D
Dave Boland
Guest
In the past I have used a couple of Schottky diodes to protect the ADC
inputs. Now I see that most ADC's have this built-in. So my first
question is how effective are they for over-voltage protection, and
should I plan on adding external diodes or a Transorb diode pair (or a
MOV, but I believe they are slow and leaky)?
Another need that my come up is isolation from devices that may be part
of another system (with own power supply, ground reference, etc). How
is this done with commercial DVM's that run off line power and can
safely measure the voltages (single ended and differential) from another
system? I have seen references in this NG to galvanic isolation and
optical isolation, but have no experience with either. Any insight will
be appreciated.
Thanks,
Dave
inputs. Now I see that most ADC's have this built-in. So my first
question is how effective are they for over-voltage protection, and
should I plan on adding external diodes or a Transorb diode pair (or a
MOV, but I believe they are slow and leaky)?
Another need that my come up is isolation from devices that may be part
of another system (with own power supply, ground reference, etc). How
is this done with commercial DVM's that run off line power and can
safely measure the voltages (single ended and differential) from another
system? I have seen references in this NG to galvanic isolation and
optical isolation, but have no experience with either. Any insight will
be appreciated.
Thanks,
Dave