SSM2315CBZ-REEL

Overview

The SSM2315CBZ-REEL is a mono Class-D audio amplifier from Analog Devices. It operates on a single supply voltage ranging from 2.5 V to 5.5 V. The device delivers up to 3 W of output power into a 3 Ω load and 1.4 W into an 8 Ω load at 5.0 V. It features a 103 dB signal-to-noise ratio and utilizes Σ-Δ modulation for filterless operation. The shutdown current is typically 20 nA, and it includes pop-and-click suppression.

Feature Summary

• Filterless design using Sigma-Delta modulation eliminates the need for external output filters.
• Integrated pop-and-click suppression minimizes audible transients during power-up and power-down.
• Micropower shutdown mode reduces standby consumption to approximately 20 nA.
• Built-in thermal shutdown and short-circuit protection ensure operational reliability.

Applications

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

Procurement Notes

Verify the specific reel quantity suffix (e.g., REEL vs REEL7) against the manufacturer's ordering guide to confirm packaging configuration. Ensure the component meets RoHS compliance requirements as indicated by the Z suffix in the part number. Cross-reference the datasheet revision A specifications with your system requirements before finalizing procurement decisions.

Selection Notes

Select this amplifier for applications requiring high efficiency and minimal external components. The default fixed gain is 6 dB, but user-adjustable gain settings are available via external resistors. Verify that the input signal bias falls within the recommended common-mode range to potentially omit input coupling capacitors. Ensure PCB layout guidelines are followed to maintain optimal performance and minimize EMI emissions.

Part Context

This component belongs to the SSM2315 series of high-efficiency, mono Class-D audio amplifiers. It is designed specifically for mobile phone applications and portable electronics where board space is limited. The device integrates a fully differential input stage and a spread-spectrum pulse density modulator to reduce electromagnetic interference.

Replacement Considerations

SSM2315CBZ-R21 and SSM2315CBZ-REEL7 are confirmed substitutes within the same package and temperature range.

FAQ

Does the SSM2315 require an external output filter?

No, the SSM2315 uses a filterless Sigma-Delta modulation scheme that relies on the speaker coil inductance and natural filtering.

How can the gain be adjusted?

The default gain is 6 dB. Users can reduce the gain by connecting a pair of external resistors to the gain control pins.