SSM2305RMZ-REEL7

Overview

The SSM2305RMZ-REEL7 is a mono Class-D audio amplifier manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.5 V to 5.5 V and delivers up to 2.8 W into a 4 Ω load or 1.6 W into an 8 Ω load at 5.0 V. The device utilizes Σ-Δ modulation, eliminating the need for external LC output filters. Key electrical parameters include a signal-to-noise ratio of 98 dB, a default closed-loop gain of 18 dB, and a shutdown current of 20 nA. It functions within a temperature range of -40°C to +85°C and is housed in an 8-lead MSOP package.

Feature Summary

• Filterless design utilizing Sigma-Delta modulation to reduce electromagnetic interference and board space requirements.
• Integrated pop-and-click suppression circuitry to minimize audible transients during power-up and power-down cycles.
• Micropower shutdown mode with ultralow standby current consumption for extended battery life in portable devices.
• Built-in thermal shutdown and short-circuit protection mechanisms to ensure operational reliability.

Applications

• Mobile phones
• MP3 players
• Portable gaming devices

Procurement Notes

Verify that the ordering suffix matches the required packaging format. Confirm the package type corresponds to the Mini Small Outline Package variant. Ensure the component meets RoHS compliance standards as indicated by the Z suffix. Cross-reference the manufacturer part number with official distributor catalogs to validate authenticity and revision status before procurement.

Selection Notes

Select this amplifier for applications requiring high efficiency without external output filtering. Consider the fixed 18 dB gain or user-adjustable configurations based on input signal levels. Evaluate the thermal resistance characteristics relative to the PCB layout constraints. Ensure the supply voltage range aligns with the system's power architecture and battery specifications.

Part Context

This component belongs to the SSM2305 series of filterless Class-D audio amplifiers. It is designed specifically for mobile phone applications where maximizing performance while minimizing external component count is critical. The series offers high efficiency across various load conditions and supply voltages, making it suitable for space-constrained portable electronics.

Replacement Considerations

SSM2305CPZ-R2

FAQ

Does the SSM2305 require external LC output filters?

No, the SSM2305 uses a filterless Sigma-Delta modulation scheme that relies on the speaker coil inductance and natural filtering.

How can the gain of the amplifier be adjusted?

The default gain is 18 dB but can be reduced using a pair of external resistors connected to the gain control pins.