• OP4177: FAQ

    FAQ

  • OP4177: Can I operate this device with a single supply?

    Q 

    Can I operate OP4177 with a single supply, datasheet only specifies dual
    supplies?

     

    A 

    Yes, you can use OP4177 with a single supply but you need to be careful that
    the input or output does not exceed the headroom limitations (1V from both the

    …

  • OP1177 / OP2177 / OP4177 Input impedance

    Q 

    I don't find any information about the input impedance in the datasheet. Could
    you provide me any?

     

    A 

    We do not have the data that you are looking for. Based on what we know about
    the design, differential resistance is roughly 6 MΩ, common mode…

  • What is the current noise density(f=1KHz) of the OP4177?

    Hi team,

    Our products are sensitive to op amp noise performance. I'm having some problems researching the noise performance of the OP4177.

    I see a current noise density of 0.2pA/√Hz in the OP4177 DataSheet.

    But when I used the spice model of…

  • OP1177/OP2177/OP4177 addtional information on slew rate

    Q 

    I'm looking for information about slew rate of the OP2177.

    In the datasheet there is only a typical value with one load  (0.7V/µs).

    Do you have more data:
    - Min / max value over the temperature  range
    - variation with the load

     

    A 

    The slew…

  • OP4177 unused Op amp section

    Hello

                Customer use OP4177 and just only use three channel. If fourth Op amp not used on their application, Can the op Amp be floating or connect to voltage follower is better? Thank you. 

    BR

    Patrick

  • RE: OP4177 Power Voltage Supply

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • RE: OP4177 Current Limit on Inputs

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • Inconsistencies in Datasheet Formulas for OP1177 / OP2177 / OP4177

    There are few inconsistencies in the "BAND-PASS KRC OR SALLEN-KEY FILTER " section on page 21, Rev. G of this datasheet: http://www.analog.com/media/en/technical-documentation/data-sheets/OP1177_2177_4177.pdf

    Formula (3):        Q = K * sqrt(R1 / R2…

  • OP4177  as voltage follower for battery cells

    I am using an OP4177 in an externally powered application (voltage follower for battery cells). Is it OK to leave the voltage input from the cells connected when the supply power is off?