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Thread: 18/24 bit fast ADC?

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  1. #1

    Default 18/24 bit fast ADC?

    Hi,

    Can anyone recommend a good, reasonable cost 16/18/24 bit ADC for biomedical applications?
    If possible, please furnish the dealer's contacts as well.

    Thanks
    Cheers,
    Shaunak.
    Feel free to PM/email me.

    Visit me sometime @ http://shaunak.ws

  2. #2
    Administrator T-1000 vikas's Avatar
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    fast ? any ksps range requirements ?

    http://www.maxim-ic.com/datasheet/index.mvp/id/7240
    Vikas Patial

  3. #3

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    Hi Vikas,

    Thanks for your reply.

    I shouldn't have used "fast", 64 kSPS/32 kSPS [256 kSPS would be a dream scenario] should suffice for my needs.
    I have never used a Sigma Delta ADC before, are they particularly tricky to use?

    What about the prices?
    Cheers,
    Shaunak.
    Feel free to PM/email me.

    Visit me sometime @ http://shaunak.ws

  4. #4
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    I'll suggest TI ADCs for bio-medical applications, because except TI almost every other company says their products are not meant for medical applications. Secondly, samples are easily available.

    Regarding trickiness, you do realize that ADCs above 12 bits require very careful design.

    I remember meeting somebody at any electronic convention who told me that he used 24-bits ADCs in electronic balances, because it gave him effectively 14 bits with the 10 LSbs so wildly unstable that they were useless. Asked him why he did not use 14-bits ADC in the first place, he said that gave him just 12-bits, with the 2 LSbs unusable. He probably just didn't bother with the other factors while designing with ADCs, and threw in the biggest, bestest ADC that was out there hoping it would give him the bits needed even if this was half of what the ADC could do potentially.
    --
    Mohit Mahajan,
    www.BioZen.co.in

  5. #5
    Junior Member Newbie kubik's Avatar
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    Thanks for this suggestions!

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