• RE: SPICE model of AD8657

    Hi Akira,

    I had a quick run of AD8657 and AD824 DC parameters on LTSPICE, both offset voltage are within the datasheet spec which is 350uV for AD8657 and 100uV for AD824.

    Please see below for my test setup and simulation results.

         

    We usually model and…

  • Question of RESISTIVE LOAD   AD8657

    Please, please advise me.


    I read Datasheet of AD8657.

    "For example 1 kΩ of feedback resistor and assortment of 1 MΩ of load cause load resistance equivalent in 999 Ω as a result by an output.

    It's impossible that A.D. 8657/A.D. 8659 moves such…

  • AD8657制作4-20mA电流环路发送器

    对于下面这个电路有点不是很明白,来自AD8657datesheet。图中Rsense电流时怎么分析的,R3和C1是起什么作用的,ADR125的GND和右下方的地的区别,求指导,谢谢!

  • What amplifier would you recommend for a low power  4mA to 20 mA  current loop transmitter application?

    For low power application that requires RRIO and greater than 5V supply, I would recommend the AD8657 due to its low supply current of 22 uA per amplifier. The AD8657 is a 18V, micropower, rail-to-rail RRIO amplifier optimized for low power and wide operating…

  • RE: Which reference should be used with the AD5541A/42A?

    Suitable external references include the ADR421 and ADR431.Both are low noise reference sources and have the required noise/accuracy level to achieve the best performance from the AD5541A/42A.

    The reference buffer is also critical to the design because…

  • RE: AD9674 TGC Gain input driver

    Thanks Hugh, sorry for the late respond.

    I prefer below solution:

    cn0180(ad8657 change to ADA4896-2) + ADA4938

    Because I can not understand fully for other choices. It is high risk for me.

    For "The AD5429 has 2 channels of current output, you…

  • RE: AD8657ARMZ latch-up phenomena

    Hello,

         I used the term NVM to describe any on-chip storage technology, not specifically EEPROM.  The number of Digitrim products has greatly expanded since the writing of MT-37 and they are not limited to a specific memory technology.  I agree that this…

  • CN0179: 4-20 mA Low Power modify Vsys to 80V

    Hi

    I would like to modify the CN0179 , the link below,

    http://www.analog.com/media/en/reference-design-documentation/reference-designs/CN0179.pdf

    Specification

    Vsys = 80V

    Iout = 4mA ~ 20mA

    application : APD testing circuit for optical field

  • RE: What is the proper Rf value for AD8130?

    Hi Wojciech,

    Thank you for using AD8130. One thing that you should note is that the feedback resistor (Rf) affects the  effective load (Reff) of your amplifier. For inverting configuration, Reff = RL // Rf, and for non-inverting configuration Reff =

  • RE: VFB as a voltage reference

    Groger,

      Stability is really a function of the output impedance and the capacitive load.

    In general, the lower the power/supply current, the wimpier the output, so 50 pF

    can cause oscillation.  Unfortunately, there is no standardized parameter and …