• AD8675 LTspice XVll model versus model AD8675 spice model

    Dear sir

    I experiment a different behavior regarding input bias current in AD8675 amplifier according models I use with LTSPICE.

    When I simulate the AD8675 component using the model provided with LT SPICE XVll software, I get perfect match with datasheet…

  • AD8675 Power Up Sequence

    Hi Adi

    I use a AD8675 in a circuit just before a DAC. It buffers a voltage reference signal of 5V.

    Recently the op amp did not work after a start up. +-15V was applied as supply voltages.

    I wonder if start up sequence not was not correct. Maybe 5V on…

  • AD8675 phase reserval

    Q 

    Have you information on  the phase reversal for the AD8675?

     

    A 

    The AD8675 does not phase reverse when input is within input voltage range IVR.

  • AD8675 open null pins

    Q 

    We plan to use the AD8675. From the data sheet it is not clear to us, if we can
    left open the null pins (1,8) if not needed in the schematic?

    Thank you for a short feedback.

     

    A 

    Yes, you can leave it unconnected. It is optional from Figure…

  • SPICE model of AD8675 ... Problem ?

    Hi,

    I am currently simulating with the AD8675.

    AC analysis.

    If I use it with common feedback stuff. It works.

    But the output can reach kilovolts with a supply of +/- 15V

    On the other hand, on a particular setup, I do get some other strange behavior…

  • AD8675上电锁死

    Anonymous
    Anonymous

         用AD8675做锁相环有源环路滤波时，出现开关机运放锁死（正向端电压1.6V左右，负向端电压0.9V左右）。运放正向端采用两个1KΩ电阻分压给偏置，负向端接电荷泵输出。运放供电15V以下，不会出现这个现象，高于20V以后，出现次数很多。什么原因？？？？急等

  • AD8675 and AD8597/99 Input impedance?

    Hi all - hope you're able to help me with this.

    I've been unable to find the input impedance and Cin for both AD8675 and AD8597/99 in the datasheet(s).
    - I apologize if I've missed the obvius....

    Thx in advance

    Kind regards

    Kasper

  • AD8675 Input Voltage Range, Noise & LTSPICE model

    Hello

    I'm tempted to use AD8675/AD8676 but I have a couple of open questions:

    In the parametric search, the input voltage headroom for AD8675/AD8676 is given as 1.5V (typ) and 2.5V (max).

    Under what conditions do I have to consider the max specification…

  • If AD8675 can be power with single power suply?

    If AD8675 can be power with single power suply?

    For example, only use +12V to Pin7, Pin4 

    connect to GND?

    Thanks! 

  • AD8675/AD8676: Exact meaning of Maximal Differential Input Voltage in Datasheet

    Hi everyone,

    My Situation:

    If build a circuit with some filter capacitors (10uF) an the input's of the OpAmp AD8676 and have the problem that after some time (days of power up/down) suddenly the OpAmp start to leak at it's positive input an sink about…