Add to Signal Chain Designer

SSM2304:  2 W Filterless Class-D Stereo Audio Amplifier

Product Details


Newer Alternatives: NEW DESIGNS:
SSM2306 2 W, Filterless, Class-D Stereo Audio Amplifier

The SSM2304 is a fully integrated, high efficiency, Class-D stereo audio amplifier. It is designed to maximize performance for portable applications. The application circuit requires a mini-mum of external components and operates from a single 2.5 V to 5.0 V supply. It is capable of delivering 2 W of continuous output power with less than 10% THD + N driving a 4 Ω load from a 5.0 V supply.

The SSM2304 features a high efficiency, low noise modulation scheme. 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 98 dB. PDM modulation is used to provide lower EMI-radiated emissions compared with other Class-D architectures.

The SSM2304 has a micropower shutdown mode with a typical shutdown current of 20 nA. Shutdown is enabled by applying a logic low to the SD pin.

The architecture of the device allows it to achieve a very low level of pop and click. This minimizes voltage glitches at the output during turn-on and turn-off, thus reducing audible noise on activation and deactivation.

The fully differential input of the SSM2304 provides excellent rejection of common-mode noise on the input. Input coupling capacitors can be omitted if the dc input common-mode voltage is approximately VDD/2.

The SSM2304 also has excellent rejection of power supply noise, including noise caused by GSM transmission bursts and RF rectification.

The SSM2304 has a preset gain of 18 dB, which can be reduced by using external resistors.

The SSM2304 is specified over the commercial temperature range (−40°C to +85°C). It has built-in thermal shutdown and output short-circuit protection. It is available in a 16-lead, 3 mm × 3 mm lead-frame chip scale package (LFCSP).

Applications
  • Notebooks and PCs
  • Mobile phones
  • MP3 players
  • Portable gaming
  • Portable electronics
  • Educational toys

FEATURES and BENEFITS

  • Filterless Class-D amplifier with built-in output stage
  • 2 W into 4 Ω and 1.4 W into 8 Ω at 5.0 V supply with <10% THD
  • 85% efficiency at 5.0 V, 1.4 W into 8 Ω speaker
  • Better than 98 dB SNR (signal-to-noise ratio)
  • Available in 16-lead, 3 mm × 3 mm LFCSP
  • Single-supply operation from 2.5 V to 5.0 V
  • 20 nA ultralow shutdown current
  • Short-circuit and thermal protection
  • Pop-and-click suppression
  • Built-in resistors reduce board component count
  • Default fixed 18 dB gain and user-adjustable

Functional Block Diagram for SSM2304

Documentation

Title Content Type File Type
SSM2304: 2 W Filterless Class-D Stereo Audio Amplifier Data Sheet (Rev 0, 01/2007) (pdf, 928 kB) Data Sheets PDF
AN-938: Digital and Analog Measurement Units for Digital CMOS Microphone Preamplifier ASICs  (pdf, 75 kB) Application Notes PDF
Class D Audio Amplifiers: What, Why, and How
(Planet Analog, 2/1/2007)
Technical Articles HTML
Analog Devices Introduces Class-D Audio Amplifiers
(EFY Times, 8/10/2006)
Product Reviews HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
SSM2602 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

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

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.

SSM2304 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
SSM2304Z-EVAL Status: Contact ADI Evaluation Board $50.50 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.

Check Inventory & Purchase

View Sales and Distribution Offices

沪ICP备09046653号
content here.
content here.

Review this Product

Close