MAX9796

2.3W, High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers

Industry's Smallest Audio Subsystem, Improved Class D Output Power with Integrated DirectDrive Headphone Amplifiers, 3D Sound Enhancement Sound, and 3-Input with Mixing/Mux

Data Sheet (Rev. 1)

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Overview

Unique Spread-Spectrum Modulation and Active Emissions Limiting Significantly Reduces EMI
Up to 3 Stereo Inputs
2.3W Mono Speaker Output (4Ω, V_DD = 5V)
50mW Mono Receiver/Stereo Headphone Outputs (32Ω, V_DD = 3.3V)
High PSRR (68dB at 217Hz)
80% Efficiency (V_DD = 3.3V, R_L = 8Ω, P_OUT = 600mW)
I²C Control—Input Configuration, Volume Control, Output Mode
Click-and-Pop Suppression
Low Total Harmonic Distortion (0.03% at 1kHz)
Current-Limit and Thermal Protection
Available in Space-Saving, 36-Bump UCSP (3mm x 3mm)

The MAX9796 combines a high-efficiency Class D, mono audio power amplifier with a mono DirectDrive® receiver amplifier and a stereo DirectDrive headphone amplifier.

Maxim's 3rd-generation, ultra-low EMI, Class D audio power amplifiers provide Class AB performance with Class D efficiency. The MAX9796 delivers 2.3W into a 4Ω load from a 5V supply and offers efficiencies up to 80%. Active emissions limiting circuitry and spread-spectrum modulation greatly reduce EMI, eliminating the need for output filtering found in traditional Class D devices.

The MAX9796 features a fully differential architecture, a full-bridged output, and comprehensive click-and-pop suppression. The device utilizes a flexible, user-defined mixer architecture that includes an input mixer, volume control, and output mixer. All controls are done through an I²C interface.

The mono receiver amplifier and stereo headphone amplifier use Maxim's DirectDrive architecture, that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, space, and component height.

The MAX9796 is available in a 36-bump UCSP™ (3mm x 3mm) package and is specified over the extended -40°C to +85°C temperature range.

Applications

Cell Phones
Handheld Gaming Consoles
Portable Multimedia Players

Documentation

Data Sheet 1

MAX9796: 2.3W, High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers Data Sheet (Rev.1) 01/18/2008

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Audio Amplifiers 2
MAX9702		1.8W, Filterless, Stereo, Class D Audio Power Amplifier and DirectDrive Stereo Headphone Amplifier
MAX9770		1.2W, Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers

Evaluation Kits

Evaluation Kit for the MAX9796

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Features and Benefits

2.3W Speaker Output (4Ω, V_DD = 5V)
50mW DirectDrive Headphone Amplifier
Highly Programmable Input and Output Modes
Controlled Through USB
Proven PCB Layout
Windows 2000/XP/Vista (32-Bit)-Compatible Evaluation Software
Fully Assembled and Tested

Product Details

The MAX9796 evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) that evaluates the MAX9796 ultra-low EMI, 2.3W filterless Class D audio power amplifier with 50mW DirectDrive® headphone amplifier. The MAX9796 EV kit offers highly programmable and flexible input and output routing, which allows many combinations of balanced and single-ended signals to be connected. The MAX9796 EV kit also includes Windows 2000/XP/Vista® (32-bit)-compatible software that provides a simple graphical user interface (GUI) for exercising the MAX9796's features.