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PDF ISL54210 Data sheet ( Hoja de datos )
| Número de pieza | ISL54210 | |
| Descripción | MP3/USB 2.0 High Speed Switch | |
| Fabricantes | Intersil | |
| Logotipo |  |
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MP3/USB 2.0 High Speed Switch with Negative
Signal Handling/Click and Pop Suppression
ISL54210
Features
The Intersil ISL54210 dual SPDT (Single Pole/Double
Throw) switch combines low distortion audio and
accurate USB 2.0 high-speed data (480Mbps) signal
switching in the same low voltage device. When
operated with a 2.7V to 3.6V single supply, these analog
switches allow audio signal swings below-ground,
allowing the use of a common USB and audio
headphone connector in Personal Media Players and
other portable battery powered devices.
The ISL54210 incorporates circuitry for the detection of
the USB VBUS voltage, which is used to switch between
the audio and USB signal sources.
It has an enable pin (CTRL) to open all switches and
activate the audio click/pop (C/P) circuitry. The high
off-isolation and special C/P circuitry of the audio
switches eliminates click and pops in the head-phones
when the audio CODEC drivers are powering up/down
or when a headphone is inserted or removed from the
jack.
It’s available in a tiny 10 Ld 1.8mmx1.4mm ultra-thin
µTQFN package and a 10 Ld 3mmx3mm TDFN package.
It operates over a temperature range of -40°C to +85°C.
Related Literature (see page 19)
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Application Note AN1407 “ISL54210EVAL1Z
Evaluation Board User’s Manual”
• High Speed (480Mbps) and Full Speed (12Mbps)
Signaling Capability per USB 2.0
• Detection of VBUS Voltage on USB Cable
• Low Distortion Negative Signal Capability
• Clickless/Popless Audio Switches
• Enable Pin to Open all Switches
• Low Distortion Headphone Audio Signals
- THD+N at 1mW into 32Ω Load. . . . . . . . . 0.014%
• Crosstalk (20Hz to 20kHz). . . . . . . . . . . . . -100dB
• Off-Isolation (20Hz to 100kHz) . . . . . . . . . . . 95dB
• Single Supply Operation (VDD) . . . . . . 2.7V to 3.6V
• -3dB Bandwidth USB Switch . . . . . . . . . . . . 700MHz
• Low ON Capacitance @ 240MHz. . . . . . . . . . . 4.2pF
• Available in µTQFN and TDFN Packages
• Compliant with USB 2.0 Short Circuit Requirements
Without Additional External Components
• Pb-Free (RoHS Compliant)
Applications* (see page 19)
• MP3 and other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
• Audio/USB Switching
Application Block Diagram
VBUS
3.3V
VBUS
VDD
ISL54210
LOGIC CONTROL
4MΩ
CTRL
4MΩ
COM -
200kΩ
COM +
D-
D+
200kΩ
CLICK
AND
POP
R
L
GND
µCONTROLLER
USB HIGH-SPEED
TRANSCEIVER
AUDIO CODEC
March 18, 2010
FN6661.2
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. 2008, 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL54210
Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V, GND = 0V, VBUSH = 3.8V, VBUSL = 3.2V,
VCTRLH = 1.4V, VCTRLL = 0.5V, (Note 11), Unless Otherwise Specified.
Boldface limits apply over the operating temperature range,
-40°C to +85°C. (Continued)
PARAMETER
Discharge Pull-Down
Resistance, RL, RR
USB Switches (D+, D-)
Analog Signal Range,
VANALOG
ON-Resistance, rON
ON-Resistance, rON
rON Matching Between
Channels, ΔrON
rON Flatness, RFLAT(ON)
OFF Leakage Current,
ID+(OFF) or ID-(OFF)
ON Leakage Current, IDX
TEST CONDITIONS
VDD = 3.6V, VBUS = 3.2V,
CTRL = 0.5V, VCOM- or VCOM+ =
-0.85V, 0.85V, VL or VR = -0.85V,
0.85V, VD+ and VD- = floating;
measure current through the
discharge pull-down resistor and
calculate resistance value.
TEMP
MIN
(°C) (Notes 12, 13)
+25
-
VDD = 2.7V to 3.6V, VBUS = 5.0V,
CTRL = 0V or VDD
VDD = 3.3V, VBUS = 4.4V,
CTRL = 1.4V, ICOMx = 1mA, VD+ or
VD- = 3.3V (see Figure 3, Note 15)
VDD = 3.3V, VBUS = 4.4V, CTRL = 0V
or VDD, ICOMx = 40mA, VD+ or
VD-= 0V to 400mV
(see Figure 3, Note 15)
VDD = 3.3V, VBUS = 4.4V, CTRL = 0V
or VDD, ICOMx = 40mA, VD+ or
VD-= Voltage at max rON
(Notes 15, 16)
VDD = 3.3V, VBUS = 4.4V, CTRL = 0V
or VDD, ICOMx = 40mA, VD+ or
VD-= 0V to 400mV (Notes 14, 15)
VDD = 3.6V, VBUS = 0V, CTRL = 3.6V,
VCOM- or VCOM+ = 0.5V, 0V, VD+ or
VD- = 0V, 0.5V, VL and VR = float
VDD = 3.6V, VBUS = 5.25V, CTRL
= 0V or VDD, VD+ or VD- = 2.7V,
VCOM- or VCOM+ = Float, VL and
VR = float; measuring current
through 200k resistor at COM side
Full
+25
Full
25
Full
25
Full
25
Full
25
Full
25
Full
0
-
-
-
-
-
-
-
-
-10
-50
-20
-30
TYP
40
-
25
-
5.4
-
0.02
-
0.45
-
4
-
11
-
MAX
(Notes 12, 13) UNITS
-Ω
VDD
35
40
6
7.5
0.25
0.25
0.55
0.6
10
50
20
30
V
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
nA
nA
µA
µA
DYNAMIC CHARACTERISTICS
USB Turn-ON Time, tON
VDD = 2.7V, RL = 50Ω, CL = 10pF
(see Figure 1)
USB Turn-OFF Time, tOFF
VDD = 2.7V, RL = 50Ω, CL = 10pF
(see Figure 1)
Audio Turn-ON Time, tON
VDD = 2.7V, RL = 50Ω, CL = 10pF
(see Figure 1)
Audio Turn-OFF Time, tOFF VDD =2.7V, RL = 50Ω, CL = 10pF
(see Figure 1)
Skew, tSKEW
VDD = 3.0V, VBUS = 5.0V, CTRL = 0V
or 3V, RL = 45Ω, CL = 10pF, tR = tF =
750ps at 480Mbps,
(Duty Cycle = 50%) (see Figure 6)
Total Jitter, tJ
VDD =3.0V, VBUS = 5.0V, CTRL = 0V
or 3V, RL = 50Ω, CL = 10pF, tR = tF =
750ps at 480Mbps
Propagation Delay, tPD
VDD = 3.0V, VBUS = 5.0V, CTRL = 0V
or 3V, RL = 45Ω, CL = 10pF
(see Figure 6)
25
25
25
25
25
25
25
-
-
-
-
-
-
-
43
14.5
7.5
130
50
210
250
- ns
- ns
- µs
- ns
- ps
- ps
- ps
5 FN6661.2
March 18, 2010
5 Page 
ISL54210
Typical Application Block Diagram
3.3V
VBUS
VBUS
VDD
ISL54210
LOGIC CONTROL
4MΩ
CTRL
4MΩ
COM -
COM +
200kΩ
200kΩ
CLICK
AND
POP
D-
D+
R
L
GND
µCONTROLLER
USB
HIGH-SPEED
TRANSCEIVER
AUDIO
CODEC
Detailed Description
The ISL54210 device is a dual single pole/double throw
(SPDT) analog switch that operates from a single DC
power supply in the range of 2.7V to 3.6V. It was
designed to function as a dual 2-to-1 multiplexer to
select between USB differential data signals and audio L
and R stereo signals. It comes in tiny µTQFN and TDFN
packages for use in MP3 players, PDAs, cellphones, and
other personal media players.
The part consists of two 2.5Ω audio switches and two
5.5Ω USB switches. The audio switches can accept
signals that swing below ground. They were designed to
pass audio left and right stereo signals, that are ground
referenced, with minimal distortion. The USB switches
were designed to pass high-speed USB differential data
signals with minimal edge and phase distortion.
The ISL54210 was specifically designed for MP3 players,
personal media players and cellphone applications that
need to combine the audio headphone jack and the USB
data connector into a single shared connector, thereby
saving space and component cost. A “Typical Application
Block Diagram” of this functionality is shown on page 11.
The ISL54210 incorporates circuitry for the detection of
the USB VBUS voltage, which is used to switch between
the audio CODEC drivers and USB transceiver of the MP3
player or cellphone. The ISL54210 contains a logic
control pin (CTRL) that when driven low while VBUS is
low, opens all switches and activates the audio click and
pop circuitry.
A detailed description of the two types of switches are
provided in the following sections. In a typical
application, the USB transmission and audio playback are
intended to be mutually exclusive operations.
Audio Switches
The two audio switches (L, R) are 2.5Ω switches that can
pass signals that swing below ground. Crosstalk between
the audio switches is <-100dB over the audio band.
These switches have excellent off-isolation >105dB over
the audio band with a 32Ω load.
Over a signal range of ±1V (0.707VRMS) with
VDD > 2.7V, these switches have an extremely low rON
resistance variation. They can pass ground referenced
audio signals with very low distortion (<0.06% THD+N)
when delivering 15.6mW into a 32Ω headphone speaker
load. See Figures 16, 17, 18, and 19 THD+N in “Typical
Performance Curves” beginning on page 14.
The audio drivers should be connected at the L and R
side of the switch (pins 5 and 6 for µTQFN, pins 6 and 7
for TDFN) and the speaker loads should be connected at
the COM side of the switch (pins 2 and 3 for µTQFN, pins
3 and 4 for TDFN).
The audio switches have click and pop circuitry on the L
and R side that is activated when the VBUS voltage is ≤
VDD + 0.2V or floating and the CTRL voltage ≤ to 0.5V or
floating. The ISL54210 should be put in this mode before
powering down or powering up of the audio CODEC
drivers. In this mode, both the audio and USB in-line
switches will be OFF and the audio click and pop circuitry
will be ON. The high off-isolation of the audio switches
along with the click and pop circuitry will isolate the
transients generated during power-up and power-down
of the audio CODECs from getting through to the
headphones, thus eliminating click and pop noise in the
headphones.
The audio switches are active (turned ON) whenever the
VBUS voltage is ≤ VDD + 0.2V or floating and the CTRL
voltage ≥ to 1.4V.
11 FN6661.2
March 18, 2010
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet ISL54210.PDF ] | |
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