DALC208 datasheet(7/10 Pages) STMICROELECTRONICS

7 / 10 page

100

1,000

-100

-80

-60

-40

-20

f(MHz)

dBm

Fig. A8: Analog crosstalk results.

3- Analog Crosstalk

Figure A7 gives the measurement circuit for the

analog application. In usual frequency range of

analog signals (up to 100MHz) the effect on

disturbed line is less than -45 dBm (please see Fig.

A8).

Fig. A7: Analog crosstalk measurements.

SPECTRUM ANALYSER

Vout

Ω

TRACKING GENERATOR

Vin

Ω

TEST BOARD

+5V

DALC

208

C=100nF

Fig. A9: Measurement conditions.

As the DALC208SC6 is designed to protect high

speed data lines, it must ensure a good

transmission of operating signals. The attenuation

curve give such an information.

Fig. A10 shows that the DALC208SC6 is well

suitable for data line transmission up to 100 Mbit/s

while it works as a filter for undesirable signals as

GSM (900MHz).

100

1,000

-30

-20

-10

f(MHz)

dBm

Fig. A10: DALC206SC6 attenuation.

SPECTRUM ANALYSER

Vout

Ω

TRACKING GENERATOR

Vin

Ω

TEST BOARD

+5V

DALC

208

C=100nF

DALC208SC6

7/10

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