SSM2211S

Overview

The SSM2211S is a low distortion, 1.5 W audio power amplifier manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and delivers 1 W rms into an 8 Ω load or 1.5 W rms into a 4 Ω load. The device features a 4 MHz bandwidth with total harmonic distortion plus noise below 0.2% at 1 W output. It includes a shutdown mode that reduces quiescent current to 1 µA. The component is housed in an 8-lead SOIC narrow body surface-mount package.

Feature Summary

• Bridged-Tied Load (BTL) output configuration eliminates the need for large DC blocking capacitors.
• Shutdown control pin significantly extends battery life by reducing quiescent current drain.
• Unity-gain stable design requires no external compensation capacitors.
• Low differential DC output voltage prevents speaker winding losses.

Applications

• Portable computers
• Hands-free telephones
• Intercom systems
• Talking toys and games

Procurement Notes

Verify the specific suffix 'S' corresponds to the 8-lead SOIC narrow body package variant when ordering. Confirm the revision level matches the required datasheet version. Ensure the operating environment stays within the specified -40°C to +85°C temperature range. Check absolute maximum ratings against system supply voltages to prevent damage.

Selection Notes

Select this component for applications requiring high efficiency and low distortion in a small form factor. The BTL architecture allows for higher power delivery compared to single-ended designs without additional coupling components. Consider thermal resistance values when designing PCB layouts for sustained high-power operation.

Part Context

This part belongs to the SSM2211 family of low distortion audio amplifiers. The 'S' suffix specifically denotes the 8-lead SOIC narrow body package option. Other variants in the series include LFCSP packages which offer improved thermal performance. The device is designed for unregulated battery-powered applications.

Replacement Considerations

SSM2211CPZ

FAQ

Does the SSM2211 require an output coupling capacitor?

No, the bridged output configuration results in zero DC differential voltage across the outputs, eliminating the need for a coupling capacitor.

What is the typical quiescent current in shutdown mode?

The shutdown mode typically reduces the quiescent current drain to 1 µA.