MAX9703, MAX9704 10W Stereo/15W Mono, Filterless, Spread-Spectrum, Class D Amplifiers

Description

The MAX9703/MAX9704 mono/stereo Class D audio power amplifiers provide Class AB amplifier performance with Class D efficiency, conserving board space and eliminating the need for a bulky heatsink. Using a Class D architecture, these devices deliver up to 15W while offering up to 78% efficiency. Proprietary and patent-protected modulation and switching schemes render the traditional Class D output filter unnecessary.

The MAX9703/MAX9704 offer two modulation schemes: a fixed-frequency mode (FFM), and a spread-spectrum mode (SSM) that reduces EMI-radiated emissions due to the modulation frequency. The device utilizes a fully differential architecture, a full bridged output, and comprehensive click-and-pop suppression.

The MAX9703/MAX9704 feature high 80dB PSRR, low 0.07% THD+N, and SNR in excess of 95dB. Short-circuit and thermal-overload protection prevent the devices from being damaged during a fault condition. The MAX9703 is available in a 32-pin TQFN (5mm x 5mm x 0.8mm) package. The MAX9704 is available in a 32-pin TQFN (7mm x 7mm x 0.8mm) package. Both devices are specified over the extended -40°C to +85°C temperature range.

Key Features

Applications/Uses

Filterless Class D Amplifier
Unique Spread-Spectrum Mode Offers 5dB Emissions Improvement Over Conventional Methods
Up to 78% Efficient (R_L = 8Ω)
Up to 88% Efficient (R_L = 16Ω)
15W Continuous Output Power into 8Ω (MAX9703)
2x10W Continuous Output Power into 8Ω (MAX9704)
Low 0.07% THD+N
High PSRR (80dB at 1kHz)
10V to 25V Single-Supply Operation
Differential Inputs Minimize Common-Mode Noise
Pin-Selectable Gain Reduces Component Count
Industry-Leading Click-and-Pop Suppression
Low Quiescent Current (24mA)
Low-Power Shutdown Mode (0.2μA)
Short-Circuit and Thermal-Overload Protection
Available in Thermally Efficient, Space-Saving Packages
- 32-Pin TQFN (5mm x 5mm x 0.8mm)–MAX9703
- 32-Pin TQFN (7mm x 7mm x 0.8mm)–MAX9704

	Automotive
	Desktop PCs
	Hands-Free Car
	LCD Monitors
	LCD Projectors
	LCD TVs
	Phone Adaptors

Key Specifications: Speaker Amplifiers

Part Number

Class

Speaker Amp. V_CC (min) (V)

Speaker Amp. V_CC (max) (V)

Speaker Amp. I_CC (typ) (mA)

P_OUT into 4Ω @ 1% THD+N (W)

P_OUT into 4Ω @ 10% THD+N (W)

P_OUT into 8Ω @ 1% THD+N (W)

P_OUT into 8Ω @ 10% THD+N (W)

Speaker Amp. Half Pwr. THD+N (%)

SNR, A-weighted (dB)

PSRR (db)

Speaker Amp. External Gain

Speaker Amp. Fixed Gain (min) (V/V)

Speaker Amp. Fixed Gain (max) (V/V)

Features

Number of Channels

RoHS Available

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX9703

0.015

4.5

•	Differential Inputs

Yes

THIN QFN/32

$1.75 @ 1k

MAX9704

0.02

$1.95 @ 1k

See All Speaker Amplifiers (29)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-9 of 9

MAX9703

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX9703ETJ

THIN QFN;32 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T3255-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX9703ETJ-T

THIN QFN;32 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T3255-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX9703ETJ+

THIN QFN;32 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T3255+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX9703ETJ+T

THIN QFN;32 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T3255+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX9704

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX9704EVKIT

See data sheet

MAX9704ETJ

THIN QFN;32 pin;50 mm²
Dwg: 21-0144F (PDF)
Use pkgcode/variation: T3277-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX9704ETJ-T

THIN QFN;32 pin;50 mm²
Dwg: 21-0144F (PDF)
Use pkgcode/variation: T3277-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX9704ETJ+

THIN QFN;32 pin;50 mm²
Dwg: 21-0144F (PDF)
Use pkgcode/variation: T3277+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX9704ETJ+T

THIN QFN;32 pin;50 mm²
Dwg: 21-0144F (PDF)
Use pkgcode/variation: T3277+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

Related Products

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