Other Parts Discussed in Thread: OPA548
Hello,
I realized a 4Vrms 1.2kHz sinus by using an OPA547 (supplied in +/-15Vdc) with a gain of 3.
I have set the current limit to approximately 350mA by adding a 37k4 resistor between pin 3 and 4.
But when I test the current limitation by putting the output in short circuit, I have the following behavior:
- When the sinus goes to negative voltage, current is limited to -350mA (functioning is OK)
- When the sinus goes to positive voltage, current ripples between 0 and 750mA at a 1MHz frequency
I have test the same function by injecting a positive or negative dc voltage and I have the same behavior
Is it normal?