SSM2211S: High-Performance Audio Power Amplifier IC by Analog Devices

The SSM2211S from Analog Devices Inc. is a highly regarded Class AB mono audio power amplifier integrated circuit (IC) that delivers exceptional sound quality in compact designs. Although now classified as obsolete, this amplifier remains popular for legacy systems and DIY audio projects. This in-depth guide covers everything you need to know about the SSM2211S IC.

Detailed Product Overview

Manufacturer and Specifications

• Manufacturer: Analog Devices Inc. (A leading semiconductor company)
• Part Number: SSM2211S
• Category: Integrated Circuits (ICs) > Linear - Amplifiers - Audio
• Status: Obsolete (Still available through distributors)

Technical Specifications

Amplifier Characteristics

• Type: Class AB (Offers excellent linearity and efficiency)
• Output Configuration: 1-Channel (Mono)
• Output Power: 1.5W x 1 @ 4 (Ideal for small speakers/headphones)
• Supply Voltage Range: 2.7V to 5.5V (Perfect for battery-powered devices)

Key Features

• Differential Inputs (Reduces noise and improves signal integrity)
• Shutdown Mode (Enables power saving when inactive)
• Surface Mount Package (8-SOIC for compact PCB design)
• Wide Operating Temperature Range

Package Information

• Package Type: 8-SOIC
• Dimensions: 3.90mm Width
• Mounting Style: Surface Mount Technology (SMT)

Comprehensive Applications

The SSM2211S is ideal for various audio applications including:

• Portable audio players and MP3 accessories
• Battery-powered speaker systems
• Compact audio amplifiers
• Intercom and public address systems
• Automotive audio subsystems
• Educational electronics projects

Why Choose SSM2211S?

Despite being obsolete, the SSM2211S offers several advantages:

• Proven reliability from Analog Devices
• Excellent audio quality with low distortion
• Flexible power supply options
• Compact form factor for space-constrained designs
• Backward compatibility with existing designs

Alternatives and Cross-References

For designers considering alternatives, these ICs may be suitable:

• ADAU1701 from Analog Devices
• TPA2005D1 from Texas Instruments
• MAX98306 from Maxim Integrated

Design Considerations

When implementing the SSM2211S in your design:

• Ensure proper heat dissipation for optimal performance
• Use high-quality audio components in the signal path
• Consider power supply decoupling for noise reduction
• Follow Analog Devices' recommended layout guidelines

Where to Buy SSM2211S

While no longer in production, the SSM2211S can still be sourced through:

• Authorized Analog Devices distributors
• Electronics component brokers
• Online marketplaces specializing in obsolete parts

Conclusion

The SSM2211S remains a valuable audio amplifier IC for specific applications, offering excellent performance in a compact package. Its combination of Class AB efficiency, differential inputs, and shutdown capability makes it particularly useful for battery-powered audio devices. While newer alternatives exist, the SSM2211S continues to be a preferred choice for certain legacy designs and specialized applications.

For engineers and hobbyists working with audio systems, understanding the capabilities and limitations of the SSM2211S can help in making informed design decisions. Whether you're maintaining existing equipment or creating new designs with available stock, this IC delivers reliable audio amplification performance.