Fig 1 AduM4135 Ringing
Hi, I'm using the Adum4135 at 20kHz with Rgon=Rgoff=4.7Ohm. I noted a ringing problem in the gate turn on(see fig1) The turn on is ringing at about 30MHz. At the beginning I thought that the problem was in my pcb layout but when I replace the AduM4135 with the ISO5451 from TI, the ringing problem disappear (see Fig. 2) I saw the datasheet and I think that the AduM4135 and ISO5451 have the same switching behavior and they are also pin compatible (at less of 180° of rotation). So, why there is this ringing problem in the AduM4135?