FX829P4 datasheet(7/34 Pages) CMLMICRO

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Baseband Signal Processor

FX829

D/829/4

1.4

External Components

22pF

±20%

±5%

4.032MHz

±100ppm

22pF

±20%

Note 1

±10%

68pF

±20%

Note 1

±10%

0.1µF

±20%

100k

±10%

0.1µF

±10%

100k

±10%

100pF

±20%

Note 2

±10%

0.1µF

±20%

22k

±10%

Note 2

±20%

5.6nF

±20%

Notes:

R2, R3, R4 and C3 form the gain components for the Summing Amplifier (AMP2).

R2 and R3 should be chosen as required from the system specification, using the

following formulae:

Audio Gain =

−

DTMF Gain =

−

R5, R6, C6 and C8 form the gain components for the Rx Input Amplifier (AMP1).

R6 should be chosen as required by the signal level, using the following formula:

Gain

−

C8 x R6 should be chosen so as not to compromise the low frequency performance of

this product.

Figure 2 Recommended External Components

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