Hi,
Can I use it as a power source in inverting mode where it will be control by DAC. As I know that if we use in inverting mode then oscillation are less as compare to non-inverting mode.
If so can you please suggest some application circuit, because in datasheet the configuration given is in non-inverting mode.
Thanks and Regards
Gajendra
Hi Gajendra,
The OPA547 certainly can be applied as an inverting amplifier, but I wouldn't hesitate to use it as a non-inverting amplifier. I suspect that your DAC input voltage range is something like 0 to 3.3 V, or 0 to 5.0 V, and you need a high voltage output from the OPA547. If that is the case, the OPA547 would be operating with a positive gain. The OPA547 is unity gain stable and unless you are driving an output load that is complex such as pure capacitance it is usually stable. It really comes down to the load impedance characteristics as to whether there will be stability issues, or not.
I show below the OPA547 connected as an inverting amplifier with a voltage gain of -5 V/V. I don't really know your circuit parameters so I set some reasonable operating conditions. You can see that because it is an inverting amplifier the positive 0 to 5 V input voltage, results in a large negative output voltage range.
I've included my TINA Spice file should you want to try some simulations.
Regards, Thomas
Precision Amplifiers Applications Engineering
