Evaluation Board User Guide
UG-137
One
Technology
Way
•
P.O.
Box
9106
•
Norwood,
MA
02062-9106,
U.S.A.
•
Tel:
781.329.4700
•
Fax:
781.461.3113
•
www.analog.com
Power-Off Protection ±5 V, +12 V, and +5 V Quad SPST Switches
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 8
FEATURES
Full featured evaluation board for the ADG4612
Power-off protection
Switch guaranteed off with no power supplies present
Inputs are high impedance with no power
Switch turns off if input > V
DD
+ V
T
Overvoltage protection up to 16 V
PSS robust
Negative signal capability passes signals down to −5.5 V
GENERAL DESCRIPTION
This user guide describes the evaluation board for the
ADG4612 quad SPST switches.
Figure 1 shows the EVAL-ADG4612EBZ. The 16-lead TSSOP
ADG4612 is soldered onto the center of the evaluation board and
is designated as U2.
The evaluation kit contains a fully fitted printed circuit board
(PCB). Full details about the part are available in the ADG4612
data sheet, which should be consulted when using the EVAL-
ADG4612EBZ.
When power supplies are not present, the switch remains off,
and the switch inputs are high impedance, which ensures that
current does not damage the switch. This is useful in applications
where analog signals can be present at the switch inputs before
power, or where the user has no control over the power supply
sequence.
When off, signal levels up to 16 V are blocked. In addition, if the
analog input signal levels exceed V
DD
by V
T
, the switch turns off.
EVALUATION BOARD PHOTOGRAPH
09
00
8
-00
1
Figure 1.
