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MAX14535EEVKIT

MAX14535E Evaluation Kit

Maxim Integrated 

MAX14535E Evaluation Kit

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

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

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 RON 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.

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*

VCC PIN CONNECTION

+5V

MAX14535E VCC POWER

Connect a powered USB cable to the USB receptacle. VCC set to +5V USB

power.**

2-3

VIN PCB pad

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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