I am considering using the zero crossing circuit described in the Application Note "Zero crossing detection using comparator circuit" (SNOA999) http://www.ti.com/lit/an/snoa999/snoa999.pdf
The author states in regards to the Zener Diode to be used, that it should have "a voltage rating of 0.3V". Does this refer to the breakdown voltage?
Could anyone provide an example of a suitable zender diode for this purpose?
thanks in advance for any hints