(c) ADC3222

Are these devices compatible with Simultaneous Sampling ?
Or, are there any other good devices ?


Please advice

Best regards,
Honda

  • 0
    TI__Guru* 91947 points

    Honda,

    This information is called aperture delay. Below is what is listed on sheet 20 of the ADS4222 data sheet. This is what I think they are looking for.

    "Aperture delay matching Between the two channels of the same device ±70 ps"

    "Variation of aperture delay Between two devices at the same temperature and ±150 ps"

    You can look at the ADC3xxx family as these are newer devices. The ADC3222 is a dual 12 bit 50Msps part. There are many other parts in this family that sample faster and have up to 14 bits.

    Regards,

    Jim

  • 0 in reply to jim s
    Intellectual 260 points
    Jim san

    Thank you for your kind answer.

    I have additional question.
    I'd like to know the same specification regarding ADC12DL040 too.

    Do you have more information such as actual value ?

    Best regards,
    Honda
  • 0 in reply to Honda
    TI__Guru* 91947 points
    Honda,
    The data sheet mentions 2ns between channels but does not have a spec for part to part.
    Regards,
    Jim