SSM4567ACBZ-RL

Overview

The SSM4567ACBZ-RL is a digital input Class-D power amplifier featuring an integrated boost converter that generates a 5.1 V supply, enabling constant maximum output power across varying battery voltages. It combines an audio DAC, power amplifier, and PDM or PCM (I2S/TDM) interfaces on a single chip. The device delivers 2.5 W into a 4 Ω load and 1.42 W into an 8 Ω load at a 3.6 V supply with less than 1% THD+N. It includes output current, voltage, and VBAT sensing via ADCs, spread-spectrum modulation for low EMI, and operates within the -40°C to +85°C temperature range.

Feature Summary

• Integrated boost regulator provides higher output power than standard battery supplies while maintaining constant performance across voltage ranges.
• Combines audio DAC, power amplifier, and digital audio interfaces to eliminate input coupling capacitors and reduce system noise.
• Includes circuitry for sensing output current, output voltage, and supply voltage, with data available via digital serial ports.
• Features flexible control options including I2C, TDM, PDM patterns, and standalone modes.

Applications

• Mobile handsets
• Tablets
• Portable media players

Procurement Notes

Verify the specific suffix ACBZ against the manufacturer's official ordering guide to confirm package type and tape/reel specifications. Confirm availability status as distribution channels may list obsolete or limited stock items. Ensure the component matches the Rev. 0 datasheet requirements for VBAT and IOVDD supply sequencing during integration.

Selection Notes

Select this component for applications requiring digital audio inputs to minimize analog noise corruption. The integrated boost converter allows driving speakers efficiently from single-cell lithium-ion batteries. Consider the 19-ball WLCSP package constraints for PCB layout. Verify compatibility with host processor interfaces supporting I2S, TDM, or PDM protocols.

Part Context

The SSM4567 belongs to Analog Devices' digital Class-D amplifier family designed for portable electronics. It addresses the need for high-efficiency audio amplification in space-constrained devices by integrating power management and signal processing functions. The device utilizes spread-spectrum pulse density modulation to reduce electromagnetic interference compared to traditional architectures.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.