ISL54400, ISL54401, ISL54402
a 2k鈩?鹵5% pull-up resistor at the D- line in order to meet the
USB connect and disconnect timing requirements.
When logic pin IN1 (pin 10) is LOW the NC1 audio switch is
ON and the NO1 USB data switch is OFF. When logic pin
IN1 (pin 10) is HIGH the NC1 audio switch is OFF and the
NO1 USB data switch is ON.
When logic pin IN2 (pin 2) is LOW the NC2 audio switch is
ON and the NO2 USB data switch is OFF. When logic pin
IN2 (pin 2) is HIGH the NC2 audio switch is OFF and the
NO2 USB data switch is ON.
Power for the ISL54402 device is always provided by the DC
voltage source connected at the V
DD
pin (pin 1). The V
DD
power supply voltage range is from 1.8V to 5.5V.
ISL54402 Operation
The ISL54402 is an audio/data switch. Its logic control is
typical of a standard dual SPDT switch.
The digital control for the ISL54402 are the IN pins (pin 2
and pin 10). These pins are 1.8V logic compatible when
operated with a 3.0V supply. The device has been designed
to have low I
DD
current even when the logic voltage is not at
the rail. With V
DD
= 5.5V and VIN = 2.85V the ISL54402
draws only 8碌A(chǔ) current.
Typical Performance Curves
T
A
= 25擄C, Unless Otherwise Specified
0.015
R
LOAD
= 32鈩?/div>
V
LOAD
= 0.6V
RMS
10
RL = 32鈩?/div>
FREQ = 1kHz
1
0.01
THD+N (%)
THD+N (%)
V
DD
= 2.5V
0.1
0.005
0.01
V
DD
= 3V
0
20
0.001
200
2k
FREQUENCY (Hz)
20k
0
10
20
30
40
50
60
70
OUTPUT POWER (mW)
FIGURE 8. THD+N vs FREQUENCY
FIGURE 9. THD+N vs POWER
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
GND (TDFN Paddle Connection: Tie to GND or Float)
NORMALIZED GAIN (dB)
TRANSISTOR COUNT:
1
GAIN
0
AUDIO
-1
USB
-2
-3
-4
R
L
= 50鈩?/div>
V
IN
= 0.2V
P-P
to 2V
P-P
1M
10M
100M
FREQUENCY (Hz)
1G
98
PROCESS:
Submicron CMOS
FIGURE 10. FREQUENCY RESPONSE
12
FN6240.3
July 12, 2006
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