- Ask a related questionWhat is a related question?A related question is a question created from another question. When the related question is created, it will be automatically linked to the original question.
Tool/software:
Hi,
just tried to design a current sensor monitor. I need to get an alarm, if the bidirectional current exeeds the allowed margin. Pulses were ok, rest could done in the FPGA.
To reduce the need of monitoring two levels I use a full wave rectifier. The level is trimmed manually. (Scientific instrument, no mass production).
Any suggestens to make this circuit better?
Is a TINA model for the OP328 available, because this could be the better choice than the OPA350?
Thanks for revieewing the circuit.
With beest regards
Gerhard
H Gerhard,
Your circuit looks good. OPA328 model is available - I included it in the simulation below. I also added a compensation cap across the feedback resistor.
Hi Gerhard,
The macro-models may be found under each product folder:
Yes, there is a convergence issue with one of the OPA328 - I reported the problem to our modeling team. Thus, in the meantime, please use the circuit as I sent it to you. After the issue is resolved, in the final schematic you will on use only OPA328.
Hi Gerhard,
Sometimes the default parameters need to be change to help simulator to converge. Please change the Shunt conductance from zero to 1p - see below.
By doing so the simulator found the convergence point and the transient simulation successfully completed - see below.
