SSM2335CBZ-REEL

Overview

The SSM2335CBZ-REEL is a fully integrated, high-efficiency mono Class-D audio amplifier from Analog Devices. It utilizes filterless Σ-Δ modulation to minimize external components and reduce EMI emissions. The device operates on a single supply voltage ranging from 2.5 V to 5.5 V. It delivers up to 3 W of continuous output power into a 3 Ω load at 5.0 V with less than 1% total harmonic distortion plus noise (THD+N). Key electrical specifications include a signal-to-noise ratio of 96 dB, an efficiency of 93% at 1.4 W into an 8 Ω load, and a shutdown current of 20 nA. The default closed-loop gain is fixed at 18 dB.

Feature Summary

• Filterless design using spread-spectrum Σ-Δ modulation eliminates the need for output filters and oscillator synchronization in multi-amplifier systems.
• Integrated pop-and-click suppression circuitry minimizes audible transients during power-up and power-down sequences.
• Built-in protection mechanisms include thermal shutdown and short-circuit protection to ensure device reliability under fault conditions.
• Fully differential input architecture provides excellent rejection of common-mode noise without requiring input coupling capacitors when biased correctly.

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required packaging format, as Analog Devices offers REEL, REEL7, and R21 options for this component. Confirm RoHS compliance status if environmental regulations apply to your manufacturing process. Ensure the temperature range specification meets your operational environment requirements before finalizing procurement decisions.

Selection Notes

Select this amplifier for applications requiring minimal board space due to its filterless architecture and small WLCSP package. Consider the 18 dB default gain or user-adjustable gain settings based on input signal levels. Evaluate the 2.5 V to 5.5 V supply range compatibility with your system's battery or power rail. Verify that the 3 W output capability aligns with your speaker impedance and desired volume levels.

Part Context

The SSM2335 belongs to Analog Devices' portfolio of high-efficiency Class-D audio amplifiers designed for mobile and portable consumer electronics. It shares architectural similarities with other SSM series amplifiers but is optimized for single-channel mono applications. The device integrates advanced modulation techniques to address EMI concerns common in compact digital audio designs.

Replacement Considerations

SSM2335CBZ-R21

FAQ

Does the SSM2335 require an output filter?

No, the SSM2335 uses a filterless design that relies on the inherent inductance of the speaker coil and the natural filtering of the human ear to recover the audio signal.

How is the gain configured on the SSM2335?

The device has a default fixed gain of 18 dB. Users can reduce the gain by adding external resistors connected to the appropriate pins.

What is the purpose of the SD pin?

The SD pin is the shutdown input. Applying a logic low to this pin activates the ultralow shutdown mode, reducing the supply current to approximately 20 nA.