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SSM2211:  Low Distortion, 1.5 W Audio Power Amplifier

Product Details

The SSM2211 is a high performance audio amplifier that delivers 1 W rms of low distortion audio power into a bridge-connected 8 Ω speaker load (or 1.5 W rms into a 4 Ω load).

The SSM2211 operates over a wide temperature range and is specified for single-supply voltages between 2.7 V and 5.5 V. When operating from batteries, it continues to operate down to 1.75 V. This makes the SSM2211 the best choice for unregulated applications, such as toys and games.

Featuring a 4 MHz bandwidth and distortion below 0.2% THD + N @ 1 W, superior performance is delivered at higher power or lower speaker load impedance than competitive units. Furthermore, when the ambient temperature is at 25°C, THD + N < 1%, and VS = 5 V on a four-layer PCB, the SSM2211 delivers a 1.5 W output.

The low differential dc output voltage results in negligible losses in the speaker winding and makes high value dc blocking capacitors unnecessary. The battery life is extended by using shutdown mode, which typically reduces quiescent current drain to 100 nA.

The SSM2211 is designed to operate over the −40°C to +85°C temperature range. The SSM2211 is available in 8-lead SOIC (narrow body) and LFCSP (lead frame chip scale) surface-mount packages. The advanced mechanical packaging of the LFCSP models ensures lower chip temperature and enhanced performance relative to standard packaging options.

Applications include personal portable computers, hands-free telephones and transceivers, talking toys, intercom systems, and other low voltage audio systems requiring 1 W output power.


  • Portable computers
  • Personal wireless communicators
  • Hands-free telephones
  • Speaker phones
  • Intercoms
  • Musical toys and talking games


  • 1.5 W output with THD + N < 1%
  • Differential bridge-tied load output
  • Single-supply operation:
    2.7 V to 5.5 V
  • Functions down to 1.75 V
  • Wide bandwidth: 4 MHz
  • Highly stable phase margin: >80 degrees
  • Low distortion: 0.2% THD + N @ 1 W output
  • Excellent power supply rejection

Functional Block Diagram for SSM2211


Title Content Type File Type
SSM2211: Low Distortion, 1.5 W Audio Power Amplifier Data Sheet (Rev F, 12/2013) (pdf, 497 kB) Data Sheets PDF
AN-938: Digital and Analog Measurement Units for Digital CMOS Microphone Preamplifier ASICs  (pdf, 75 kB) Application Notes PDF
AN-211: The Alexander Current-Feedback Audio Power Amplifier  (pdf, 1154 kB) Application Notes PDF
1.5-W Loudspeaker Amplifier Delivers Sound Performance
(Analog Dialogue, Vol. 32, No. 1, 1998)
Analog Dialogue HTML
Audio Processors, Amplifiers Deliver Complete HDTV Audio Subsystem
(EE Times, 10/1/2007)
Product Reviews HTML
ADI: Analog Essential To HDTV Experience
(Electronic Design, 10/1/2007)
Product Reviews HTML
Amplifier pricing where you want it,  (pdf, 1037 kB)
... performance where you need it.
Overview PDF
Medical Applications Overview HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

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Price, packaging, availability

SSM2211 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
SSM2211CPZ-REEL Status: Production 8 ld LFCSP (3x3mm) 8 Ind Reel, 5000 - $0.46 Y  Material Info PCN Purchase
SSM2211CPZ-REEL7 Status: Production 8 ld LFCSP (3x3mm) 8 Ind Reel, 1500 - $0.46 Y  Material Info PCN Purchase
SSM2211SZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $0.48 $0.46 Y  Material Info PCN Purchase
SSM2211SZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $0.46 Y  Material Info PCN Purchase
SSM2211SZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $0.46 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.

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