19-5477; Rev 0; 8/10
MAX98400A Evaluation Kit
General Description
Features
S 8V to 28V Single DC Power-Supply Operation
The MAX98400A evaluation kit (EV kit) configures the
MAX98400A Class D amplifier to drive 2x20W into a pair of
8I speakers in stereo mode, or 1x40W into a 4I 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.
S Fully Differential Inputs and Outputs
S Drives 2x20W into 8I Speakers in Stereo Mode
S Drives 1x40W into 4I Speaker in Mono Mode
S Limiter Control
S Thermal Foldback
S Shutdown Control
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.
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
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
includes convenient audio input and output connectors.
Ordering Information
PART
TYPE
MAX98400AEVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
QTY
DESCRIPTION
FILTERLESS EVALUATION (U1)
GAIN1_1,
GAIN2_1, LIM_1
3
3-pin headers
220FF Q20%, 35V electrolytic
capacitor (radial leaded, 5mm
spacing), 10mm diameter x
12.5mm high
INL1
INR1
1
1
White phono jack
Red phono jack
C101
1
JU104, JU105,
SHDN_1, TEMP_1
Panasonic EEU-FM1V221
4
2-pin headers
1FF Q10%, 50V X7R ceramic
capacitors (0805)
TDK C2012X7R1H105K
C102A, C102B
C103, C104
2
2
L1+, L1-, R1+,
R1-
Not installed, multipurpose test
points
0
0
0
2
0
4
4
MONO_1
Not installed, 2-pin header
Not installed, resistors (0603)
100kI Q5% resistors (0603)
1FF Q10%, 10V X7R ceramic
capacitors (0603)
Murata GRM188R71A105K
R101, R103,
R104, R105
R102, R107
1FF Q10%, 25V X7R ceramic
capacitors (0805)
Murata GRM21BR71E105K
C105–C108
C111–C114
FB1
4
0
1
Not installed, potentiometer
(3/8in)
R106
R111–R114
0I Q5% resistors
Not installed, ceramic
capacitors (0603)
SPKL1+, SPKL1-,
SPKR1+, SPRK1-
Binding posts
22I at 100MHz ferrite bead
(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.