gehan_s
Member level 3
Hi all,
I am designing a 3 phase power meter using the ade7758. To power the IC there is a transformer step down stage (See page 11 of a similar application note). There the neutral and the secondary of the transformers are shorted (both of them are named AGND). Can this be done ???? (In a way it is needed because the IC is sampling the AC voltage directly from the mains and it needs a reference point. But is it safe ??)
Secondly what is the point of having R20 to R36 for them are short circuited ???
Thanks in advance !!!!!!!!!!!!
I am designing a 3 phase power meter using the ade7758. To power the IC there is a transformer step down stage (See page 11 of a similar application note). There the neutral and the secondary of the transformers are shorted (both of them are named AGND). Can this be done ???? (In a way it is needed because the IC is sampling the AC voltage directly from the mains and it needs a reference point. But is it safe ??)
Secondly what is the point of having R20 to R36 for them are short circuited ???
Thanks in advance !!!!!!!!!!!!