MC74HC4316A

http://onsemi.com

9

APPLICATIONS INFORMATION

0

−10

−20

−30

−40

−50

− 100

1.0

2.0

FREQUENCY (kHz)

−60

−70

−80

−90

FUNDAMENTAL FREQUENCY

DEVICE

SOURCE

Figure 15. Plot, Harmonic Distortion

3.0

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

minimizes crosstalk and feedthrough noise that may be

picked up by the unused I/O pins.

The maximum analog voltage swings are determined by

Therefore, using the configuration in Figure 16, a maximum

analog signal of twelve volts peak−to−peak can be

controlled.

anticipated on the analog channels, external diodes (Dx) are

recommended as shown in Figure 17. 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 (MOSORB

t 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.

ANALOG O/I

ON

16

ANALOG I/O

+ 6 V

−6 V

+ 6 V

−6 V

ENABLE CONTROL

INPUTS

ON

16

Figure 16.

Figure 17. Transient Suppressor Application

8

SELECTED

CONTROL

INPUT

SELECTED

CONTROL

INPUT

+ 6 V

−6 V

ENABLE CONTROL

INPUTS