-6

-4

-2

0

2

4

6

V , INPUT SIGNAL VOLTAGE (V)

IS

-6

-4

-2

0

2

4

6

V

= 5V

DD

V

= 0V

SS

V

= -5V

EE

T = 25 C

A

o

R = 100k , R = 10k

L

L

Ω

Ω

100

Ω

500

Ω

1k

Ω

CD4051B, CD4052B, CD4053B

SCHS047H – AUGUST 1998 – REVISED APRIL 2015

www.ti.com

Typical Application (continued)

9.2.2 Detailed Design Procedure

1. Recommended Input Conditions

–

For switch time specifications, see propagation delay times in Electrical Characteristics.

–

–

2. Recommended Output Conditions

–

3. Input/output current consideration: The CD405xB series of parts do not have internal current drive circuitry

and thus cannot sink or source current. Any current will be passed through the device.

9.2.3 Application Curve

Figure 29. ON Characteristics for 1 of 8 Channels

(CD4051B)

10 Power Supply Recommendations

The power supply can be any voltage between the minimum and maximum supply voltage rating located in the

Electrical Characteristics.

supply, a 0.1-

0.022-

capacitor is recommended for each supply pin. It is acceptable to parallel multiple bypass capacitors to reject

different frequencies of noise. 0.1-

μF and 1-μF capacitors are commonly used in parallel. The bypass capacitor

should be installed as close to the power terminal as possible for best results.

11 Layout

11.1 Layout Guidelines

Reflections and matching are closely related to loop antenna theory, but different enough to warrant their own

discussion. When a PCB trace turns a corner at a 90° angle, a reflection can occur. This is primarily due to the

change of width of the trace. At the apex of the turn, the trace width is increased to 1.414 times its width. This

upsets the transmission line characteristics, especially the distributed capacitance and self–inductance of the

trace — resulting in the reflection. It is a given that not all PCB traces can be straight, and so they will have to

turn corners. Figure 30 shows progressively better techniques of rounding corners. Only the last example

maintains constant trace width and minimizes reflections.

20

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