Tone Detector

5

MX105A PRELIMINARY INFORMATION

© 1997 MX•COM, INC.

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Doc.# 20480133.003

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3. External Components

MX105A

D1

C4

R3

R2

Signal Input

Detect Out

C6

R4

C5

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Figure 2: Recommended External Components

See Section 5.2

300k

Ω

See section 5.6

Note 2

See Section 5.2

100k

Ω

See Section 5.6

Note 2

R2

See Section 5.6

See Section 5.8

Note 2

R3

See Section 5.8

See Section 5.8

Note 2

R4

See Section 5.5

C4

See Section 5.11

Note 1, 2

Note 4

20k

Ω

±20%

C5

0.27µF

±20%

See Section 5.2

Note 2

C6

0.1µF

±20%

See Section 5.2

Note 2

D1

See Section 5.9

Note 3

small signal

diode (1N914)

External Components Notes:

1.

For improved performance, C4 may be chosen to provide 30° phase shift at the VCO loop filter input.

2.

3.

For improved de-response time, a diode (D1) may be added.

4.

given in ‘Maximum Ratings Specifications’.