ISL54405_14 Datasheet, PDF (1/20 Pages) Intersil Corporation – CD/MP3 Quality Stereo 2:1 Multiplexer with Click and Pop Elimination

CD/MP3 Quality Stereo 2:1 Multiplexer with Click and
Pop Elimination
ISL54405
The Intersil ISL54405 is a single supply, bidirectional, dual
single-pole/double-throw (SPDT) ultra low distortion, high
OFF-Isolation analog switch that can pass analog signals that
are positive and negative with respect to ground. It is primarily
targeted at consumer and professional audio switching
applications such as computer sound cards and home theater
products. The inputs can accommodate ground referenced
signals up to 2V_RMS while operating from a single 3.3V or 5V DC
supply. The digital logic inputs are 1.8V logic-compatible when
using a single 3.3V or 5V supply. It can be used in both AC or DC
coupled ground referenced applications.
The ISL54405 features a soft-switch feature and click/pop
circuitry at each signal pin that eliminates clicks and pops
associated with power-up/down conditions of the preceding
amplifier outputs.
With -106dB THD+N performance with a 2V_RMS signal into
20k load, superior signal muting, high PSRR and very flat
frequency response, the ISL54405 meets the exacting
requirements of consumer and professional audio engineers.
The ISL54405 is available in 16 Ld TSSOP, 16 Ld 3mmx3mm
TQFN, and 16 Ld 2.6mmx1.8mm µTQFN packages. It’s specified
for operation over the -40°C to +85°C temperature range.
Related Literature
• TB363 “Guidelines for Handling and Processing Moisture
Sensitive Surface Mount Devices (SMDs)”
• AN557 “Recommended Test Procedures for Analog
Switches”
Features
• Clickless audio switching
• 2 switches
• Switch type SPDT or 2 to 1 MUX
• 2V_RMS signal switching from 3.3V or 5V supply
• -106dB THD+N into 20k load at 2V_RMS
• -108dB THD+N into 32 load at 3.9mW
• Signal to noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >124dBV
• ±0.01dB insertion loss at 1kHz, 20k load
• ±0.007dB gain variation 20Hz to 20kHz
• 125dB signal muting into 20k load
• 90dB PSRR 20Hz to 20kHz
• Single supply operation . . . . . . . . . . . . . . . . . . . . . . . . . 3.3V or 5V
• Available in 16 Ld TSSOP, 16 Ld TQFN, and 16 Ld µTQFN
• Pb-Free (RoHS compliant)
Applications
• Computer sound cards
• Home theater audio products
• SACD/DVD audio
• DVD player audio output switching
• Headsets for MP3/cellphone switching
• Hi-Fi audio switching application
DIR_SEL
AC/DC
MUTE
SEL
L
R
5V_Supply
ISL54405
LOGIC
AND
CLICK/POP
CONTROL
VDD
CAP_SS
L1
L2
R1
R2
May 6, 2014
FN6699.2
GND
For 5V operation connect the 5V_Supply pin to 5V and float the
VDD pin. For 3.3V operation connect the VDD pin to 3.3V and float
the 5V_Supply pin.
FIGURE 1. ISL54405 BLOCK DIAGRAM
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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