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 ?
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…
The OP177 is not RR output.
You need a cap on the LM317 adj pin to ground.
What is the diode doing on the output of the op amp??
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…
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…
The OP07 was a first generation precision op amp. I would not do a new design with it.
We have done several generations since then: OP07 -> OP77 - OP177 -> OP1177 -> AD8675/AD8677.
The newer parts have spice models which can be found…
20V / 65536 = 305 MICROVolts?? Not millivolts?? Do you mean microvolts all the way though your reply?
Is this measured at the output of the AD620 or the second OP177??
Is your "16bit A/D module" a monolithic IC or truly a module??
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.