MAX9879ERV+CEP

Audio Amplifiers Overview

The MAX9879ERV+CEP is a stereo Class D audio subsystem with a DirectDrive headphone amplifier. It operates on a single supply from 2.7V to 5.5V and delivers up to 715mW into an 8Ω load at 3.7V, achieving 88% efficiency. The integrated headphone amplifier provides 58mW into a 16Ω load. Key electrical parameters include 0.04% THD+N for the speaker amplifier and 0.018% THD+N for the headphone amplifier at 1kHz. The device features I2C control, programmable preamplifier gains of 0dB, +5.5dB, or +20dB, and utilizes a 30-bump UCSP package.

Audio Amplifiers Feature Summary

• Integrates a high-efficiency stereo Class D power amplifier with active emissions limiting technology to reduce EMI without output filters.
• Features a capacitor-less DirectDrive headphone amplifier that produces a ground-referenced output from a single supply.
• Includes a user-defined input architecture with an input mixer, volume control, and comprehensive click-and-pop suppression.
• Supports hardware and software shutdown modes along with a bypass feature allowing external amplifiers to drive speakers.

Audio Amplifiers Applications

• Cell Phones
• Portable Multimedia Players

Audio Amplifiers Procurement Notes

Verify the specific suffix 'ERV+CEP' against official manufacturer documentation to confirm exact packaging and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements as indicated by the '+' designation. Confirm availability status directly with authorized distributors, as stock levels fluctuate. Validate the operating temperature range of -40°C to +85°C matches your system design constraints before finalizing procurement.

Audio Amplifiers Selection Notes

Select this component when space-constrained portable designs require both speaker and headphone amplification in a single IC. The UCSP package offers a compact footprint suitable for mobile devices. Consider the I2C interface for digital volume and mode control if microcontroller integration is required. Evaluate the low RF susceptibility features if the design operates near GSM radios.

Audio Amplifiers Part Context

The MAX9879 belongs to Maxim Integrated's portfolio of audio subsystems designed for mobile applications. It combines Class D efficiency with Class AB sound quality. The UCSP (Ultra-Close-Space Package) minimizes board area compared to traditional QFN packages. This integration reduces bill-of-materials count by eliminating external filter components and DC-blocking capacitors.

Audio Amplifiers Replacement Considerations

Consult official Analog Devices/Maxim Integrated documentation for verified direct replacements. Cross-reference pinouts and electrical characteristics carefully. Generic substitutes may not support the specific DirectDrive architecture or I2C register map.

Audio Amplifiers FAQ

How does the MAX9879 handle electromagnetic interference?

It uses a filterless modulation scheme combined with active emission limiting circuitry and spread-spectrum modulation to significantly reduce EMI, eliminating the need for traditional output filtering components.

What is the function of the BYPASS mode?

The bypass mode disables the integrated Class D amplifier and uses an internal DPST switch to allow an external amplifier to drive the speaker connected to the MAX9879 outputs.

Can the input signals be configured differentially?

Yes, the inputs can be configured for either single-ended or differential signals, and the internal preamplifiers offer three programmable gain settings: 0dB, +5.5dB, and +20dB.