Crosstalk behavior
Note:
DALC208
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
TRACKING GENERATOR
TEST BOARD
SPECTRUM ANALYSER
50Ω
DALC
208
+5V
Vg
50Ω
Vin
C=100nF
Vout
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. Analog crosstalk results
dBm
0
-20
Figure 18. DALC208SC6 attenuation
dBm
0
-10
-40
-60
-20
-80
-100
1
10
f(MHz)
100
1,000
-30
1
10
f(MHz)
100
1,000
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.
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).
8/14
STMICROELECTRONICS [ STMICROELECTRONICS ]
