SSM2319CBZ-R2

Overview

The SSM2319CBZ-R2 is a fully integrated, high-efficiency mono Class-D audio amplifier manufactured by Analog Devices Inc. It utilizes ultra-efficient spread-spectrum Σ-Δ modulation to eliminate the need for external LC output filters. The device operates from a single supply voltage ranging from 2.5 V to 5.5 V. At a 5.0 V supply, it delivers 3 W of continuous output power into a 3 Ω load and 1.4 W into an 8 Ω load, maintaining total harmonic distortion below 1%. Key performance metrics include a signal-to-noise ratio of 98 dB and efficiency reaching 90% at 1.4 W into an 8 Ω speaker. It features ultralow shutdown current of 20 nA, pop-and-click suppression, and internal modulator synchronization.

Feature Summary

• Filterless design using spread-spectrum Σ-Δ modulation to reduce electromagnetic interference emissions without external output filters.
• Internal modulator synchronization (SYNC) capability to prevent clock intermodulation when multiple amplifiers are used in close proximity.
• Integrated pop-and-click suppression circuitry to minimize audible transients during power-up and power-down sequences.
• Built-in thermal shutdown and output short-circuit protection with autorecovery functionality.

Applications

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

Procurement Notes

Verify the specific ordering suffix R2 against the manufacturer's official documentation to confirm tape and reel packaging specifications. Ensure compatibility with the required industrial temperature range of −40°C to +85°C. Confirm that the 9-ball WLCSP package dimensions align with the target PCB footprint constraints. Cross-reference the datasheet revision history to ensure all electrical parameters match the intended design requirements.

Selection Notes

Select this component for applications requiring high efficiency and minimal external component count in portable electronics. The filterless architecture significantly reduces board space and system cost compared to traditional PWM Class-D amplifiers. Consider the default 12 dB gain or user-adjustable settings via external resistors. Evaluate the SYNC feature if designing systems with multiple audio channels to mitigate potential beating effects.

Part Context

The SSM2319 belongs to Analog Devices' portfolio of high-efficiency Class-D audio amplifiers designed for mobile phone applications. It is part of a family of filterless amplifiers that utilize proprietary Σ-Δ modulation techniques. The device is housed in a compact 9-ball, 1.5 mm × 1.5 mm wafer level chip scale package (WLCSP), optimizing space for handheld consumer electronics.

Replacement Considerations

SSM2317CBZ-R2

FAQ

Does the SSM2319 require external LC output filters?

No, the SSM2319 uses a filterless modulation scheme that relies on the inherent inductance of the speaker coil and the natural filtering of the speaker and human ear to recover the audio signal.

How is the shutdown mode activated?

Shutdown is enabled by applying a logic low signal to the SD pin, resulting in an ultralow shutdown current of typically 20 nA.

What is the purpose of the SYNC pins?

The SYNC pins allow for internal modulator synchronization to prevent clock intermodulation (beating effect) when multiple amplifiers are placed in close proximity within the same system.