MC74VHC4316 Datasheet, PDF (9/12 Pages) ON Semiconductor – Quad Analog Switch/Multiplexer/Demultiplexer with Separate Analog and Digital Power Supplies

MC74VHC4316
APPLICATIONS INFORMATION
0
-ā10
FUNDAMENTAL FREQUENCY
-ā20
-ā30
-ā40
-ā50
-ā60
-ā70
-ā80
-ā90
-ā100
1.0
DEVICE
SOURCE
2.0
3.0
FREQUENCY (kHz)
Figure 14. Plot, Harmonic Distortion
The Enable and Control pins should be at V_CC or GND
logic levels, V_CC being recognized as logic high and GND
being recognized as a logic low. Unused analog
inputs/outputs may be left floating (not connected).
However, it is advisable to tie unused analog inputs and
outputs to V_CC or V_EE through a low value resistor. This
minimizes crosstalk and feedthrough noise that may be
picked up by the unused I/O pins.
The maximum analog voltage swings are determined by
the supply voltages V_CC and V_EE. The positive peak analog
voltage should not exceed V_CC. Similarly, the negative peak
analog voltage should not go below V_EE. In the example
below, the difference between V_CC and V_EE is 12 V.
Therefore, using the configuration in Figure 15, a maximum
analog signal of twelve volts peak-to-peak can be
controlled.
When voltage transients above V_CC and/or below V_EE are
anticipated on the analog channels, external diodes (Dx) are
recommended as shown in Figure 16. These diodes should
be small signal, fast turn-on types able to absorb the
maximum anticipated current surges during clipping. An
alternate method would be to replace the Dx diodes with
MOSORBs (MOSORBt is an acronym for high current
surge protectors). MOSORBs are fast turn-on devices
ideally suited for precise dc protection with no inherent wear
out mechanism.
+6V
-ā6 V
V_CC = 6 V
ANALOG I/O
16
ANALOG O/I
+6V
ON
-ā6 V
+6V
-ā6 V
SELECTED
CONTROL
INPUT
V_EE
8
ENABLE CONTROL
INPUTS
(V_CC OR GND)
Figure 15.
V_CC
D_x
16
D_x
V_CC
V_EE
ON
SELECTED
CONTROL
INPUT
V_EE
V_CC
D_x
D_x
V_EE
ENABLE CONTROL
INPUTS
(V_CC OR GND)
Figure 16. Transient Suppressor Application
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