• AD8643 specifications

    Hi there,

    We have a high precision multichannel photodiode frontend prototype up and running and are now facing a new customer requirement: They want the whole thing even smaller. Since our current design uses an opamp that is only available in 2 channels…

  • AD8643 for DAC bipolar output

    Using the DAC AD5542, I need an output swing of -5V to +5V. I'm using the configuration included in the DAC datasheet. I'm also using a Vref of 5V and a AD8643 as the output buffer. I decided on the AD8643 because it's a part that's present in the rest…

  • AD8643 Thermal Pad Connection

    Hi,

    This is a silly question, but what would happen if the AD8643 Thermal pad for LFCSP package is connected to Ground?

    I think Pads are often connected to Ground, so while making a PCB design, I mistakenly connected it to Ground instead of V+ as specified…

  • AD8643的LFCSP封装,底下焊盘是否要接地?

    ±3V供电,如果接地的话是否有什么影响?

  • Using AD5542 in bipolar mode

    I need an output swing of -5V to +5V, so I'm using the congifuration included in the datasheet. I'm using a Vref of 5V and a AD8643 as the output buffer. I decided on the AD8643 because it's a part that's present in the rest of my circuit, but I can change…

  • RE: Please let me know the input impedance.

    Hi DMN,

    I just wanted to point out that there is an input resistance graph in the AD8643 datasheet.

    The bias current changes less than 0.2pA from -10 to 10V, meaning the Input Resistance is greater than 1014 Ω over that range. Surface resistance of…

  • RE: Opamp selection

    Hi sahard

    Checking on Analog Devices’ portfolio you could look at ADA4096-4. ADA4096-4 meets most of your requirement, it is capable of +/-3V dual supply operation with a supply current of 65uA per amplifier. Its offset voltage is also relatively small…

  • RE: using AD8604  below -40°C

    Hello Anselm, 

    I will check with our experts whether data is available for the AD8604 at -55degC. Most likely it is not though, and we cannot guarantee operation at that temperature. We do have a couple of quad amplifiers that have been qualified down…

  • TAGS LIST: Amplifiers

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