Data Sheet ADG333A
Rev. B | Page 11 of 13
APPLICATIONS INFORMATION
ADG333A SUPPLY VOLTAGES
The ADG333A can operate from a dual or signal supply. V
SS
should
be connected to GND when operating with a single supply.
When using a dual supply, the ADG333A can also operate with
unbalanced supplies; for example V
DD
= 20 V and V
SS
= −5 V.
The only restrictions are that V
DD
to GND must not exceed
30 V, V
SS
to GND must not drop below −30 V, and V
DD
to V
SS
must not exceed +44 V. It is important to remember that the
ADG333A supply voltage directly affects the input signal range,
the switch on resistance and the switching times of the device.
The effects of the power supplies on these characteristics can be
clearly seen from the Typical Performance Characteristics curves.
POWER SUPPLY SEQUENCING
When using CMOS devices, care must be taken to ensure
correct power-supply sequencing. Incorrect power-supply
sequencing can result in the device being subjected to stresses
beyond those listed in the Absolute Maximum Ratings. This is
also true for the ADG333A. Always turn on V
DD
first, followed
by V
SS
and the logic signals. An external signal within the maxi-
mum specified ratings can then be safely presented to the source
or drain of the switch.
