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  1. AD8221
    Production
    Product
    Instrumentation Amplifiers
    Precision Instrumentation Amplifier
    AD8221

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    Sample & Buy

  2. MT-064: In-Amp DC Error Sources
    Tutorial

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    97 kB

  3. Discussion Between CareFusion and Analog Devices: Optimizing Performance and Lowering Power in an EEG Amplifier
    Technical Articles
    Jul 1, 2011

    Bill Kolasa,

    Harry Holt,

    Matthew Duff

    As continued breakthroughs in brain studies and EEG diagnostics are made, the EEG monitoring devices are expected to operate in new environments outside traditional clinical settings. These new environments lead to new design challenges—this paper addresses some of those challenges.
  4. AD8221: Precision Instrumentation Amplifier Data Sheet
    Data Sheet

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    701 kB

  5. The AD8221 - Setting a New Industry Standard for Instrumentation Amplifiers
    Technical Articles

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    582 kB

  6. AD8421
    Recommended for new designs
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    Instrumentation Amplifiers
    3 nV /√Hz, Low Power Instrumentation Amplifier
    AD8421

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  7. AD822
    Production
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    Low Input Bias Current Op Amps (≤100 pA)
    Single-Supply, Rail-to-Rail Low Power FET-Input Dual Op Amp
    AD822

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  8. AD8271
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    Difference Amplifiers
    Programmable Gain Precision Difference Amplifier
    AD8271

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  9. AD8227
    Production
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    Instrumentation Amplifiers
    Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier
    AD8227

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  10. AD8220
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    Instrumentation Amplifiers
    JFET Input Instrumentation Amplifier with Rail-to-Rail Output in MSOP Package
    AD8220

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    1. Can AD8221BR, AD8622 improve current design?

      Forum Thread
      Answered
      Operational Amplifiers
      07 June, 2016
      … is not suited for continuous high swing differential inputs. Here we are planning to replace LT1352 with AD8622. Queries to the forum are: 1) For AD8221BR, can we consider that VOS = VOSI + (VOSO/G) would hold true with VOSI=25uV and VOSO=200uV (values from AD8221BR datasheet, page4). 2) Would …
      Operational Amplifiers (Op Amps)ad8622amplifiersInstrumentation AmplifiersPrecision Op Amps (Vos ≤1mV & TCVos ≤2uV/C)lt1352LT1167High Voltage Op Amps =12Vad8221br

    2. AD8221BR Multisim Model

      Forum Thread
      Answered
      Instrumentation Amplifiers
      04 June, 2014
      Hi all, AD's spec sheet for the AD8221BR claims that it can be used with a single or dual power supply. I tried modeling a very simple DC circuit using a single source in Multisim (using Multisim's built in AD8221BR model), but it doesn't work correctly (output …
      in_amp

    3. RE: Can AD8221BR, AD8622 improve current design?

      Forum Reply
      Operational Amplifiers
      28 June, 2016
      Hi Emman, We filtered out the Op Amps which can be a suitable replacement, and selected AD8512 (B grade, dual Op amp part) for the design. In simulation we put AD8512 (single Op amp part) as parameters are same. Observations for Icc on both Instr Amp AD8221 and Op Amp …

    4. RE: Can AD8221BR, AD8622 improve current design?

      Forum Reply
      Operational Amplifiers
      23 June, 2016
      Hi Sathyadev, I don't get the email. Anyway, I already responded on your query. Let me know if you have any other questions. Best regards, Emman

    5. RE: Can AD8221BR, AD8622 improve current design?

      Forum Reply
      Operational Amplifiers
      22 June, 2016
      Hi Sathyadev, Here is what I observe from your schematic. Both of the circuit has a floating input. Put Ground in -IN and try to reverse the placement of the V4 (voltage_source schematic) and I1 (current source schematic) as shown on the picture below. For the voltage source schematic …

    6. RE: Can AD8221BR, AD8622 improve current design?

      Forum Reply
      Operational Amplifiers
      22 June, 2016
      Hi Emman, Just now sent you an email with a zip file. It was sent by giving a reply to your email which is in my inbox, and attached the file using the usual method. Please check if you got the email. Regards -Sathyadev

    7. RE: Can AD8221BR, AD8622 improve current design?

      Forum Reply
      Operational Amplifiers
      22 June, 2016
      Hi Emman, We done simulation using the planned Instr Amp (AD8221) and Op Amp (AD8622). It uses a pulse current source, which is implemented as shown in the image (Current_pulse) in attached zip file. We found that the output (taken at net COM1) does not vary when we change …

    8. RE: Can AD8221BR, AD8622 improve current design?

      Forum Reply
      Operational Amplifiers
      20 June, 2016
      Hi Emman, Getting very unexpected responses in our simulation. Circuit is same as the one used with LT devices in LT Spice tool, but with the LT devices replaced with AD ones. Can i share with you the ADIsimPE schematic, for a quick resolution? And how to share files with …

    9. RE: Can AD8221BR, AD8622 improve current design?

      Forum Reply
      Operational Amplifiers
      20 June, 2016
      Hi Sathyadev, You can attached your schematic here by replying on this thread --> use advance editor --> attach (located at the bottom right of the text box). Let me know if this will work for you. Best regards, Emman

    10. RE: Can AD8221BR, AD8622 improve current design?

      Forum Reply
      Operational Amplifiers
      20 June, 2016
      Ok, i downloaded the CIR file for AD8221, and we have started the simulations. -Sathyadev