ESDA14V2-4BF1 查看數據表（PDF） - STMicroelectronics
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ESDA14V2-4BF1 Datasheet PDF : 9 Pages
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ESDA14V2-4BF1
2. Crosstalk behavior
Fig. A5: Crosstalk phenomenon.
RG1
VG1
RG2
VG2
Line 1
Line 2
RL1
α1VG1 + β12VG2
RL2
α2VG2 + β21VG1
DRIVERS
RECEIVERS
The crosstalk phenomena are due to the coupling between 2 lines. Coupling factors ( β12 or β21 ) increase
when the gap across lines decreases, particularly in silicon dice. In the example above, the expected
signal on load RL2 is α2VG2, in fact the real voltage at this point has got an extra value β21VG2. This part
of the VG1 signal represents the effect of the crosstalk phenomenon of the line 1 on the line 2. This
phenomenon has to be taken into account when the drivers impose fast digital data or high frequency
analog signals. The perturbed line will be more affected if it works with low voltage signal or high load
impedance (few kΩ).
Fig. A6: Analog crosstalk test configuration.
Fig. A7: Typical analog crosstalk response.
Connected to the port1
of the Network Analyser
TEST BOARD
A1
EB14
15
C3
Connected to the port2
of the Network Analyser
Typical crosstalk response of ESDA14V2-4BF1 (A1/A3 line)
0.00
-10.00
-20.00
-30.00
-40.00
-50.00
-60.00
-70.00
-80.00
-90.00
-100.0
100.0k
1.0M
10.0M f/Hz 100.0M
1.0G
Figure A6 gives the measurement circuit for the analog crosstalk application. In figure A7, the curve shows
the effect of the line A1on the line A3. In usual frequency range of analog signals (up to 100 MHz) the
effect on disturbed line is less than -30dB.
6/9
®
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