I have encountered a problem with the AD8318 logarithmic amplifier. We are using the AD8318 in simple measurement mode (i.e. VSET tied to VOUT). We are enabling/disabling the device via the ENABLE pin connected to a microcontroller (so driving the pin from 0V to 3.3V). In some devices, when the device is enabled, the output of the AD8318 goes into oscillation (see attached screenshot from oscilloscope).
I have done some investigation, and found the following:
Does anyone have any ideas what is causing this problem, or have seen anything like it?
Thanks in advance
Hi Will, what do you mean of the description "high power signals cause a strange waveform on the output of the log amp." ? Is your application of AD8318 is for partial discharge detector? How about the AD8318 usage now?