MAX98304EVKIT データシートの表示（PDF） - Maxim Integrated

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MAX98304EVKIT

MAX98304 Evaluation Kit

Maxim Integrated 

MAX98304 Evaluation Kit

Component Suppliers

SUPPLIER

PHONE

WEBSITE

Murata Electronics North America, Inc.

770-436-1300

www.murata-northamerica.com

TOKO America, Inc.

847-297-0070

www.tokoam.com

Note: Indicate that you are using the MAX98304EWL+ when contacting these component suppliers.

Quick Start

Recommended Equipment

• MAX98304 EV kit

• 5V, 2A DC supply

• 4I speaker

• Mono audio signal source

Procedure

The EV kit is fully assembled and tested. Follow the

steps below to verify board operation. Caution: Do not

turn on the power supply until all connections are

completed.

1) Verify that shunts are installed as follows:

JU1: Installed (single-ended input)

JU2: Pins 1-2 (device enabled)

JU3: Pins 1-5 (12dB gain)

2) Connect the power-supply positive and negative out-

puts to the PVDD and PGND pads or binding posts

on the EV kit, respectively.

3) Verify that the audio source output is disabled.

4) Connect the mono audio source to the INPUT RCA

jack or between the IN+ and IN- pads on the EV kit.

5) Connect the speaker across the FOUT+ and FOUT-

test points.

6) Set the power-supply output to 5V.

7) Enable the power-supply output.

8) Enable the audio source.

9) Verify that the speaker is playing the audio source

signal.

Detailed Description of Hardware

The MAX98304 EV kit features the MAX98304 filterless

Class D amplifier, designed to drive a mono speaker

in portable audio applications. The EV kit comes with a

MAX98304EWL+ in a 9-bump, 0.3mm pitch WLP. The

EV kit operates from a DC power supply that provides

2.5V to 5.5V and 2A of current. The EV kit accepts a

differential or single-ended audio input. The audio input

source is amplified to drive 3.2W into a 4I speaker.

JU1 configures the EV kit inputs for single-ended or

differential operation. JU2 enables or disables the

speaker amplifier. The amplifier overall gain can be set

between 0dB and +12dB using JU3. The EV kit provides

a set of differential outputs. The device outputs (FOUT+,

FOUT-) can be connected directly to a speaker load

without any filtering with 60cm of cable. However, filter

components can be added to ease evaluation. See the

Filtered Output section for additional information.

Input Mode

JU1 provides the option to select between a differential

or single-ended input mode for the EV kit. See Table 1

for JU1 configuration.

Table 1. Input Mode (JU1)

SHUNT

POSITION

IN- PCB PAD

Installed*

Connected to PGND

Not installed

Connected to a

user-supplied negative

differential input

*Default position.

INPUT MODE

Single-ended

input

Differential

input

2   _______________________________________________________________________________________

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