ISL54211_14 Datasheet, PDF (8/19 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling/Click and Pop Suppression

ISL54211
Test Circuits and Waveforms (Continued)
AUDIO PRECISION
SYSTEM II CASCADE
ANALYZER
CHA CHB
3.3V
FLOAT
IN
V_DD
R_LOAD
COM-
COM+
R_LOAD
L
CLICK
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, Aweighted Filter, Manual Range 1X/Y, Units to dBV
FIGURE 7. CLICK AND POP TEST CIRCUIT
AUDIO PRECISION
SYSTEM II CASCADE
ANALYZER
CHA CHB
3.3V
FLOAT
C
IN
V_DD
R_LOAD
R_LOAD
COM-
COM+
L
CLICK
AND
R
POP
GND CTRL
0V TO V_DD
SQUARE WAVE
Set Audio Analyzer for Peak Detection, 32 Samples/Sec, Aweighted Filter, Manual Range 1X/Y, Units to dBV
FIGURE 8. CLICK AND POP TEST CIRCUIT
Power Supply Turn-On/Turn-Off Click and Pop Transient Test
V_DD
0V TO 3.0V
DC STEP OR
3.0V TO 0V
DC STEP
1Hz
20kΩ
20kΩ
COM-
COM+
CLICK
AND
POP
220µF
L
R
220µF
GND IN CTRL
1.5V OR 0V
FIGURE 9. CLICK AND POP TEST CIRCUIT #2
8
FN6662.1
August 25, 2008