Advertisement
Figure A illustrates use of the Analog Switch. The 0–to–5 V
Digital Control signal is used to directly control a 5 V p–p ana-
log signal.
The digital control logic levels are determined by V DD and
V SS . The V DD voltage is the logic high voltage; the V SS volt-
age is logic low. For the example, V DD = + 5 V logic high at
the control inputs; V SS = GND = 0 V logic low.
The maximum analog signal level is determined by V DD
and V SS . The analog voltage must not swing higher than
V DD or lower than V SS .
5 V p–p
+ 5 V
ANALOG SIGNAL
EXTERNAL
0–TO–5 V DIGITAL
CMOS
DIGITAL
CONTROL SIGNALS
CIRCUITRY
MOTOROLA CMOS LOGIC DATA
APPLICATIONS INFORMATION
+ 5 V
V DD
V SS
SWITCH
IN
SWITCH
OUT
MC14016B
Figure A. Application Example
V DD
D x
SWITCH
IN
D x
V SS
Figure B. External Germanium or Schottky Clipping Diodes
The example shows a 5 V p–p signal which allows no
margin at either peak. If voltage transients above V DD and/or
below V SS are anticipated on the analog channels, external
diodes (D x ) are recommended as shown in Figure B. These
diodes should be small signal types able to absorb the
maximum anticipated current surges during clipping.
The absolute maximum potential difference between V DD
and V SS is 18.0 V. Most parameters are specified up to 15 V
which is the recommended maximum difference between
V DD and V SS .
5 V p–p
ANALOG SIGNAL
V DD
D x
SWITCH
OUT
D x
V SS
+ 5.0 V
+ 2.5 V
GND
MC14016B
6–53
Advertisement
