ESDALC6V1W5 datasheet(6/9 Pages) STMICROELECTRONICS

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ESDALC6V1W5

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CROSSTALK BEHAVIOR

RL1

RL2

αβ

1G1

12G2

V+

αβ

2G2

21G1

V+

Line 1

Line 2

VG1

VG2

DRIVERS

RECEIVERS

RG1

RG2

Fig. A5: Crosstalk phenomenon

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 k

Ω)

RF TEST BOARD

I/O4

I/O1

To Port2

To Port1

TEST BOARD

I/O4

I/O1

To Port2

To Port1

Fig. A6: Analog crosstalk measurements

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