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Evaluates: MAX98357A/MAX98357B
(WLP)
MAX98357 Development Board/
Evaluation System (WLP)
General Description
The MAX98357 development board (DEV board) is a fully
Features
● 2.5V to 5.5V Single-Supply Operation
assembled and tested PCB that evaluates the MAX98357
I S digital input Class D power amplifier. The DEV board
● Only a Single External Component (VDD Capacitor)
2
Required in Many Applications
operates from a single 2.5V to 5.5V DC power supply and
is capable of delivering 3.2W into a 4Ω load. The device
outputs can be connected directly to a speaker load for
filterless applications. However, a filter can be added to
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● I S, Left-Justified, or TDM Input
● Five Selectable Gains (3db, 6dB, 9dB, 12dB, and
15dB)
2
ease evaluation. The MAX98357A accepts standard I S
● Audio Channel Select (Left, Right, and Mono Mix)
● Filterless Operation
data and the MAX98357B accepts left-justified digital
audio data. Both versions also support 8-channel TDM
audio data.
● Optional Class D Output Filters for Ease of
Evaluation
The MAX98357 evaluation system (EV system) includes
the MAX98357 DEV board and Maxim Integrated’s audio
interface board (MAXAUDINT001# board).
● Proven PCB Layout
● Fully Assembled and Tested
The MAXAUDINT001# board provides an easy-to-use
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USB audio-to-I S converter. This allows for any computer
Ordering Information appears at end of data sheet.
to become a digital audio source, which can be used to
evaluate the devices. The MAXAUDINT001# board can
also be used to power the MAX98357. This allows for a
complete evaluation from a single USB connection.
2.5V TO 5.5V
10µF
0.1µF
VDD
GAIN_SLOT
PCM
MAX98357
LRCLK
AUDIO
BCLK
DIGITAL
OUTP
OUTN
INTERFACE
BOARD
CLASS D
OUTPUT STAGE
AUDIO
INTERFACE
DAC
DIN
SD_MODE
Figure 1. Simplified Block Diagram
19-6833; Rev 2; 9/18