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Results on Analog.com

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  1. AD622
    Production
    Product
    Instrumentation Amplifiers
    Low Cost Instrumentation Amplifier
    AD622

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    Sample & Buy

  2. AD622: Low Cost Instrumentation Amplifier Data Sheet
    Data Sheet

    PDF

    151 kB

  3. AD822
    Production
    Product
    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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  4. AD623
    Production
    Product
    Instrumentation Amplifiers
    Single and Dual-Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier
    AD623

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  5. AD620
    Production
    Product
    Instrumentation Amplifiers
    Low Drift, Low Power Instrumentation Amp with Set Gains of 1 to 10000
    AD620

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  6. AD626
    Production
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    Current Sense Amplifiers
    Low Cost, Single-Supply Differential Amplifier
    AD626

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  7. AD627
    Production
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    Instrumentation Amplifiers
    Micropower, Single and Dual Supply R/R Instrumentation Amplifier
    AD627

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  8. AD629
    Production
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    Difference Amplifiers
    High Common-Mode Voltage, Difference Amplifier
    AD629

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  9. AD621
    Production
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    Instrumentation Amplifiers
    Low Drift, Low Power Instrumentation Amp with fixed gains of 10 and 100
    AD621

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  10. AD775: 8-Bit 20 MSPS, 60 mW Sampling A/D Converter Data Sheet
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    332 kB

Results on EngineerZone

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    1. AD620AN opamp problem

      Forum Thread
      Answered
      Instrumentation Amplifiers
      25 March, 2023
      Hello, I want to read sensors with AD620AN. I am using wheatstone bridge. However, opamp doesnt give a reasonable output. Therefore, I build a test circuit. I attached the screenshot of my circuit. Is this circuit correct for testing the opamp? I am using LTSPICE and SPICE file that Analog …
      hardware

    2. AD620ANZ Instrumentation Amplifier acts as an single operational amplifier.

      Forum Thread
      Answered
      Instrumentation Amplifiers
      02 July, 2020
      … they worked. I tried them gain of 10 and 1000 with inverting and non-inverting mode. Is there anyone met this kind of problem. They are working as an single opamp not an instrumentation amplifier. The package marking on devices are all same, the marking is: AD620ANZ #1839 1780933 Thanks.
      amplifiersInstrumentation Amplifiersad620

    3. RE: AD620AN opamp problem

      Forum Reply
      Instrumentation Amplifiers
      28 March, 2023
      Hello electrosurfer, with the given parameters, your circuit violates the allowed input voltage range on all inputs. The amplifier will not run in spec, and so it cannot guarantue its intended parameters (like accuracy). Maybe the output comes nevertheless close to the correct value - but it's not guarantued. I …

    4. RE: AD620AN opamp problem

      Forum Reply
      Instrumentation Amplifiers
      28 March, 2023
      thank you for your comments. my main purpose is this circuit. R3 is the sensor 0-190ohm. this circuit converts 0-190ohm to 1-5V. when designing something, can i trust the results on the LTSPICE ?. ad620denee.asc

    5. RE: AD620AN opamp problem

      Forum Reply
      Instrumentation Amplifiers
      28 March, 2023
      Hello electrosurfer, the AD620 is not a simple OpAmp, it's an instrumentation amplifier (consisting of several OpAmps internally). For this type of amplifier one has to consider carefully the allowed voltage ranges of all inputs. In your simulation example, the input Vref (0V) is not in the allowed voltage …

    6. RE: AD620AN opamp problem

      Forum Reply
      Instrumentation Amplifiers
      28 March, 2023
      Hi Electrosurfer, Good day! For bridge sensor simulation you may check the link below on how to model bridge sensor in LTSpice. SPICE Model for a Full Bridge Strain Gauge Sensor I hope this helps. Best regards, Franz

    7. RE: AD620ANZ Instrumentation Amplifier acts as an single operational amplifier.

      Forum Reply
      Instrumentation Amplifiers
      03 July, 2020
      Can't tell much from the picture. It could be you hooked them up wrong. Are you trying to use on single supply? Post your schematic. Harry

    8. RE: AD620ANZ Instrumentation Amplifier acts as an single operational amplifier.

      Forum Reply
      Instrumentation Amplifiers
      03 July, 2020
      Thanks for sharing the document, well explaining the counterfeit parts. I don't know what is happened this IC's, here is the photos of one IC, what is your idea?

    9. RE: AD620ANZ Instrumentation Amplifier acts as an single operational amplifier.

      Forum Reply
      Instrumentation Amplifiers
      02 July, 2020
      Where did you buy them? I would suspect counterfeit parts. Someone bought op amps for five cents apiece an remarked them so they could sell them at a dollar. Scam been going on for 25+ years... https://www.analog.com/media/en/Other/About-ADI/Quality-Reliability/Eliminating-the-Top …

    10. RE: What is the difference of so many types of AD620? such as AD620AN, AD620ANZ,AD620BN,AD620BNZ.....

      Forum Reply
      Instrumentation Amplifiers
      17 April, 2019
      Hi John8966, The "A" and "B" are the grades of the part. They differ in terms of specifications. If you check page 3 of the datasheet, you will find that the specs are separated into 3 grades: A, B, and S. B-grade is better than A-grade, generally speaking …