ZXCW8100S28TC

Overview

The ZXCW8100S28TC is a 32-bit stereo direct drive digital audio amplifier from Diodes Incorporated (formerly Zetex). It integrates digital-to-analog conversion, filtering, and PWM generation to drive loudspeakers directly. The device supports sampling rates up to 192kHz with oversampling ratios of 768x in single-speed mode. Key electrical parameters include a dynamic range of 101dB, a noise floor of -125dB, and THD+N of 0.021% at 1W into 4Ω. It operates on a 3.3V supply within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates 32-bit digital audio processing with direct PWM output for simplified system design.
• Supports multiple digital audio input formats including I2S, Left Justify, and Right Justify.
• Features proprietary NOVALOAD™ technology for active clipping control and overload management.
• Includes user-configurable digital volume, mute, bass, and treble controls via SPI interface.

Applications

• 5.1 Integrated DVD amplifiers
• Home theater systems
• Mini hi-fi systems
• Automotive audio systems
• PC audio solutions

Procurement Notes

Verify the specific suffix 'TC' against official Diodes Incorporated documentation to confirm tape and reel packaging or temperature grade variations. Ensure the source component matches the 28-pin SSOP package and 3.3V logic requirements. Cross-reference pinouts for SPI enable and mode selection pins to guarantee compatibility with existing host controller designs.

Selection Notes

Select this component for applications requiring high-fidelity digital audio amplification with minimal external components. Consider the 3.3V supply constraint and the need for an external MOSFET H-bridge stage. Evaluate the SPI interface complexity for system integration and ensure the master clock jitter specifications are met by the upstream audio source.

Part Context

This part belongs to the Acoustar™ range of digital audio power devices originally developed by Zetex, now part of Diodes Incorporated. The ZXCW8100 series represents a specialized class of integrated digital amplifiers designed to replace traditional multi-component audio signal chains. It combines high-performance digital filtering with direct drive capabilities.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet. Verify compatibility with legacy Zetex-branded units if sourcing from older inventory channels.

FAQ

What digital audio input formats does the ZXCW8100S28 support?

The device supports 24-bit and 32-bit I2S, Left Justify 24 or 32-bit, and Right Justify 16 or 24-bit formats.

How is the NOVALOAD™ feature configured?

NOVALOAD™ is enabled via the SPI interface register bit NOVLM. It can be set to reduce volume gain during clipping or remove bass boost entirely depending on the NOVLM setting.

What is the maximum supported sampling frequency?

The device supports sampling frequencies up to 192kHz, operating in quad speed mode for these higher rates.