SSM2317CBZ-REEL7

Overview

The SSM2317CBZ-REEL7 is a fully integrated, single-channel Class-D audio amplifier designed for portable electronics. It delivers up to 3 W into a 3 Ω load and 1.4 W into an 8 Ω load at a 5.0 V supply voltage, achieving a signal-to-noise ratio of 93 dB. The device operates on a single supply ranging from 2.5 V to 5.5 V and features ultralow shutdown current of 20 nA. Utilizing spread-spectrum Σ-Δ modulation, it eliminates the need for output filters while minimizing electromagnetic interference. The component includes built-in thermal protection, short-circuit protection, and pop-and-click suppression.

Feature Summary

• Filterless design utilizing spread-spectrum Sigma-Delta modulation to reduce external component count and minimize radiated EMI emissions.
• Integrated automatic level control (ALC) that improves dynamic range and prevents clipping by adjusting gain based on input stimulus.
• Built-in pop-and-click suppression circuitry to minimize audible transients during power-up and power-down sequences.
• Micropower shutdown mode with typical current consumption of 20 nA, activated via a logic low digital input.

Applications

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

Procurement Notes

Verify the specific ordering suffix REEL7 against manufacturer documentation to confirm tape-and-reel packaging specifications. Ensure compatibility with the 9-ball WLCSP footprint dimensions. Confirm RoHS compliance status through official datasheets prior to integration. Validate that the supply voltage range aligns with system requirements.

Selection Notes

Select this component for applications requiring high efficiency in space-constrained designs due to its filterless architecture. Consider the default 18 dB gain or user-adjustable settings when designing input circuits. Evaluate the ALC functionality if dynamic range optimization and speaker protection are critical. Verify thermal dissipation capabilities relative to the PCB layout and copper weight used.

Part Context

The SSM2317 belongs to Analog Devices' portfolio of high-efficiency Class-D audio amplifiers optimized for mobile phone applications. It is part of a series designed to maximize performance while minimizing board space. The CBZ-REEL7 designation indicates the specific package type and reel quantity configuration for surface-mount assembly.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

Does the SSM2317 require an output filter?

No, the SSM2317 utilizes a filterless modulation scheme that relies on the inherent inductance of the speaker coil and natural filtering to recover the audio component.

How is the gain configured?

The device has a default fixed gain of 18 dB, which can be reduced using a pair of external resistors connected to the gain setting pins.