ISL54206A_1010 Datasheet, PDF (8/20 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling

ISL54206A
Test Circuits and Waveforms (Continued)
VDD
C
VDD
C
IMPEDANCE
ANALYZER
CTRL
AUDIO OR USB
IN
COMx
GND
0V or
VDD
Repeat test for all switches.
FIGURE 5. CAPACITANCE TEST CIRCUIT
SIGNAL
GENERATOR
0V
CTRL
L OR R
COMx
IN
32Ω
ANALYZER
COMx
R OR L
NC
GND
RL
Signal direction through switch is reversed, worst case values
are recorded. Repeat test for all switches.
FIGURE 6. AUDIO CROSSTALK TEST CIRCUIT
tri
VDD
C
DIN+
DIN-
OUT+
OUT-
10%
90%
50%
tskew_i
90%
50%
10%
tfi
tro
10%
90%
90%
50%
tskew_o
50%
tf0 ^10%
VDD
DIN+
15.8Ω
143Ω
DIN-
15.8Ω
143Ω
CTRL
IN
COM+
COM-
D+
OUT+
CL ^45Ω
D-
OUT-
CL ^45Ω
GND
|tro - tri| Delay Due to Switch for Rising Input and Rising Outpu
|tfo - tfi| Delay Due to Switch for Falling Input and Falling Outpu
|tskew_0| Change in Skew through the Switch for Output Signa
|tskew_i| Change in Skew through the Switch for Input Signals
FIGURE 7A. MEASUREMENT POINTS
FIGURE 7. SKEW TEST
FIGURE 7B. TEST CIRCUIT
8
FN6515.3
October 28, 2010