MAX9791

PRODUCTION

Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers

36% Smaller, 68% More Efficient—Industry's First Class D Vista-Compliant Notebook Audio Subsystem

Data Sheet (Rev. 1) Product Selection Table

Part Models: 5
1ku List Price: Starting From $1.89

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Overview

Windows Vista® Premium Compliant
Low EMI Filterless Class D Speaker Amplifiers Pass EN55022B Emissions Limit with 30cm of Speaker Cable
180mW DirectDrive Headphone Amplifier
Excellent RF Immunity
Integrated 120mA LDO
Eliminates Headphone Ground Loop Noise
Wake-on-Beep Function
Click-and-Pop Suppression
Short-Circuit and Thermal-Overload Protection
Thermally Efficient, Space-Saving Package
- 28-Pin TQFN-EP (4mm x 4mm x 0.75mm)

The MAX9791 combines a stereo 2W Class D power amplifier, a stereo 180mW DirectDrive® headphone amplifier, and a 120mA low-dropout (LDO) linear regulator in a single device. The MAX9792 combines a mono 3W Class D power amplifier, a stereo 180mW DirectDrive headphone amplifier, and a 120mA LDO linear regulator in a single device.

The MAX9791/MAX9792 feature Maxim's DirectDrive headphone amplifier architecture that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height. High 107dB DC PSRR and low 0.006% THD+N ensure clean, low-distortion amplification of the audio signal.

The ground sense feature senses and corrects for the voltage difference between the output jack ground and device signal ground. This feature minimizes headphone amplifier crosstalk by sensing the impedance in the ground return trace and correcting for it at the output jack. This feature also minimizes ground-loop noise when the output socket is used as a line out connection to other grounded equipment (for example, a PC connected to a home hi-fi system).

The MAX9791/MAX9792 feature low RF susceptibility, allowing the amplifiers to successfully operate in close proximity to wireless applications. The MAX9791/MAX9792 Class D amplifiers feature Maxim's spread-spectrum modulation and active emissions limiting circuitry. Industry-leading click-and-pop suppression eliminates audible transients during power-up and shutdown cycles.

The MAX9791/MAX9792 wake-on-beep feature wakes up the speaker and headphone amplifiers when a qualified beep signal is detected at the BEEP input.

For maximum flexibility, separate speaker and headphone amplifier control inputs provide independent shutdown of the speaker and headphone amplifiers. Additionally the LDO can be enabled independently of the audio amplifiers.

The MAX9791/MAX9792 feature thermal-overload and output short-circuit protection. The devices are available in 28-pin TQFN packages and are specified over the -40°C to +85°C extended temperature range.

Applications

Notebook Computers
Portable Multimedia Players
Tablet PCs

Part Models: 5
1ku List Price: Starting From $1.89

Documentation

Data Sheet 1

MAX9791-MAX9792: Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers Data Sheet (Rev.1) 08/17/2010

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX9791AETI+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX9791AETI+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX9791BETI+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX9791BETI+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX9791CETI+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 20, 2016 - 1612 ASSEMBLY
		pcn_1612
MAX9791AETI+	PRODUCTION
MAX9791AETI+T	PRODUCTION
MAX9791BETI+	PRODUCTION

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

Software Resources

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Evaluation Kits

Evaluation Kit for the MAX9791A

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Features and Benefits

No DC-Blocking Output Capacitors Required at Headphone Output
Speaker and Headphone Operation
- Speaker: 2W Stereo Output
- Headphone: 180mW DirectDrive Stereo Output
Wake-on-Beep Function
120mA, 4.75V LDO
Lead-Free and RoHS Compliant
Fully Assembled and Tested

Product Details

The MAX9791A evaluation kit (EV kit) demonstrates the MAX9791A IC, which combines a stereo Class D power amplifier, a DirectDrive® stereo headphone amplifier, and a 120mA, 4.75V low-dropout regulator (LDO) for notebook, tablet PC, and portable media player applications. Maxim's DirectDrive technology eliminates the need for bulky DC-blocking capacitors at the output of the headphone amplifier.

The EV kit is configured for a 12dB speaker amplifier gain and a 0dB headphone amplifier gain. It is designed to operate from a 4.5V to 5.5V speaker supply and an optional separate 2.7V to 5.5V headphone supply. The EV kit is capable of delivering up to 2W into a pair of 4Ω speakers and 180mW into a 32Ω headphone load.

Applications

Notebook Computers
Portable Multimedia Players
Tablet PCs

Evaluation Kit for the MAX9792A

Buy Now View Details

Features and Benefits

No DC-Blocking Output Capacitors Required at Headphone Output
Speaker and Headphone Operation
- Speaker: 3W Mono Class D Output
- Headphone: 180mW Stereo DirectDrive Output
Wake-on-Beep Function
120mA, 4.75V LDO
Lead(Pb)-Free and RoHS Compliant
Fully Assembled and Tested

Product Details

The MAX9792A evaluation kit (EV kit) demonstrates the MAX9792A IC, which combines a mono Class D power amplifier, a DirectDrive® stereo headphone amplifier, and a 120mA, 4.75V low-dropout regulator (LDO) for notebook, tablet PC, and portable media player applications. Maxim's DirectDrive technology eliminates the need for bulky DC-blocking capacitors at the output of the headphone amplifier.

The EV kit is configured for a 12dB speaker amplifier gain and a 0dB headphone amplifier gain. It is designed to operate from a 4.5V to 5.5V speaker supply and an optional separate 2.7V to 5.5V headphone supply. The EV kit is capable of delivering up to 3W into a 3Ω speaker and 180mW into a 32Ω headphone load.

Applications

Notebook Computers
Portable Multimedia Players
Tablet PCs

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Overview

Documentation

Data Sheet 1

Software Resources

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Evaluation Kits

Features and Benefits

Product Details

Features and Benefits

Product Details

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