MC74HC4046ADTR2 Ver la hoja de datos (PDF) - ON Semiconductor

Número de pieza

componentes Descripción

Fabricante

MC74HC4046ADTR2

Phase-Locked Loop

ON Semiconductor 

MC74HC4046A

APPLICATION INFORMATION

The following information is a guide for approximate values of R1, R2, and C1. Figures 20, 21, and 22 should be used as

references as indicated below, also the values of R1, R2, and C1 should not violate the Maximum values indicated in the DC

ELECTRICAL CHARACTERISTICS tables.

Phase Comparator 1

R2 = ∞

• Given f0

• Use f0 with

Figure 19 to

determine R1 and

C1.

(see Figure 24 for

characteristics of

the VCO operation)

R2 0 R

• Given f0 and fL

• Calculate fmin

fmin = f0−fL

• Determine values

of C1 and R2 from

Figure 21.

• Determine R1−C1

from Figure 22.

• Calculate value of

R1 from the value

of C1 and the

product of R1C1

from Figure 22.

(see Figure 25 for

characteristics of

the VCO operation)

Phase Comparator 2

R2 = ∞

• Given fmax and f0

• Determine the

value of R1 and

C1 using Figure

20 and use Figure

22 to obtain 2fL

and then use this

to calculate fmin.

R2 0 R

• Given f0 and fL

• Calculate fmin

fmin = f0−fL

• Determine values

of C1 and R2 from

Figure 21.

• Determine R1−C1

from Figure 22.

• Calculate value of

R1 from the value

of C1 and the

product of R1C1

from Figure 22.

(see Figure 25 for

characteristics of

the VCO operation)

Phase Comparator 3

R2 = ∞

• Given fmax and f0

• Determine the

value of R1 and

C1 using Figure

20 and Figure 22

to obtain 2fL and

then use this to

calculate fmin.

R2 0 R

• Given f0 and fL

• Calculate fmin:

fmin = f0−fL

• Determine values

of C1 and R2 from

Figure 21.

• Determine R1−C1

from Figure 22.

• Calculate value of

R1 from the value

of C1 and the

product of R1C1

from Figure 22.

(see Figure 25 for

characteristics of

the VCO operation)

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