ISL54210 Datasheet, PDF (9/21 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling/Click and Pop Suppression

ISL54210
Test Circuits and Waveforms (Continued)
V_{DD C}
t_ri
DIN+
DIN-
OUT+
OUT-
10%
90%
50%
t_{skew_i}
90% _50%
10%
t_fi
t_ro
90%
10%
90%
50%
t_{skew_o}
50%
t_f0
10%
V_BUSH
DIN+
DIN-
15.8Ω
143Ω
15.8Ω
143Ω
CTRL
V_BUS
COM+
COM-
D+
OUT+
C_L
45Ω
D-
OUT-
C_L
45Ω
GND
|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.
FIGURE 6A. MEASUREMENT POINTS
FIGURE 6. SKEW TEST
FIGURE 6B. TEST CIRCUIT
AUDIO PRECISION
SYSTEM II CASCADE
ANALYZER
CHA CHB
FLOAT
3.3V
V_BUS
V_DD
R_LOAD
R_LOAD
COM-
COM+
CLICK
L
AND
POP
R
GND _CTRL
0V TO 1.25V
DC STEP OR
1.25V TO 0V
DC STEP
SET AUDIO ANALYZER FOR PEAK DETECTION, 32 SAMPLES/SEC, A WEIGHTED FILTER, MANUAL RANGE 1X/Y, UNITS TO DBV
FIGURE 7. CLICK AND POP TEST CIRCUIT
9
FN6661.2
March 18, 2010