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PDF ISL54208 Data sheet ( Hoja de datos )
| Número de pieza | ISL54208 | |
| Descripción | USB/CVBS/ Audio Switches | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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®
Data Sheet
December 18, 2006
ISL54208
FN6410.0
Low Voltage, Dual SPDT, USB/CVBS/
Audio Switches, with Negative Signal
Capability
The Intersil ISL54208 dual SPDT (Single Pole/Double
Throw) switches combine low distortion audio/video and
accurate USB 2.0 high speed (480Mbps) data signal
switching in the same low voltage device. When operated
with a 2.7V to 3.6V single supply these analog switches
allow audio/video signal swings below-ground, allowing the
use of a common USB and audio/video connector in digital
cameras, camcorders and other portable battery powered
Personal Media Player devices.
The ISL54208 logic control pins are 1.8V logic compatible
which allows control via a standard μcontroller. With a VDD
voltage in the range of 2.7V to 3.6V the IN pin voltage can
exceed the VDD rail allowing for the USB 5V VBUS voltage
from a computer to directly drive the IN pin to switch
between the audio/video and USB signal sources in the
portable device. The part has an enable control pin to open
all the switches and put the part in a low power state.
The ISL54208 is available in a small 10 Ld 2.1mmx1.6mm
ultra-thin μTQFN package and a 10 Ld 3mmx3mm TDFN
package. It operates over a temperature range of -40 to
+85°C.
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Application Note AN557 “Recommended Test Procedures
for Analog Switches”
Application Block Diagram
Features
• High Speed (480Mbps) Signaling Capability per USB 2.0
• Low Distortion Negative Signal Capability
• Control Pin to Open all Switches and Enter Low Power
State
• Low Distortion Mono Audio Signal
- THD+N at 20mW into 32Ω Load . . . . . . . . . . . . . <0.1%
• Low Distortion Color Video Signal
- Differential Gain . . . . . . . . . . . . . . . . . . . . . . . . . . 0.28%
- Differential Phase. . . . . . . . . . . . . . . . . . . . . . . . . . 0.04°
• Cross-talk NCx Channels (4MHz) . . . . . . . . . . . . . . -78dB
• Single Supply Operation (VDD) . . . . . . . . . . . . 1.8V to 5.5V
• -3dB Bandwidth USB NOx Switches . . . . . . . . . . . 630MHz
• Available in μTQFN and TDFN Packages
• Pb-Free Plus Anneal (RoHS Compliant)
• Compliant with USB 2.0 Short Circuit Requirements
Without Additional External Components
Applications
• Digital Camera and Camcorders
• Video MP3 and other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
• Audio/Video/USB Switching
VBUS
IN
COM1
VDD
ISL54208
LOGIC CIRCUITRY
4MΩ
CTRL
NO1
NO2
COM2
50kΩ NC1
NC2
50kΩ
GND
μCONTROLLER
D- USB
HIGH-SPEED
D+ TRANSCEIVER
NTSC or PAL
VIDEO
AUDIO
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL54208
Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.3V, GND = 0V, VINH = 1.4V, VINL = 0.5V, VCTRLH = 1.4V,
VCTRLL = 0.5V, (Notes 4, 6), unless otherwise specified. (Continued)
PARAMETER
TEST CONDITIONS
TEMP (NOTE 5)
(NOTE 5)
(°C) MIN
TYP MAX UNITS
Input Current, ICTRLH
VDD = 3.6V, IN = 0V, CTRL = 3.6V
Full -2 1.1 2 μA
CTRL Pull-Down Resistor, RCTRL VDD = 3.6V, IN = 0V, CTRL = 3.6V
Full - 4 - MΩ
NOTES:
4. VLOGIC = Input voltage to perform proper function.
5. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
6. Parameters with limits are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and correlation.
7. Flatness is defined as the difference between maximum and minimum value of on-resistance over the specified analog signal range.
8. RON matching between channels is calculated by subtracting the channel with the highest max RON value from the channel with lowest max
RON value, between NC1 and NC2 or between NO1 and NO2.
Test Circuits and Waveforms
LOGIC
INPUT
VDD
0V
50%
tOFF
tr <20ns
tf <20ns
SWITCH
INPUT
VINPUT
SWITCH
OUTPUT 0V
VOUT
90%
tON
90%
Logic input waveform is inverted for switches that have the opposite
logic sense.
VDD
C
VINPUT
SWITCH
INPUT
CTRL
NO or NC
IN
VIN GND
COMx
VOUT
RL CL
50Ω 10pF
Repeat test for all switches. CL includes fixture and stray
capacitance.
VOUT
=
V (INPUT)
------------R-----L-------------
RL + R(ON)
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1. SWITCHING TIMES
FIGURE 1B. TEST CIRCUIT
LOGIC
INPUT
VDD
0V
SWITCH
OUTPUT
VOUT
0V
VDD C
CTRL
90%
VINPUT
NOx
NCx
IN
COMx
VOUT
RL CL
50Ω 10pF
VIN GND
tD
FIGURE 2A. MEASUREMENT POINTS
Repeat test for all switches. CL includes fixture and stray
capacitance.
FIGURE 2B. TEST CIRCUIT
FIGURE 2. BREAK-BEFORE-MAKE TIME
5 FN6410.0
December 18, 2006
5 Page 
ISL54208
EXTERNAL SERIES RESISTOR AT IN LOGIC CONTROL
PIN
The ISL54208 contains a clamp circuit between IN and VDD.
Whenever the IN voltage is greater than the VDD voltage by
more than 2.55V, current will flow through this clamp circuitry
into the VDD power supply bus.
During normal USB operation, VDD is in the range of 2.7V to
3.6V and IN (VBUS voltage from computer or USB hub) is in
the range of 4.4V to 5.25V, the clamp circuit is not active and
no current will flow through the clamp into the VDD supply.
In a USB application, the situation can exist where the VBUS
voltage from the computer could be applied at the IN pin
before the VDD voltage is up to its normal operating voltage
range and current will flow through the clamp into the VDD
power supply bus. This current could be quite high when
VDD is OFF or at 0V and could potentially damage other
components connected in the circuit. In the application
circuit, a 22kΩ resistor has been put in series with the IN pin
to limit the current to a safe level during this situation.
It is recommended that a current limiting resistor in the range
of 10kΩ to 50kΩ be connected in series with the IN pin. It will
have minimal impact on the logic level at the IN pin during
normal USB operation and protect the circuit during the time
VBUS is present before VDD is up to its normal operating
voltage.
Note: No external resistor is required in applications where
IN pin voltage will not exceed VDD by more than 2.55V.
Typical Performance Curves TA = +25°C, Unless Otherwise Specified
0.11 0.4
RLOAD = 32Ω
0.1 VLOAD = 0.707VRMS
RLOAD = 32Ω
VDD = 3V
0.09
VDD = 2.6V
0.3
3VP-P
0.08
0.07
0.06
0.05
VDD = 2.7V
VDD = 3V
VDD = 3.6V
0.2
0.1
2.5VP-P
2VP-P
0.04
20
200 2K
FREQUENCY (Hz)
20K
FIGURE 10. THD+N vs SUPPLY VOLTAGE vs FREQUENCY
1VP-P
0
20 200
2K 20K
FREQUENCY (Hz)
FIGURE 11. THD+N vs SIGNAL LEVELS vs FREQUENCY
0.5
RLOAD = 32Ω
FREQ = 1kHz
0.4 VDD = 3V
0.3
0.2
0.1
0
0 0.5 1 1.5 2 2.5 3
OUTPUT VOLTAGE (VP-P)
FIGURE 12. THD+N vs OUTPUT VOLTAGE
3.5
11
0.5
RLOAD = 32Ω
FREQ = 1kHz
VDD = 3V
0.4
0.3
0.2
0.1
0
0 10 20 30 40
OUTPUT POWER (mW)
FIGURE 13. THD+N vs OUTPUT POWER
50
FN6410.0
December 18, 2006
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet ISL54208.PDF ] | |
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