Datasheet > MAX9728

MAX9728

更新时间： 2024-11-04 02:48:59

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
19页	309K
描述
60mW, DirectDrive, Stereo Headphone Amplifiers with Shutdown

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MAX9728 数据手册

19-3963; Rev 1; 7/09

60mW, DirectDrive, Stereo

Headphone Amplifiers with Shutdown

/MAX9728B

General Description

Features

♦ No Bulky DC-Blocking Capacitors Required

The MAX9728A/MAX9728B stereo headphone ampli-

fiers are designed for display and notebook applica-

tions or portable equipment where board space is at a

premium. These devices use a unique 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 MAX9728A offers an externally

adjustable gain, while the MAX9728B has an internally

preset gain of -1.5V/V. The MAX9728A/MAX9728B

deliver up to 60mW per channel into a 32Ω load and

have low 0.02% THD+N. An 80dB at 1kHz power-sup-

ply rejection ratio (PSRR) allows these devices to oper-

ate from noisy digital supplies without an additional

linear regulator. Comprehensive click-and-pop circuitry

suppresses audible clicks and pops on startup and

shutdown.

♦ Low-Power Shutdown Mode, < 0.1µA

♦ Adjustable Gain (MAX9728A) or Fixed -1.5V/V

Gain (MAX9728B)

♦ Low 0.02% THD+N

♦ High PSRR (80dB at 1kHz) Eliminates LDO

♦ Integrated Click-and-Pop Suppression

♦ 4.5V to 5.5V Single-Supply Operation

♦ Low Quiescent Current (3.5mA)

♦ Available in Space-Saving Packages

12-Pin Thin QFN (3mm x 3mm x 0.8mm)

14-Pin TSSOP (5mm x 4.4mm x 1.1mm)

The MAX9728A/MAX9728B operate from a single 4.5V

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-

pin Thin QFN (3mm x 3mm x 0.8mm) and 14-pin

TSSOP packages (5mm x 4.4mm x 1.1mm).

Ordering Information

PART

GAIN (V/V) PIN-PACKAGE TOP MARK

MAX9728AETC+

MAX9728AEUD+

MAX9728BETC+

MAX9728BEUD+

Adj.

-1.5

12 TQFN-EP*

14 TSSOP

ABC

—

12 TQFN-EP*

14 TSSOP

ABD

—

Applications

CRT TVs

Note: All devices specified over the -40°C to +85°C operating

Notebook PCs

DVD Players

range.

+Denotes lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

Multimedia Monitors

LCD/PDP Displays

DirectDrive is a registered trademark of Maxim Integrated

Product, Inc.

Pin Configurations appear at end of data sheet.

Block Diagrams

MAX9728B

MAX9728A

DirectDrive OUTPUTS

ELIMINATE DC-BLOCKING

CAPACITORS

DirectDrive OUTPUTS

ELIMINATE DC-BLOCKING

LEFT

AUDIO

INPUT

LEFT

AUDIO

CAPACITORS

INPUT

SHDN

RIGHT

AUDIO

INPUT

FIXED GAIN ELIMINATES

AUDIO

EXTERNAL RESISTOR

INPUT

NETWORK

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...19

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与MAX9728相关器件

型号	品牌	获取价格	描述	数据表
MAX9728A	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifiers with Shutdown
MAX9728AETC	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifiers with Shutdown
MAX9728AETC+	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifiers with Shutdown
MAX9728AETC-T	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifiers with Shutdown
MAX9728AEUD	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifiers with Shutdown
MAX9728AEUD+	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifiers with Shutdown
MAX9728AEUD+T	MAXIM	获取价格	Audio Amplifier, 0.063W, 2 Channel(s), 1 Func, BICMOS, PDSO14, 5 X 4.40 MM, 1.10 MM HEIGHT
MAX9728B	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifiers with Shutdown
MAX9728BETC	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifiers with Shutdown
MAX9728BETC+	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifiers with Shutdown

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