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Showing 510 results View by: Thread Post Sort by
    Answered
  • RE: AC coupling for bio-potential measurements

    Hooman Hashemi
    Hooman Hashemi
    Resolved
    Hi Jeffrey, I think that the RHS schematic carries the input CM voltage before the AC coupling caps to the instrumentation amplifier OPA's but the one on the left biases these OPA's close to ground (or to a fixed reference voltage if you lift R2 from…
    • over 8 years ago
    • Amplifiers
    • Amplifiers forum
  • Answered
  • RE: OPA454: How close to negative rail can you get your output

    Hooman Hashemi
    Hooman Hashemi
    Resolved
    Hi Russell, The supply voltages do not need to be symmetrical. Regards, Hooman
    • over 8 years ago
    • Amplifiers
    • Amplifiers forum
  • RE: OPAx187 offset voltage

    Hooman Hashemi
    Hooman Hashemi
    Hi John, Thanks for bringing this to our attention. We'll update the OPA2187 offset voltage in the parametric table to show 10uV (not 10mV) maximum: Regards, Hooman
    • over 8 years ago
    • Amplifiers
    • Amplifiers forum
  • Answered
  • RE: TINA/Spice/TL084: TL084 as 16-bit ADC driver for TMS320F28377D

    Hooman Hashemi
    Hooman Hashemi
    Resolved
    H Amtech, You are correct in that Transient (or AC response) analysis with TINA-TI (or Pspice equivalent) will not show any warnings if you exceed the device operating supply voltage range. I think that's true for every amplifier I have seen before…
    • over 8 years ago
    • Amplifiers
    • Amplifiers forum
  • RE: TINA/Spice/OPA454: Output Voltage Falling Below 10V

    Hooman Hashemi
    Hooman Hashemi
    Hi Russel, Sounds like you are running into input CM voltage range limitation (which is 2.5V away from either supply rail): The input(s) should always be higher 2.5V and lower than 42.5V if you are running the part with a single +45V power supply…
    • over 8 years ago
    • Amplifiers
    • Amplifiers forum
  • RE: LMH6609: @MHz parameter description

    Hooman Hashemi
    Hooman Hashemi
    Hello, The "@ MHz" relates to the frequency where distortion (2nd and 3rd or HD2, and HD3) are measured, as shown below: Regards, Hooman
    • over 8 years ago
    • Amplifiers
    • Amplifiers forum
  • RE: Problem with TX-SDK-V2 kit

    Hooman Hashemi
    Hooman Hashemi
    Hi Dominique, Sorry about the delay in getting back to you. These devices are NRND now and we're not actively supporting them anymore. Unfortunately I cannot help you with the purchase of devices, but I've seen some distributors have spare / fresh…
    • over 8 years ago
    • Data converters
    • Data converters forum
  • RE: TX-SDK-V1: Question about power supply

    Hooman Hashemi
    Hooman Hashemi
    Hello, I'd follow the power up / power down sequence exactly as shown in the documentation please. Please also note that the devices in the TX-SDK-V1 kit (LM96530, LM96551, LM96570) are now either Not Recommended for New Designs (NRND) or Life Time…
    • over 8 years ago
    • Data converters
    • Data converters forum
  • Answered
  • RE: OPA337: Doubt in application note "Signal conditioning for piezoelectric sensors"

    Hooman Hashemi
    Hooman Hashemi
    Resolved
    Hi Miheer, In this application note you noted: The page 4 expression involving "5.85" in the denominator is the result of evaluating Equation 7 at 5Hz: From Figure 6 schematic: RFB= 270M CFB = 680pF So, the denominator "value" at f = 5Hz…
    • over 9 years ago
    • Amplifiers
    • Amplifiers forum
  • RE: LMC662: LMC662 600ohm drive

    Hooman Hashemi
    Hooman Hashemi
    Hi Kai, What I showed you was just an example. I don't know your operating conditions. If you tell me what you're trying to do / drive with the LMC662 / MC33202, then I can help you better to let you know whether you are in anyway limited by the output…
    • over 9 years ago
    • Amplifiers
    • Amplifiers forum
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