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| ISL54409_10 Datasheet, PDF (7/13 Pages) Intersil Corporation – Audio/USB 2.0 Wired-OR Switch with Click and Pop Reduction | |||
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ISL54409, ISL54410
Test Circuits and Waveforms
VCTRL
LOGIC
INPUT
VCTRL
SWITCH
INPUT
VINPUT
SWITCH
OUTPUT 0V
50%
tOFF
VOUT
90%
tON
tr < 20ns
tf < 20ns
90%
VDD
0.1µF
VLIN/RIN
VCTRL
IN
VDD
CTRL
GND
VCOM-/COM+
RL
50Ω
CL
10pF
*CL includes board capacitance
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1B. TEST CIRCUIT
FIGURE 1. SWITCHING TIMES
Repeat test for all switches.
rON = V1/40mA
VDD
0.1µF
VDD
0.1µF
VIN
V1
40mA
IN
VDD
LIN OR RIN
VDD
COM- OR
COM+
GND
CTRL
IN
LIN OR RIN
COM- OR
COM+
RL
CTRL
0V OR
FLOAT
GND
FIGURE 2. rON TEST CIRCUIT
FIGURE 3. OFF ISOLATION CIRCUIT
VDD
0.1µF
CTRL
COM- OR
COM+
LIN OR
RIN
IN
0V OR
FLOAT
COM+ OR
COM-
RIN OR
LIN
RL
GND
FIGURE 4. CROSSTALK TEST CIRCUIT
7
FN6983.1
January 14, 2010
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