SSM2518CPZ-R7

Overview

The SSM2518CPZ-R7 is a digital input, stereo Class-D audio power amplifier manufactured by Analog Devices Inc. It integrates a DAC and sigma-delta modulator to process serial digital audio directly. The device delivers 2 W into 4 Ω or 1.4 W into 8 Ω at 5 V supply with 1% THD+N. It supports I2C control or standalone operation, features pop-and-click suppression, and operates on PVDD from 2.5 V to 5.5 V and DVDD from 1.62 V to 3.6 V.

Feature Summary

• Filterless architecture utilizing a three-level sigma-delta Class-D modulator for high efficiency and low EMI.
• Integrated digital volume control, dynamic range compression, and de-emphasis filter accessible via I2C interface.
• Comprehensive protection mechanisms including short-circuit, thermal shutdown, and smart power-down upon signal loss.

Applications

• Mobile phones
• Portable media players
• Laptop PCs
• Wireless speakers

Procurement Notes

Verify the specific package type against the datasheet ordering guide, as the SSM2518 family includes both WLCSP and LFCSP variants. Confirm that the CPZ suffix corresponds to the 20-lead LFCSP package required for your design. Ensure compatibility with the intended digital audio interface formats before finalizing procurement.

Selection Notes

Select this component when system noise immunity is critical, as the digital input rejects interference common in analog paths. It is suitable for battery-powered devices due to its high efficiency and programmable low-power modes. Verify that the host processor can provide the necessary master clock and serial data signals within the specified voltage ranges.

Part Context

This part belongs to the SSM2518 series of digital input Class-D amplifiers. It is designed to replace traditional DAC plus analog amplifier solutions by combining conversion and amplification in a single package. The series targets portable electronics requiring high audio quality with minimal external components.

Replacement Considerations

SSM2518CBZ-R7 (WLCSP package variant)

FAQ

How does the SSM2518 handle automatic sample rate detection?

The device automatically detects the incoming sample rate from 8 kHz to 96 kHz without manual configuration, allowing it to adjust internal filtering accordingly.

What is the function of the SAMOD pin?

The SAMOD pin selects between standalone mode (logic high) and I2C control mode (logic low), determining how the amplifier's registers are accessed.