ISL54233 Datasheet, PDF (7/18 Pages) Intersil Corporation – Wideband Differential 3:1 Multiplexer

ISL54233
Test Circuits and Waveforms (Continued)
V_DD
C
SIGNAL
GENERATOR
CTRL
xD-
COMx
50Ω
V_Cx
0V OR FLOAT
ANALYZER
50Ω
COMx
xD+
GND
N.C.
FIGURE 7. CROSSTALK TEST CIRCUIT
DIN+
DIN-
OUT+
OUT-
t_ri
10%
90%
90%
50%
t_{skew_i}
50%
10%
t_fi
t_ro
90%
10%
90%
50%
t_{skew_o}
50%
t_f0
10%
FIGURE 8A. MEASUREMENT POINTS
V_{DD C}
0V
V_DD
DIN+
15.8Ω
143Ω
DIN-
15.8Ω
143Ω
C0 ^VDD
C1
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 8B. TEST CIRCUIT
FIGURE 8. SKEW TEST
7
FN7918.0
December 21, 2011