Evaluation Board User Guide
UG-360
One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Te l: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluation Board for SSM3302 2 × 10 W Filterless Class-D Stereo Audio Amplifier
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 8
PACKAGE CONTENTS
EVAL-SSM3302Z evaluation board
OTHER SUPPORTING DOCUMENTATION
SSM3302 data sheet
GENERAL DESCRIPTION
The SSM3302 is a fully integrated, high efficiency, stereo Class-D
audio amplifier. The application circuit requires a minimum of
external components and operates from a single 7 V to 18 V supply.
It is capable of delivering 2 × 8 W of continuous output power
into an 8 Ω load (or 2 × 10 W into 4 Ω) with <1% total harmonic
distortion plus noise (THD + N) from a 12 V supply. In addition,
while mono mode is active, a load as small as 2 Ω up to 20 W
continuous output power can be driven by stacking the stereo
output terminals.
Spread spectrum pulse density modulation is used to provide
lower EMI-radiated emissions compared with other Class-D
architectures. The SSM3302 includes an optional modulation select
pin (ultralow EMI emission mode) that significantly reduces the
radiated emissions at the Class-D outputs, particularly above
100 MHz. The SSM3302 can pass FCC Class-B emissions testing
with an unshielded 20 inch cable using common-mode choke-
based filtering.
The fully differential input of the SSM3302 provides excellent
rejection of common-mode noise on the input. The device also
includes a highly flexible gain select pin that only requires one
series resistor to choose any of the five gain options between 9 dB
and 24 dB, with no change to the input impedance. The benefit
of this is to improve gain matching between multiple SSM3302
devices within a single application compared to using external
resistors to set gain.
This user guide describes how to configure and use the SSM3302
evaluation board. This user guide should be read in conjunction
with the SSM3302 data sheet, which provides specifications,
internal block diagrams, and application guidance for the
amplifier IC.
EVALUATION BOARD OVERVIEW
The SSM3302 evaluation board carries a complete circuit for
driving a pair of loudspeakers. Figure 1 shows the top view of
the evaluation board, and Figure 2 shows the bottom view of the
evaluation board.
EVALUATION BOARD TOP VIEW AND BOTTOM VIEW
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Figure 1. SSM3302 Evaluation Board Top View
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Figure 2. SSM3302 Evaluation Board Bottom View