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Data Sheet

FULL DATA SHEET (PDF, 400kB) Download   E-Mail

Description

The MAX9724A/MAX9724B stereo headphone amplifiers are designed for portable equipment where board space is at a premium. These devices use a unique, patented† DirectDrive™ architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height. The MAX9724 suppresses RF radiation received by input and supply traces acting as antennas and prevents the amplifier from demodulating the coupled noise. The MAX9724A offers an externally adjustable gain while the MAX9724B has an internally preset gain of -1.5V/V. The MAX9724A/MAX9724B deliver up to 60mW per channel into a 32Ω load and have low 0.02% THD+N. An 80dB at 1kHz power-supply rejection ratio (PSRR) allows these devices to operate from noisy digital supplies without an additional linear regulator. Comprehensive click-and-pop circuitry suppresses audible clicks and pops on startup and shutdown. The MAX9724A/MAX9724B operate from a single 2.7V to 5.5V supply, consume only 3.5mA of supply current, feature short-circuit and thermal-overload protection, and are specified over the extended -40°C to +85°C temperature range. The devices are available in tiny 12-bump UCSP™ (1.5mm x 2mm) and 12-pin thin QFN (3mm x 3mm x 0.8mm) packages.

Key Features		Applications/Uses
Improved RF Noise Rejection (Up to 67dB Over Typical Amplifiers) No Bulky DC-Blocking Capacitors Required Low-Power Shutdown Mode, < 0.1µA Adjustable Gain (MAX9724A) or Fixed -1.5V/V Gain (MAX9724B) Low 0.02% THD+N High PSRR (80dB at 1kHz) Eliminates LDO Integrated Click-and-Pop Suppression 2.7V to 5.5V Single-Supply Operation Low Quiescent Current (3.5mA) Available in Space-Saving Packages: 12-Bump UCSP (1.5mm x 2mm) 12-Pin Thin QFN (3mm x 3mm x 0.8mm)		Cellular Phones DVD Players Handheld Gaming Consoles MP3 Players Notebook PCs PDAs Smartphones

†U.S. Patent# 7,061,327

Diagram

Functional Diagram

Application Notes

Application Note 3880: Minimizing RF Susceptibility in Cell-Phone Headphone Amplifiers - MAX9724

Evaluation Kits

MAX9724AEVKIT

Design Guides

Amplifiers and Sensors (PDF) Audio (PDF)

Reliability Reports

Reliability Report: MAX9724B.pdf MAX9724.pdf Show FIT data for: MAX9724 Request Reliability Report for: MAX9724A

Software/Models

none

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: 1-10 of 10
MAX9724A	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9724AETC+			TQFN;12 pin;10 mm² Outline Drawing: 21-0136 (PDF) Land Pattern: 90-0017 (PDF) Use pkgcode/variation: T1233+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9724AETC+T			TQFN;12 pin;10 mm² Outline Drawing: 21-0136 (PDF) Land Pattern: 90-0017 (PDF) Use pkgcode/variation: T1233+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9724AEBC+G45			UCSP;12 pin;3 mm² Outline Drawing: 21-0104 (PDF) Land Pattern: Not Available Use pkgcode/variation: B12+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9724AEBC+TG45			UCSP;12 pin;3 mm² Outline Drawing: 21-0104 (PDF) Land Pattern: Not Available Use pkgcode/variation: B12+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9724AEBC+			UCSP;12 pin;3 mm² Outline Drawing: 21-0104 (PDF) Land Pattern: Not Available Use pkgcode/variation: B12+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9724B	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9724BETC+T			TQFN;12 pin;10 mm² Outline Drawing: 21-0136 (PDF) Land Pattern: 90-0017 (PDF) Use pkgcode/variation: T1233+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9724BETC+			TQFN;12 pin;10 mm² Outline Drawing: 21-0136 (PDF) Land Pattern: 90-0017 (PDF) Use pkgcode/variation: T1233+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9724BEBC+G45			UCSP;12 pin;3 mm² Outline Drawing: 21-0104 (PDF) Land Pattern: Not Available Use pkgcode/variation: B12+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9724BEBC+			UCSP;12 pin;3 mm² Outline Drawing: 21-0104 (PDF) Land Pattern: Not Available Use pkgcode/variation: B12+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9724BEBC+TG45			UCSP;12 pin;3 mm² Outline Drawing: 21-0104 (PDF) Land Pattern: Not Available Use pkgcode/variation: B12+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Topmark Coding: MAX9724 New Product Press Release 2005-10-28

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