Datasheet

Evaluates: MAX98357A/MAX98357B
(WLP)
MAX98357 Development Board/
Evaluation System (WLP)
19-6833; Rev 1; 4/14
Ordering Information appears at end of data sheet.
General Description
The MAX98357 development board (DEV board) is a fully
assembled and tested PCB that evaluates the MAX98357
I
2
S digital input Class D power amplifier. The DEV board
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
ease evaluation. The MAX98357A accepts standard I
2
S
data and the MAX98357B accepts left-justified digital
audio data. Both versions also support 8-channel TDM
audio data.
The MAX98357 evaluation system (EV system) includes
the MAX98357 DEV board and Maxim Integrated’s audio
interface board (AUDINT001 board).
The AUDINT001 board provides an easy-to-use USB
audio-to-I
2
S converter. This allows for any computer to
become a digital audio source, which can be used to
evaluate the devices. The AUDINT001 board can also be
used to power the MAX98357. This allows for a complete
evaluation from a single USB connection.
Features
● 2.5V to 5.5V Single-Supply Operation
● Only a Single External Component (VDD Capacitor)
Required in Many Applications
● I
2
S, Left-Justified, or TDM Input
● Five Selectable Gains (3db, 6dB, 9dB, 12dB, and
15dB)
● Audio Channel Select (Left, Right, and Mono Mix)
● Filterless Operation
● Optional Class D Output Filters for Ease of
Evaluation
● Proven PCB Layout
● Fully Assembled and Tested
Figure 1. Simplified Block Diagram
10µF 0.1µF
VDD GAIN_SLOT
2.5V TO 5.5V
DAC
MAX98357
DIGITAL
AUDIO
INTERFACE
CLASS D
OUTPUT STAGE
OUTP
OUTN
AUDIO
INTERFACE
BOARD
LRCLK
PCM
BCLK
DIN
SD_MODE