SSM2305RMZ-REEL

Overview

The SSM2305RMZ-REEL is a mono Class-D audio amplifier from Analog Devices Inc., packaged in an 8-lead Mini Small Outline Package (MSOP). It delivers 2.8 W into a 4 Ω load and 1.6 W into an 8 Ω load at a 5.0 V supply with less than 10% THD+N. The device operates on a single supply ranging from 2.5 V to 5.5 V, featuring a default closed-loop gain of 18 dB and a signal-to-noise ratio exceeding 98 dB. It incorporates Σ-Δ modulation for filterless operation, ultralow shutdown current, and pop-and-click suppression.

Feature Summary

• Filterless design utilizing Sigma-Delta modulation eliminates the need for external LC output filters.
• Integrated pop-and-click suppression minimizes audible transients during power-up and power-down cycles.
• Built-in protection mechanisms include thermal shutdown and short-circuit protection for enhanced reliability.
• Spread-spectrum pulse density modulation reduces electromagnetic interference emissions.

Applications

• Mobile phones
• MP3 players
• Portable gaming devices
• Educational toys

Procurement Notes

Verify the specific package option matches the required footprint, as the SSM2305 series includes both LFCSP and MSOP variants. Confirm RoHS compliance status indicated by the 'Z' suffix in the ordering guide. Ensure the selected reel quantity aligns with production volume requirements. Cross-reference the manufacturer's latest datasheet revision for any updates to absolute maximum ratings or thermal characteristics before finalizing procurement specifications.

Selection Notes

Select this component when board space constraints preclude the use of bulky output filters. The fixed 18 dB gain is suitable for direct digital-to-analog interface applications; utilize external resistors if lower gain is required. Verify that the system power supply remains within the 2.5 V to 5.5 V operational range. Consider the thermal resistance of the MSOP package when designing heat dissipation paths for high-power continuous operation scenarios.

Part Context

This part belongs to the SSM2305 family of high-efficiency, mono Class-D audio amplifiers designed for mobile phone applications. The RMZ suffix specifically denotes the 8-lead Mini Small Outline Package variant, distinguishing it from the Lead Frame Chip Scale Package options available within the same product line.

Replacement Considerations

SSM2305CPZ-REEL7

FAQ

Does the SSM2305 require external input coupling capacitors?

Input coupling capacitors are optional if the DC input common-mode voltage is approximately VDD/2. They are required if the input signal is not biased within the recommended range or if high-pass filtering is needed.

How is the amplifier gain configured?

The default closed-loop gain is 18 dB. Users can reduce the gain by connecting a pair of external resistors according to the formula provided in the datasheet.