54405IVZ View Datasheet(PDF) - Intersil
Part Name
Description
Manufacturer
54405IVZ Datasheet PDF : 19 Pages
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ISL54405
Sound Card AC Coupled Application Block Diagrams
FLOAT 3.3V
LOGIC
µCONTROLLER
L
AUDIO
CODEC
R
DIR_SEL
AC/DC
MUTE
SEL
L
5V_Supply VDD
ISL54405
LOGIC
AND
CLICK/POP
CONTROL
R
GND
CAP_SS
SOFT-START
CAPACITOR
0.1µF
L1
L1
FRONT PANEL
L2
LINE OUT
R1
OR
HEAD-PHONE
R1
JACK
R2
L2
BACK PANEL
LINE OUT
R2
OR
HEAD-PHONE
JACK
LOGIC
µCONTROLLER
FRONT PANEL
L
LINE OUT
OR
HEAD-PHONE
JACK
R
FLOAT 3.3V
DIR_SEL
AC/DC
MUTE
SEL
L
5V_Supply VDD
ISL54405
LOGIC
AND
CLICK/POP
CONTROL
R
GND
CAP_SS
SOFT-START
CAPACITOR
0.1µF
L1
L1
L2
R1
R1
R2
L2
R2
AUDIO
CODEC
AUDIO
CODEC
Detailed Description
The ISL54405 is a single supply, bi-directional, dual single
pole/double throw (SPDT) ultra low distortion, high
off-isolation analog switch. It was designed to operate from
either a 3.3V or 5V single supply. When operated with a 3.3V
or 5V single supply, the switches can accommodate
±2.83VPEAK (2VRMS) ground reference analog signals. The
switch rON flatness across this range is extremely small
resulting in excellent THD+N performance (0.0006% with
20kΩ load and 0.0014% with 32Ω load at 707mVRMS). The
T-Type configuration of the switch cells prevents signals
from getting through to the output when a switch is in the
OFF-state providing for superior mute performance
(>120dB) in audio applications.
8
The ISL54405 has special circuitry to eliminate click and
pops in the speakers during power-up and power-down of
the audio CODEC drivers, during removal and insertion of
headphones, and while switching between sources and
loads.
The ISL54405 was designed primarily for consumer and
professional audio switching applications such as computer
sound cards and home theater products. The “Application
Block Diagrams” on this page show two typical sound card
applications. In the upper block diagram the ISL54405 is being
used to route a single stereo source to either the front or back
panel line outs of the computer sound card. In the lower block
diagram the ISL54405 is being used to multiplex two stereo
sources to a single line out of the computer sound card.
FN6699.1
June 5, 2008
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