TS3002ITD822T datasheet(9/13 Pages) SILABS

Nome de Peças	TS3002ITD822T

Descrição Electrónicos	Easy-to-Use Silicon Oscillator/Timer

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Fabricante Electrônico	SILABS [Silicon Laboratories]

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TS3002

TS3002 Rev. 1.0

Page 9

BLOCK DIAGRAM

THEORY OF OPERATION

The TS3002 is a user-programmable oscillator where

the period of the square wave at its FOUT terminal is

generated by an external resistor and capacitor pair.

The output frequency is given by:

FOUT (kHz) =

1

tFOUT (µs)

1E6

k

∙ R

SET MΩ x CSET(pF)

where the scalar k is approximately 1.19. With an

RSET = 4.32M

Ω and a CSET = 7.9pF, the output

frequency is approximately 25kHz with a 50% duty

cycle. As design aids, Tables 1 lists TS3002’s typical

FOUT for various standard values for RSET with

CSET = 7.9pF and Table 2 lists typical FOUT for

various standard values for CSET with RSET = 4.32M

Ω.

The TS3002 also provides a separate PWM output

Table 1: FOUT vs RSET, CSET = 7.9pF

RSET (M

Ω) FOUT (kHz)

1

106

2.49

43

4.32

25

6.81

16

9.76

11

Table 2: FOUT vs CSET, RSET = 4.32M

Ω

CSET (pF)

FOUT (kHz)

5

39

7.9

25

10

19

15

13

20

10

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TS3002ITD822T Folha de dados(PDF) 9 Page - Silicon Laboratories

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