• OP177 SPICE model

    I have downloaded the SPICE model file for the OP177 but found that it actually contains the model for the OP1177.

    Where can I get the proper SPICE model file for the OP177 ?

  • RE: OP177 power sequence

    Hello Osamu,

    I will check into the power supply sequencing of the OP177 and get back to you.



  • Offset Voltage adjustment for OP177

    Dear Sir/Madam,

    Our customer asked th following question to me.

    As for your OPAMP OP177GSZ,

    your datasheet shows the adjustable offset voltage adjustment range is +/-3mV typ by adding 20kohm POT on Rp.

    So if we need it +/-6mV, then what is the external…

  • 442 - I cannot find the datasheet for the 442 (old OPAMP Module)

    I cannot find the datasheet for the 442 (old OPAMP Module)


    Please find attached.

    A suitable replacement is the OP177 or OP1177.
  • RE: OP177G / Difference Amp

    Dear Harry,

    Thanks for the informative reply. I have hit the books since your reply and made an excel sheet that incorporates all the details (input offset volts, current, input bias current, Rth of the wheatstone bridge). Waiting to get back to office…

  • AD620, digitally adjusted reference pin


    I use AD620 in order to amplify my loadcell signal. I have +/-15V present. I regulate these voltages to 10V and -11V. I use 10V to excite loadcell. Also I use 10V to power AD620 and OP177 op-amps. (There is a filtering circuit after AD620 with couple…

  • RE: OP-177

    Hi again. can ı ask you another question. When ı read op177 datasheet and ı see typical offset voltage is 40 uV but ı set up test circuit my offset voltage 5 mV. Maybe this is a problem. What can ı do for this.

  • RE: ad8138驱动AD7357,AD7357基准输出变为2.9V?


    若是数据手册中的Figure 21,AD8138和基准没有关系吧,经过OP177隔离了

  • RE: short pulse amplifier

    what is Y1 in your schematic. I do not follow exactly what you are doing but you can look at figure 36 of OP77 datasheet hwich gives you detection and amplification. You may need to do adjustment for your needs.


  • 恒流源电路问题,不同运放效果还不一样,不知道怎么回事!