Q
Can I use SPDT switches to generate a -40V to 0V logic signal. So he needs aunbalanced power supplies. For example Vss=-40V, Vcc=7V. However, I think it
will exceeds the power supply range of ADG5436. I am not quite sure whether
ADG5436 or any other part can support that application.
I asked the customer to do some test on it.
A
The absolute maximum ratings of this device is 48V for Vdd to Vss. This is astress rating only and is not recommended for normal operation.
The max recommended operational voltage is approx 40V (36V+10%) This is what we
guarantee in the specification tables.
In the features section on the front page we state the part operation is:
+/-9V to +/-22V dual supply
+9V to 40V single supply
We have Ron plots at Vdd = 9V and it is around this point where the internal
Vcc generator will switch off.
The only way you can reliably do this is to shift everything down:
Vdd = 0V, Vss = -40V, Gnd = -10V
Logic must be referenced to gnd so should go from -10v to -5V
