SSM2517CBZ-R7

Overview

The SSM2517CBZ-R7 is a mono Class-D audio amplifier with PDM digital input, delivering 2.4 W into 4 Ω and 1.38 W into 8 Ω at 5.0 V supply. It features 92% efficiency into 8 Ω, 85 dB PSRR at 217 Hz, and 0.035% THD+N at 100 mW output. The device operates from a 2.5 V to 5.5 V PVDD supply and 1.62 V to 3.6 V VDD supply. It supports 64× or 128× fS sampling rates, includes pop-and-click suppression, and utilizes spread-spectrum modulation for low EMI.

Feature Summary

• Integrates an audio DAC, power amplifier, and PDM interface on a single chip to reduce system noise.
• Uses closed-loop three-level sigma-delta modulation for high efficiency and excellent audio performance without external LC filters.
• Includes smart power-down and standby modes triggered by PDM stop conditions or clock loss.
• Features user-selectable ultralow EMI emissions mode via specific PDM watermarking patterns.

Applications

• Mobile handsets
• Portable media players

Procurement Notes

Verify the component matches the exact Analog Devices part number SSM2517CBZ-R7. Confirm the package type is the 9-ball WLCSP and the temperature range is industrial (-40°C to +85°C). Ensure the datasheet revision is current. Check for authenticity through authorized channels to avoid counterfeits.

Selection Notes

Select this amplifier for applications requiring digital audio input to minimize analog noise corruption. It is suitable for power-sensitive designs due to its high efficiency and low quiescent power consumption. Consider the 9-ball WLCSP package for space-constrained layouts. Verify compatibility with the system's PDM clock rates and voltage levels.

Part Context

The SSM2517 is part of Analog Devices' Class-D audio amplifier family. It is designed to replace traditional DAC plus Class-D solutions by integrating the digital-to-analog conversion directly on the amplifier chip. This integration simplifies the design and improves performance in noisy environments typical of mobile devices.

Replacement Considerations

SSM2518CBZ-R7 (Stereo version)

FAQ

How is the gain and sample rate configured?

The GAIN_FS pin sets the internal gain and filtering configuration for different sample rates. It can be tied to PVDD or PGND to select between 64× or 128× fS operation and optimized gain settings for 3.6 V or 5 V supplies.

What triggers the smart power-down mode?

Smart power-down is enabled automatically when the device detects a PDM stop condition (at least 128 repeated 0xAC bytes) or when no clock input is detected.