Understanding pulse width distortion and minimum pulse width requirement

Hello Neil

Thank you for your reply. You mentioned that you collected a lot of data regarding supply voltage/working temp/different channels. That's exactly what interests me, is the maximum pwd just a cornercase that can occur e.g. at highest temperature, lowest supply voltage and low impedance load in a certain percentage of chips?

First I thought that possibly the max pwd could be ruled out since we only plan to use the isolator between 20°C - 60°C, (feeding a high-impedance load). At least that was the case with the isolator from an other company that we are currently using. Its pwd strongly increases with temperature. I'm not sure whether this is the case for the ADuM262N. According to the datasheet, the typical change in temperature is only 1.5ps/°C but on the other hand, the typical pwd is also only 0.7ns.

If you do have any data for a reduced temperature range of e.g. 20°C - 60°C, I would really appreciate it. Most interesting would be max( t_plh - t_phl ) and min( t_phl - t_plh ). If the pwd is for example always positive, we could apply duty cycle correction.

Best regards

hans

Hello Neil

Thank you for your reply. You mentioned that you collected a lot of data regarding supply voltage/working temp/different channels. That's exactly what interests me, is the maximum pwd just a cornercase that can occur e.g. at highest temperature, lowest supply voltage and low impedance load in a certain percentage of chips?

First I thought that possibly the max pwd could be ruled out since we only plan to use the isolator between 20°C - 60°C, (feeding a high-impedance load). At least that was the case with the isolator from an other company that we are currently using. Its pwd strongly increases with temperature. I'm not sure whether this is the case for the ADuM262N. According to the datasheet, the typical change in temperature is only 1.5ps/°C but on the other hand, the typical pwd is also only 0.7ns.

If you do have any data for a reduced temperature range of e.g. 20°C - 60°C, I would really appreciate it. Most interesting would be max( t_plh - t_phl ) and min( t_phl - t_plh ). If the pwd is for example always positive, we could apply duty cycle correction.

Best regards

hans