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SSM2518:  Digital Input Stereo, 2 W, Class-D Audio Power Amplifier

Product Details

Product Status:Recommended for New Designs

The SSM2518 is a digital input, Class-D power amplifier that com-bines a digital-to-analog converter (DAC) and a sigma-delta (Σ-Δ) Class-D modulator. This unique architecture enables extremely low real-world power consumption from digital audio sources with excellent audio performance. The SSM2518 is ideal for power sensitive applications, such as mobile phones and portable media players, where system noise can corrupt small analog signals such as those sent to an analog input audio amplifier.

Using the SSM2518, audio data can be transmitted to the amplifier over a standard digital audio serial interface, thereby significantly reducing the effect of noise sources such as GSM interference or other digital signals on the transmitted audio. The closed-loop digital input design retains the benefits of an all digital amplifier, yet enables very good PSRR and audio performance. The three level, Σ-Δ Class-D modulator is designed to provide the least amount of EMI interference, the lowest quiescent power dissi-pation, and the highest audio efficiency without sacrificing audio quality.

Input is provided via a serial audio interface, programmable to accept all common audio formats including I2S and TDM. Control of the IC is provided via an I2C control interface. The SSM2518 can accept a variety of input MCLK frequencies and can use BCLK as the clock source in some configurations.

Additional features include a soft digital volume control, de-emphasis, and a programmable digital dynamic range compressor.

The architecture of the SSM2518 provides a solution that offers lower power and higher performance than existing DAC plus Class-D solutions. Its digital interface also offers a better system solution for other products whose sole audio source is digital, such as wireless speakers, laptop PCs, portable digital televisions, and navigation systems.

APPLICATIONS

  • Mobile phones
  • Portable media players
  • Laptop PCs
  • Wireless speakers
  • Portable gaming
  • Small LCD televisions
  • Navigation systems

FEATURES and BENEFITS

  • Filterless, digital input Class-D amplifier
  • Serial digital audio interface supports common formats I2S, left justified, right justified, TDM1-16, and PCM
  • 2 channels × 2 W into 4 Ω and 2 channels × 1.4 W into 8 Ω with 1% THD+N, when using a 5 V supply
  • I2C control interface or standalone operation
  • 91% efficiency at full scale into an 8 Ω load
  • 97 dB signal-to-noise ratio (SNR), A-weighted
  • 80 dB power supply rejection ratio (PSRR) at 217 Hz
  • See datasheet for additional features

Functional Block Diagram for SSM2518

Documentation

Title Content Type File Type
SSM2518: Digital Input Stereo, 2 W, Class-D Audio Power Amplifier Data Sheet (Rev A, 12/2011) (pdf, 2019 kB) Data Sheets PDF
CN0296: Low Cost, High Performance Sound Bar System  (pdf, 158 kB) Circuit Note PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
SSM2518 Pmod Xilinx FPGA Reference Design (Wiki Site) Device Drivers HTML
SSM2518 Sound CODEC Linux Driver (Wiki Site) Device Drivers HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

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Price, packaging, availability

SSM2518 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
SSM2518CBZ-R7 Status: Production 16 Ball WLCSP(2.21x2.21mm) 16 Ind Reel, 3000 - $1.36 Y  Material Info PCN Purchase Sample
SSM2518CBZ-RL Status: Production 16 Ball WLCSP(2.21x2.21mm) 16 Ind Reel, 10000 - $1.36 Y  Material Info Notify Me Purchase
SSM2518CPZ Status: Production 20 ld LFCSP 4x4x0.8mm (2.5EP) 20 Ind Tray, 490 $2.29 $1.44 Y  Material Info PCN Purchase Sample
SSM2518CPZ-R7 Status: Production 20 ld LFCSP 4x4x0.8mm (2.5EP) 20 Ind Reel, 1500 - $1.44 Y  Material Info PCN Purchase
SSM2518CPZ-RL Status: Production 20 ld LFCSP 4x4x0.8mm (2.5EP) 20 Ind Reel, 5000 - - Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

SSM2518 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-SSM2518Z Status: Production Evaluation Board $250.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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