9

FN6627.4

June 10, 2010

FIGURE 5. CAPACITANCE TEST CIRCUIT

FIGURE 6. AUDIO CROSSTALK TEST CIRCUIT

FIGURE 7A. MEASUREMENT POINTS

FIGURE 7B. TEST CIRCUIT

FIGURE 7. SKEW TEST

C

GND

AUDIO OR USB

COMx

IN

IMPEDANCE

ANALYZER

Repeat test for all switches.

CTRL

0V

ANALYZER

C

L OR R

SIGNAL

GENERATOR

GND

IN

COMx

32Ω

NC

COMx

R OR L

Signal direction through switch is reversed, worst case values

are recorded. Repeat test for all switches.

CTRL

DIN+

DIN-

OUT+

OUT-

50%

50%

90%

10%

10%

10%

10%

90%

90%

50%

90%

50%

OUT+

COM-

D+

GND

C

D-

COM+

OUT-

DIN+

DIN-

|tro - tri| Delay Due to Switch for Rising Input and Rising Output Signals.

|tfo - tfi| Delay Due to Switch for Falling Input and Falling Output Signals.

|tskew_0| Change in Skew through the Switch for Output Signals.

|tskew_i| Change in Skew through the Switch for Input Signals.

15.8

Ω

15.8

Ω

143

Ω

143

Ω

45

Ω

45

Ω

CTRL

IN

ISL54209