Analog Devices EVAL-SSM2317-MINI Quick Start Manual
Analog Devices EVAL-SSM2317-MINI Quick Start Manual

Analog Devices EVAL-SSM2317-MINI Quick Start Manual

For filterless class-d audio amplifier

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FEATURES

Single-ended and differential input capability
Small size board allows easy integration into custom
space-constrained applications (6.6 mm × 6.6 mm)

GENERAL DESCRIPTION

The SSM2317 is a fully integrated, single-chip, mono Class-D
audio amplifier. It is designed to maximize performance for
mobile phone applications. The application circuit requires a
minimum of external components and operates from a single
2.5 V to 5.5 V supply. It is capable of delivering 1.4 W of con-
tinuous output power with less than 1% THD + N, driving an
8 Ω load from a single 5.0 V supply.
The SSM2317 is equipped with a differential mode input port
and a high efficiency, full H-bridge at the output that enables
direct coupling of the audio power signal to the loudspeaker.
The differential mode input stage allows for cancelling of
common-mode noise.
The part also features a high efficiency, low noise output
modulation scheme that does not require external LC output
filters when attached to an inductive load. It operates with
85% efficiency at 1.4 W into 8 Ω from a 5.0 V supply and has
a signal-to-noise ratio (SNR) that is better than 93 dB.
Figure 1. SSM2317 Evaluation Board Top View
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards are supplied "as is" and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may
result from its use. Analog Devices reserves the right to change devices or specifications at any
time without notice. Trademarks and registered trademarks are the property of their respective
owners. Evaluation boards are not authorized to be used in life support devices or systems.
Filterless Class-D Audio Amplifier
Spread-spectrum modulation is used to provide lower EMI-
radiated emissions. The modulation provides high efficiency
even at low output power. Filterless operation also helps to
decrease distortion due to the nonlinearities of output LC filters.
This data sheet describes how to configure and use the SSM2317
mini evaluation board to test the SSM2317. It is recommended
that this data sheet be read in conjunction with the
data sheet, which provides more detailed information about
the specifications, internal block diagrams, and application
guidance for the amplifier IC.

EVALUATION BOARD DESCRIPTION

The SSM2317 mini evaluation board is a small form factor
board (6.6 mm × 6.6 mm) with a pair of differential audio
input terminals (IN+ and IN−), a pair of audio signal output
terminals (OUT+ and OUT−), a ground terminal, and a VDD
terminal. It is designed for easy integration into the SSM2317
application board.
The SSM2317 mini evaluation board carries a complete
application circuit for driving a loudspeaker. Figure 1 shows
the top view of the evaluation board, and Figure 2 shows the
bottom view.
Figure 2. SSM2317 Evaluation Board Bottom View
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Evaluation Board for
EVAL-SSM2317-MINI
©2009 Analog Devices, Inc. All rights reserved
SSM2317
www.analog.com
.

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Summary of Contents for Analog Devices EVAL-SSM2317-MINI

  • Page 1: Features

    Devices for its use, nor for any infringements of patents or other rights of third parties that may One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. result from its use. Analog Devices reserves the right to change devices or specifications at any Tel: 781.329.4700 www.analog.com...
  • Page 2: Table Of Contents

    EVAL-SSM2317-MINI TABLE OF CONTENTS     Features ....................1 PCB Layout Guidelines ..............4     General Description ................. 1 Getting Started ................4     Evaluation Board Description ............1 Evaluation Board Schematic and Artwork ........5     Revision History ................2 Ordering Information ...............8...
  • Page 3: Evaluation Board Hardware

    EVAL-SSM2317-MINI EVALUATION BOARD HARDWARE INPUT AND OUTPUT CONFIGURATION Input Coupling Capacitor Selection—C1 and C2 The input coupling capacitors, C1 and C2, should be large On the bottom side of the board, there are two pad terminals, enough to couple the low frequency components in the IN+ and IN−, as shown in Figure 5.
  • Page 4: Pcb Layout Guidelines

    EVAL-SSM2317-MINI PCB LAYOUT GUIDELINES Use 5 mils traces at the SSM2317 pads to prevent the solder from escaping. To keep the EMI under the allowable limit and ensure that the Top Layer Copper Land and Ground Pouring amplifier chip operates under the temperature limit, PCB layout is critical in application design.
  • Page 5: Evaluation Board Schematic And Artwork

    EVAL-SSM2317-MINI EVALUATION BOARD SCHEMATIC AND ARTWORK 10µF 0.1µF B0603 OUT+ OUT+ SSM2317 0.1µF IN– IN– OUT– B0603 OUT– 0.1µF 6.98kΩ 100kΩ 100kΩ Figure 3. Schematic of the SSM2317-MINI Evaluation Board Rev. 0 | Page 5 of 8...
  • Page 6 EVAL-SSM2317-MINI Figure 4. Top Layer with Top Silkscreen Figure 7. Top Layer Figure 5. Bottom Layer with Bottom Silkscreen (Mirror Image) Figure 8. Top Layer Figure 6. Top Silkscreen Figure 9. Layer 2 (Ground Plane) Rev. 0 | Page 6 of 8...
  • Page 7 EVAL-SSM2317-MINI Figure 10. Layer 3 (Power Plane) Figure 12. All Layer Silkscreen Figure 11. Bottom Layer Rev. 0 | Page 7 of 8...
  • Page 8: Ordering Information

    ESD CAUTION ORDERING GUIDE Model Description SSM2317-MINI-EVALZ Evaluation Board Z = RoHS Compliant Part. ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB07824-0-5/09(0) Rev. 0 | Page 8 of 8...

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