BU7839GVW-E2

Audio Amplifiers Overview

The BU7839GVW-E2 is a digital input Class-D headphone amplifier manufactured by ROHM Semiconductor. It integrates stereo audio DAC and headphone amplifier functions for direct digital audio playback. The device operates with an analog supply voltage (AVDD) of 2.5V to 3.0V, a digital core supply (DVDD) of 1.35V to 1.65V, and a digital IO supply (DVDDIO) up to 3.0V. It supports sampling frequencies from 8kHz to 48kHz and accepts 16, 18, or 24-bit data formats via serial audio interfaces. The component features a built-in PLL, digital volume control, and soft mute functions.

Audio Amplifiers Feature Summary

• Integrates stereo audio DAC and Class-D headphone amplifier for efficient digital audio processing
• Includes built-in digital volume control allowing separate left and right channel adjustment
• Features startup sound reduction circuits and soft mute capabilities to minimize popping noises
• Supports master/slave modes with a built-in PLL for flexible clock synchronization

Audio Amplifiers Applications

• Digital audio playback systems requiring low power consumption
• Portable electronic devices utilizing digital audio sources
• Headphone amplifiers integrated with digital signal processors

Audio Amplifiers Procurement Notes

Verify the specific ordering suffix E2 corresponds to the embossed tape and reel packaging format as defined in the official documentation. Confirm that the ADR terminal configuration matches the required 2wire CPU I/F device address selection for your system design. Ensure all power supply rails adhere strictly to the recommended operating ranges specified in the datasheet to guarantee proper functionality.

Audio Amplifiers Selection Notes

Select this component when a combined DAC and amplifier solution is needed to reduce system complexity. It is suitable for designs requiring independent digital volume control and compatibility with standard serial audio interfaces. Consider the SBGA024W040 package dimensions and thermal characteristics during PCB layout planning. Verify that the host processor can provide the necessary MCLK, BCLK, and LRCLK signals within the specified frequency limits.

Audio Amplifiers Part Context

This part belongs to ROHM's lineup of digital input Class-D headphone amplifiers. It is designed to replace discrete DAC and amplifier combinations in portable audio applications. The integration of interpolation and delta-sigma modulation allows for direct connection to digital audio sources without external DAC components.

Audio Amplifiers Replacement Considerations

Check for updated ROHM product codes if the current model status changes. Consult official substitution lists for pin-compatible alternatives with similar electrical specifications.

Audio Amplifiers FAQ

What are the selectable device addresses for the 2wire CPU interface?

The device address is selectable between 33h and 36h based on the logic level of the ADR terminal.

How does the device handle startup sounds?

It includes a built-in start-up sound reduction circuit and a transistor for mute to reduce popping sounds during the ramp-up period.