MAX14535EEVKIT [MAXIM]
Demonstrates USB Power Operation;
| 型号： | MAX14535EEVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Demonstrates USB Power Operation |
| 文件： | 总5页 (文件大小：127K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4510; Rev 0; 3/09
MAX14535E Evaluation Kit
vluates:MAX1435E
General Description
Features
The MAX14535E evaluation kit (EV kit) demonstrates
the MAX14535E double-pole/double-throw (DPDT) ana-
log switch featuring negative signal capability, low on-
o Input Shunt Resistors for Built-In Click-and-Pop
Reduction
o Low 0.135Ω On-Resistance (R
)
ON
resistance (0.135Ω R ), and input shunt resistors on
ON
the NO_ terminals for click-and-pop reduction in
portable audio applications. The IC features a space-
saving ultra-thin QFN package. The EV kit can operate
from a +2.4V to +5.5V DC power supply and comes
configured to operate from USB power.
o -1.5V to Min (3V or VCC) Analog Signal Capability
o +2.4V to +5.5V DC Supply Operation
o Demonstrates USB Power Operation
o Lead(Pb)-Free and RoHS Compliant
o Fully Assembled and Tested
Ordering Information
PART
TYPE
MAX14535EEVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
0.1μF 10%, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K
OUT
R1–R4
USB
1
4
1
Stereo headphone jack (3.5mm)
0ꢀ 5% resistors (1206)
C1, C3–C7
C2
6
1
USB type-B right-angle receptacle
10μF 10%, 10V X7R ceramic
capacitor (0805)
Murata GRM21BR71A106K
DPDT analog switch (10 UTQFN)
Maxim MAX14535EEVB+
(Top Mark: AAS)
U1
1
Not installed, ferrite-bead inductor
(0603)
—
—
3
1
Shunts (JU1, JU2, JU3)
FB1
0
3
PCB: MAX14535E Evaluation Kit+
JU1, JU2, JU3
3-pin headers
Component Supplier
SUPPLIER
Murata Electronics North America, Inc.
PHONE
WEBSITE
770-436-1300
www.murata-northamerica.com
Note: Indicate that you are using the MAX14535E when contacting this component supplier.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX14535E Evaluation Kit
source connected to the NC_1 and NC_2 PCB
pads.
Quick Start
Required Equipment
• User-supplied PC with a spare USB port
• A-to-B USB cable
9) Move the jumper JU3 shunt to pins 1-2.
10) Verify that the headphone is playing the audio
source connected to the NO_1 and NO_2 PCB
pads.
• One stereo headphone
• Two audio signal sources ranging between -1.5V
and +3V
Detailed Description of Hardware
The MAX14535E evaluation kit (EV kit) demonstrates
the MAX14535E DPDT analog switch in a 1.4mm x
1.8mm, 10-pin ultra-thin QFN package specified for
operating over the -40°C to +85°C extended tempera-
ture range. The IC features internal input shunt resistors
on the NO_ terminals. This provides coupling capaci-
tors a place to discharge while the switch is set to the
NC_ terminals providing click-and-pop reduction with-
out additional parts in portable audio applications. The
Procedure
The MAX14535E EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not connect a signal to the NO_1,
NO_2, NC_1, or NC_2 PCB pads until a powered
USB cable is connected to the USB receptacle or
until power is supplied across the VIN and GND
PCB pads.
IC features low 0.135Ω R
resistance. An active-high
ON
1) Connect the powered USB cable from the comput-
enable pin (EN) sets the switches to either high-imped-
ance mode or normal operation. The COM1, COM2,
NC_1, NC_2, NO_1, and NO_2 PCB pads can pass up
to 300mA of continuous current through the
MAX14535E IC. The EV kit can operate from a +2.4V to
+5.5V DC power supply and also comes configured to
operate from USB power.
er to the EV kit’s USB receptacle.
2) Verify that shunts are installed as follows:
JU1: Pins 1-2 (USB power)
vluates:MAX1435E
JU2: Pins 1-2 (switches enabled)
JU3: Pins 2-3 (NC_ terminals selected)
3) Verify that the audio source outputs are disabled.
The user may install optional input resistors in place of
the default 0Ω resistors (R1–R4). PCB pads COM1,
COM2, and GND provide access to the headphone
jack OUT signals.
4) Connect one audio source’s right channel to the
NC_1 PCB pad, the left channel to the NC_2 PCB
pad, and the audio ground return to the nearby
GND PCB pad.
Power Supply
Jumper JU1 provides two options for powering the
MAX14535E VCC supply input. VCC can operate from
a user-supplied +2.4V to +5.5V DC power supply con-
nected across the VIN and GND PCB pads or from a
+5V USB power source. See Table 1 to configure the
VCC supply options using jumper JU1.
5) Connect the other audio source’s right channel to
the NO_1 PCB pad, the left channel to the NO_2
PCB pad, and the audio ground return to the near-
by GND PCB pad.
6) Plug the headphone into the OUT headphone jack.
7) Enable the audio sources.
8) Verify that the headphone is playing the audio
Table 1. Power Supply Configuration (JU1)
SHUNT POSITION
VCC PIN CONNECTION
MAX14535E VCC POWER
Connect a powered USB cable to the USB receptacle. VCC set to +5V USB
1-2*
+5V
power.**
User-provided DC power supply.
VCC range: +2.4V to +5.5V**
2-3
VIN PCB pad
*Default position.
**Do not connect a signal to the NO_1, NO_2, NC_1, or NC_2 PCB pads until a powered USB cable is connected to the USB
receptacle, or until power is supplied across the VIN and GND PCB pads
2
_______________________________________________________________________________________
MAX14535E Evaluation Kit
vluates:MAX1435E
Switch Enable
Digital Control
Jumper JU3 configures the MAX14535E digital-control
bit (CB). The CB input sets the position of the switches
to either the NO_ or NC_ terminals. The CB signal can
also be driven by an external controller using the CB
and nearby GND PCB pads. To use an external con-
troller, remove capacitor C7. See Table 3 to set CB
using jumper JU3.
Jumper JU2 configures the MAX14535E enable input
(EN). The EN signal can also be driven by an external
controller using the EN and nearby GND PCB pads. To
use an external controller, remove capacitor C6. See
Table 2 to set EN using jumper JU2.
Table 2. Switch Enable Configuration (JU2)
SHUNT POSITION
EN PIN CONNECTION
SWITCH ENABLE
Switch enabled
1-2*
2-3
—
VCC
GND
Switch set to high impedance
Driven by external controller; remove capacitor C6
EN PCB pad
*Default position.
Table 3. Digital Control Configuration (JU3)
SHUNT POSITION
CB PIN CONNECTION
SWITCH POSITION
1-2
2-3*
—
VCC
GND
NO_
NC_
CB PCB pad
Driven by external controller; remove capacitor C7
*Default position.
_______________________________________________________________________________________
3
MAX14535E Evaluation Kit
vluates:MAX1435E
Figure 1. MAX14535E EV Kit Schematic
4
_______________________________________________________________________________________
MAX14535E Evaluation Kit
vluates:MAX1435E
Figure 2. MAX14535E EV Kit Component Placement Guide—
Component Side
Figure 3. MAX14535E EV Kit PCB Layout—Component Side
Figure 4. MAX14535E EV Kit PCB Layout—Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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