SSM2211SZ

Overview

The SSM2211SZ is a low distortion, Class-AB audio power amplifier manufactured by Analog Devices Inc. It delivers 1 W RMS into an 8 Ω bridge-connected load or 1.5 W RMS into a 4 Ω load. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and functions down to 1.75 V for battery applications. It features a 4 MHz bandwidth, less than 0.2% THD+N at 1 W output, and excellent power supply rejection. The component is housed in an 8-lead SOIC narrow body surface-mount package.

Feature Summary

• Delivers high-fidelity audio with total harmonic distortion plus noise below 0.2% at 1 W output.
• Operates efficiently on a single supply voltage between 2.7 V and 5.5 V.
• Features a shutdown mode that reduces quiescent current drain to approximately 100 nA.
• Utilizes a differential output configuration that eliminates the need for large DC blocking capacitors.

Applications

• Portable computers
• Personal wireless communicators
• Hands-free telephones
• Speaker phones
• Intercoms

Procurement Notes

Verify the specific suffix 'SZ' indicates the 8-lead SOIC narrow body package variant when sourcing. Confirm RoHS compliance status and lead-free soldering specifications against the latest manufacturer documentation prior to implementation. Ensure thermal management aligns with the specified junction temperature limits for the chosen PCB layout.

Selection Notes

Select this component for designs requiring low distortion audio amplification in space-constrained portable devices. The single-supply operation simplifies power architecture compared to dual-rail solutions. Consider the thermal resistance characteristics of the SOIC package when determining heat dissipation requirements relative to ambient operating temperatures.

Part Context

This part belongs to the SSM2211 family of low distortion audio power amplifiers. The 'S' suffix denotes the 8-lead SOIC package, while other variants like the CP suffix utilize LFCSP packaging. The series is designed for unregulated battery-powered applications where efficiency and sound quality are critical.

Replacement Considerations

SSM2211CPZ

FAQ

Does the SSM2211 require external compensation capacitors?

No, the SSM2211 is unity-gain stable and does not require external compensation capacitors.

What is the purpose of connecting Pin 2 to Pin 3?

Connecting Pin 2 (Bypass) to Pin 3 (Noninverting Input) provides the necessary offset voltage for single-supply operation.