Datasheet > MAX9724B

MAX9724B

更新时间： 2024-11-04 14:57:31

品牌	Logo	应用领域
亚德诺 - ADI		放大器
页数	文件大小	规格书
19页	346K
描述
60mW、DirectDrive、立体声耳机放大器，具有较低的RF干扰敏感度，带关断控制

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MAX9724B 数据手册

19-3597; Rev 6; 3/09

60mW, DirectDrive, Stereo Headphone Amplifier

with Low RF Susceptibility and Shutdown

/MAX9724B

General Description

Features

The MAX9724A/MAX9724B stereo headphone ampli-

fiers are designed for portable equipment where board

space is at a premium. These devices use a unique

DirectDrive^®architecture to produce a ground-refer-

enced output from a single supply, eliminating the need

for large DC-blocking capacitors, saving cost, board

space, and component height. The MAX9724 sup-

presses 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.

♦ 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)

Ordering Information

GAIN

(V/V)

PIN-

TOP

PART

PACKAGE

MARK

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.

MAX9724AEBC+TG45

MAX9724AETC+

Adj.

-1.5

12 UCSP

+ADH

+AAT

+ADI

12 TQFN-EP*

12 UCSP

MAX9724BEBC+TG45

MAX9724BETC+

12 TQFN-EP*

+AAU

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

range.

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

T = Tape and reel.

Applications

DVD Players

Smart Phones

PDAs

Cellular Phones

MP3 Players

Notebook PCs

*EP = Exposed paddle.

Pin Configurations appear at end of data sheet.

Handheld Gaming Consoles

DirectDrive is a registered trademark of Maxim Integrated

UCSP is a trademark of Maxim Integrated Products, Inc.

Products, Inc.

Block Diagrams

MAX9724B

MAX9724A

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MAX9724B相关器件

型号	品牌	获取价格	描述	数据表
MAX9724BEBC+G45	MAXIM	获取价格	Audio Amplifier, 0.045W, 2 Channel(s), 1 Func, BICMOS, PBGA12, UCSP-12
MAX9724BEBC+T	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifier with Low RF Susceptibility and Shutdown
MAX9724BEBC+TG45	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifier with Low RF Susceptibility and Shutdown
MAX9724BETC+	MAXIM	获取价格	60mW, DirectDrive, Stereo Headphone Amplifier with Low RF Susceptibility and Shutdown
MAX9724BETC+T	MAXIM	获取价格	暂无描述
MAX9724BEUD+	MAXIM	获取价格	Audio Amplifier, 0.06W, 2 Channel(s), 1 Func, BICMOS, PDSO14, 5 X 4.40 MM, 1.10 MM HEIGHT,
MAX9724BEUD+	ROCHESTER	获取价格	0.06W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14, 5 X 4.40 MM, 1.10 MM HEIGHT, LEAD FREE, MO-153A
MAX9724BEUD+T	MAXIM	获取价格	Audio Amplifier, 0.06W, 2 Channel(s), 1 Func, BICMOS, PDSO14, 5 X 4.40 MM, 1.10 MM HEIGHT,
MAX9724C	MAXIM	获取价格	Low RF Susceptibility DirectDrive Stereo Headphone Amplifier with 1.8V Compatible Shutdown
MAX9724C	ADI	获取价格	具有低RF干扰敏感度的DirectDrive立体声耳机放大器，提供1.8V兼容关断控制

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