MAX98400AEVKIT+【PDF 1/12 页】KIT EVAL FOR MAX98400A

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19-5477; Rev 0; 8/10

MAX98400A Evaluation Kit

General Description

The MAX98400A evaluation kit (EV kit) configures the

MAX98400A Class D amplifier to drive 2x20W into a pair of

8 I speakers in stereo mode, or 1x40W into a 4 I speaker

in mono mode, for audio applications. The EV kit operates

from an 8V to 28V DC power supply. The EV kit is config-

ured for +20.1dB gain. The EV kit accepts a pair of single-

ended or differential input signals and provides two sets of

differential outputs for speakers.

The EV kit has two independent MAX98400A circuits,

demonstrating direct speaker driving (for low component

count) and filtered output driving (for ease of evaluation).

The EV kit comes with two MAX98400AETX+ devices

installed.

The EV kit provides an option to control the limiter,

thermal foldback, input configuration, gain, shutdown,

and mono mode of the MAX98400A. The EV kit also

provides an input pad to accept an optional external power

supply for powering the device’s preamplifiers. The EV kit

Features

S 8V to 28V Single DC Power-Supply Operation

S Fully Differential Inputs and Outputs

S Drives 2x20W into 8 I Speakers in Stereo Mode

S Drives 1x40W into 4 I Speaker in Mono Mode

S Limiter Control

S Thermal Foldback

S Shutdown Control

S Evaluates the MAX98400A in a 36-Pin TQFN

Package with an Exposed Pad

S U1 Configured for Filterless Output

S U2 Configured for Filtered Output

S Fully Assembled and Tested

Ordering Information

includes convenient audio input and output connectors.

PART

MAX98400AEVKIT+

TYPE

EV Kit

+ Denotes lead(Pb)-free and RoHS compliant.

Component List

DESIGNATION

QTY

DESCRIPTION

DESIGNATION

QTY

DESCRIPTION

FILTERLESS EVALUATION (U1)

220 F F Q 20%, 35V electrolytic

capacitor (radial leaded, 5mm

GAIN1_1,

GAIN2_1, LIM_1

INL1

3-pin headers

White phono jack

C101

C102A, C102B

C103, C104

C105–C108

C111–C114

spacing), 10mm diameter x

12.5mm high

Panasonic EEU-FM1V221

1 F F Q 10%, 50V X7R ceramic

capacitors (0805)

TDK C2012X7R1H105K

1 F F Q 10%, 10V X7R ceramic

capacitors (0603)

Murata GRM188R71A105K

1 F F Q 10%, 25V X7R ceramic

capacitors (0805)

Murata GRM21BR71E105K

Not installed, ceramic

capacitors (0603)

22 I at 100MHz ferrite bead

INR1

JU104, JU105,

SHDN_1 , TEMP_1

L1+, L1-, R1+,

R1-

MONO_1

R101, R103,

R104, R105

R102, R107

R106

R111–R114

SPKL1+, SPKL1-,

SPKR1+, SPRK1-

Red phono jack

2-pin headers

Not installed, multipurpose test

points

Not installed, 2-pin header

Not installed, resistors (0603)

100k I Q 5% resistors (0603)

Not installed, potentiometer

(3/8in)

0 I Q 5% resistors

Binding posts

FB1

(0805)

Murata BLM21PG220SN1D

_______________________________________________________________ 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.

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