Crosstalk behavior

DALC208

8/14

Note:

The measurements have been done in the worst case i.e. on two adjacent cells (I/O1 and

I/O4).

3.3

Analog crosstalk

Figure 16.

Analog crosstalk measurements

Figure 16 shows the measurement circuit for the analog application. For the usual frequency

range of analog signals (up to 100MHz) the effect on disturbed line is less than -45 dBm.

See Figure 17.

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.

Figure 18 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 such as GSM carrier (900 MHz).

SPECTRUM ANALYSER

Vout

50

Ω

TRACKING GENERATOR

Vg

Vin

50

Ω

TEST BOARD

+5V

DALC

208

C=100nF

Figure 17.

Analog crosstalk results

Figure 18.

DALC208SC6 attenuation

1

10

100

1,000

-100

-80

-60

-40

-20

0

f(MHz)

dBm

1

10

100

1,000

-30

-20

-10

0

f(MHz)

dBm