19-4510; Rev 0; 3/09
MAX14535E Evaluation Kit
General Description
The MAX14535E evaluation kit (EV kit) demonstrates
the MAX14535E double-pole/double-throw (DPDT) ana-
log switch featuring negative signal capability, low on-
resistance (0.135Ω R
ON
), and input shunt resistors 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.
Features
o
Input Shunt Resistors for Built-In Click-and-Pop
Reduction
o
Low 0.135Ω On-Resistance (R
ON
)
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
Evaluates: MAX14535E
Ordering Information
PART
MAX14535EEVKIT+
TYPE
EV Kit
+Denotes
lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION
C1, C3–C7
QTY
6
DESCRIPTION
0.1μF ±10%, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K
10μF ±10%, 10V X7R ceramic
capacitor (0805)
Murata GRM21BR71A106K
Not installed, ferrite-bead inductor
(0603)
3-pin headers
DESIGNATION
OUT
R1–R4
USB
U1
—
—
QTY
1
4
1
1
3
1
0
DESCRIPTION
Stereo headphone jack (3.5mm)
±5% resistors (1206)
USB type-B right-angle receptacle
DPDT analog switch (10 UTQFN)
Maxim MAX14535EEVB+
(Top Mark: AAS)
Shunts (JU1, JU2, JU3)
PCB: MAX14535E Evaluation Kit+
C2
1
FB1
JU1, JU2, JU3
0
3
Component Supplier
SUPPLIER
Murata Electronics North America, Inc.
PHONE
770-436-1300
WEBSITE
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
Evaluates: MAX14535E
Quick Start
Required Equipment
• User-supplied PC with a spare USB port
• A-to-B USB cable
• One stereo headphone
• Two audio signal sources ranging between -1.5V
and +3V
source connected to the NC_1 and NC_2 PCB
pads.
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.
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
IC features low 0.135Ω R
ON
resistance. An active-high
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.
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.
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.
1) Connect the
powered
USB cable from the comput-
er to the EV kit’s USB receptacle.
2) Verify that shunts are installed as follows:
JU1: Pins 1-2 (USB power)
JU2: Pins 1-2 (switches enabled)
JU3: Pins 2-3 (NC_ terminals selected)
3) Verify that the audio source outputs are disabled.
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.
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
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.
Table 1. Power Supply Configuration (JU1)
SHUNT POSITION
1-2*
2-3
VCC PIN CONNECTION
+5V
VIN PCB pad
MAX14535E VCC POWER
Connect a
powered
USB cable to the USB receptacle. VCC set to +5V USB
power.**
User-provided DC power supply.
VCC range: +2.4V to +5.5V**
*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
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MAX14535E Evaluation Kit
Switch Enable
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.
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.
Evaluates: MAX14535E
Table 2. Switch Enable Configuration (JU2)
SHUNT POSITION
1-2*
2-3
—
EN PIN CONNECTION
VCC
GND
EN PCB pad
SWITCH ENABLE
Switch enabled
Switch set to high impedance
Driven by external controller; remove capacitor C6
*Default
position.
Table 3. Digital Control Configuration (JU3)
SHUNT POSITION
1-2
2-3*
—
CB PIN CONNECTION
VCC
GND
CB PCB pad
SWITCH POSITION
NO_
NC_
Driven by external controller; remove capacitor C7
*Default
position.
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3
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