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| ISL54210_14 Datasheet, PDF (8/21 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling/Click and Pop Suppression | |||
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ISL54210
Test Circuits and Waveforms
VBUSH
LOGIC
INPUT
VBUSL
SWITCH
INPUT
VINPUT
SWITCH
OUTPUT 0V
50%
tOFF
VOUT
90%
tON
tr < 20ns
tf < 20ns
90%
VDD
C
VINPUT
SWITCH
INPUT
CTRL
AUDIO OR USB
VBUS
COMx
VBUS
GND
VOUT
RL
50W
CL
10pF
Logic input waveform is inverted for switches that have the opposite logic
sense.
FIGURE 1A. MEASUREMENT POINTS
Repeat test for all switches. CL includes fixture and stray
capacitance.
VOUT
=
V (INPUT)
---------R-----L---------
RL + rON
FIGURE 1B. TEST CIRCUIT
FIGURE 1. SWITCHING TIMES
VDD
C
VDD
C
rON = V1/40mA
VL OR R
CTRL
L OR R
40mA
V1
COMx
GND
VBUS VBUSL
rON = V1 / Icom
VD- OR D+
CTRL
D- OR D+
ICOM
V1
COMx
GND
VBUS VBUSH
REPEAT TEST FOR ALL SWITCHES
FIGURE 2. AUDIO rON TEST CIRCUIT
VDD
C
CTRL
AUDIO OR USB
IMPEDANCE
ANALYZER
COMx
GND
VBUS
VBUSL OR
VBUSH
REPEAT TEST FOR ALL SWITCHES
FIGURE 4. CAPACITANCE TEST CIRCUIT
8
REPEAT TEST FOR ALL SWITCHES
FIGURE 3. USB rON TEST CIRCUIT
VDD
C
SIGNAL
GENERATOR
CTRL
L OR R
COMx
32Ω
VBUS
0V OR FLOAT
ANALYZER
COMx
R OR L
NC
GND
RL
REPEAT TEST FOR ALL SWITCHES
FIGURE 5. AUDIO CROSSTALK TEST CIRCUIT
FN6661.2
March 18, 2010
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