SSM2537ACBZ-RL

Overview

The SSM2537ACBZ-RL is a mono Class-D audio amplifier with a PDM digital input, delivering 2.7 W into 4 Ω and 1.4 W into 8 Ω at 5.0 V supply. It features an integrated DAC and sigma-delta modulator, eliminating the need for external LC filters. The device operates on a 2.5 V to 5.5 V PVDD supply and a 1.65 V to 1.95 V VDD supply. Key performance metrics include 93% efficiency into 8 Ω, 102 dB SNR, and 0.005% THD+N. It supports 64× or 128× fS sampling rates with configurable gain settings.

Feature Summary

• Integrates a digital-to-analog converter and power amplifier on a single chip for direct PDM interface compatibility.
• Utilizes spread-spectrum pulse density modulation to minimize electromagnetic interference emissions.
• Includes pop-and-click suppression circuitry to reduce audible noise during power state transitions.
• Features smart power-down functionality that activates automatically upon detection of PDM stop conditions.

Applications

• Mobile handsets
• Portable media players

Procurement Notes

Verify the specific ordering suffix (RL vs R7) against the manufacturer's current datasheet to confirm packaging format. Ensure the component meets RoHS compliance requirements as indicated by the Z suffix in the part number. Confirm availability status through authorized distributors, as supply levels may vary.

Selection Notes

Select this amplifier for applications requiring high efficiency and low noise from digital audio sources. The GAIN_FS pin allows configuration for either 3.6 V or 5.0 V operation. Consider the 64× fS mode for lower power consumption or 128× fS if system noise is limited by the source modulator.

Part Context

This component belongs to the SSM2537 series of filterless digital Class-D amplifiers manufactured by Analog Devices Inc. It is designed to replace traditional DAC plus Class-D solutions by combining audio conversion and amplification. The device is specified over the industrial temperature range of −40°C to +85°C.

Replacement Considerations

SSM2537ACBZ-R7 is a verified substitute part number within the same package and specification profile.

FAQ

How does the SSM2537 handle EMI emissions?

It uses proprietary spread-spectrum pulse density modulation technology to minimize radiated emissions, particularly above 100 MHz.

What is the function of the LRSEL pin?

The LRSEL pin selects between left and right time-multiplexed input streams without requiring muting or synchronizing patterns.