Datasheet > MAX9705AETB+

MAX9705AETB+

更新时间： 2023-06-15 00:00:00

品牌	Logo	应用领域
美信 - MAXIM		信息通信管理
页数	文件大小	规格书
18页	499K
描述
Audio Amplifier, 2.3W, 1 Channel(s), 1 Func, BICMOS, 3 X 3 MM, 0.80 MM HEIGHT, LEAD FREE, MO-229WEED-3, TDFN-10

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MAX9705AETB+ 数据手册

19-3405; Rev 3; 5/09

2.3W, Ultra-Low-EMI, Filterless,

Class D Audio Amplifier

MAX9705

General Description

Features

♦ Filterless Amplifier Passes FCC-Radiated

The MAX9705 3rd-generation, ultra-low EMI, mono, Class

D audio power amplifier provides Class AB performance

with Class D efficiency. The MAX9705 delivers 2.3W into

a 4Ω load and offers efficiencies above 85%. Active

emissions limiting (AEL) circuitry greatly reduces EMI by

actively controlling the output FET gate transitions under

all possible transient output-voltage conditions. AEL pre-

vents high-frequency emissions resulting from conven-

tional Class D free-wheeling behavior in the presence of

an inductive load. Zero dead time (ZDT) technology

maintains state-of-the-art efficiency and THD+N perfor-

mance by allowing the output FETs to switch simultane-

ously without cross-conduction. A spread-spectrum

modulation scheme eliminates the need for output filter-

ing found in traditional Class D devices. These design

concepts reduce an application’s component count and

extend battery life.

Emissions Standards with 24in of Cable

♦ Unique Spread-Spectrum Mode and Active

Emissions Limiting (AEL) Achieves Better than

20dB Margin Under FCC Limits

♦ Zero Dead Time (ZDT) H-Bridge Maintains State-

of-the-Art Efficiency and THD+N

♦ Simple Master-Slave Setup for Stereo Operation

♦ Up to 90% Efficiency

♦ 2.3W into 4Ω (1% THD+N)

♦ Low 0.02% THD+N (P

= 1W, V

= 5.0V)

OUT

♦ High PSRR (75dB at 217Hz)

♦ Integrated Click-and-Pop Suppression

♦ Low Quiescent Current (5.4mA)

♦ Low-Power Shutdown Mode (0.3µA)

♦ Short-Circuit and Thermal-Overload Protection

The MAX9705 offers two modulation schemes: a fixed-

frequency (FFM) mode and a spread-spectrum (SSM)

mode that further reduces EMI-radiated emissions due to

the modulation frequency. The MAX9705 oscillator can

be synchronized to an external clock through the SYNC

input, allowing the switching frequency to be externally

defined. The SYNC input also allows multiple MAX9705s

to be cascaded and frequency locked, minimizing inter-

ference due to clock intermodulation. The device utilizes

a fully differential architecture, a full-bridged output, and

comprehensive click-and-pop suppression. The gain of

the MAX9705 is set internally (MAX9705A: 6dB,

MAX9705B: 12dB, MAX9705C: 15.6dB, MAX9705D:

20dB), further reducing external component count.

♦ Available in Thermally Efficient, Space-Saving

Packages

10-Pin TDFN (3mm x 3mm x 0.8mm)

12-Bump UCSP (1.5mm x 2mm x 0.6mm)

♦ Pin-for-Pin Compatible with the MAX9700 and

MAX9712

Ordering Information

PIN-

TOP

PART

TEMP RANGE

PACKAGE

MARK

MAX9705AETB+T

MAX9705AEBC+T

MAX9705BETB+T

MAX9705BEBC+T

-40^oC to +85^oC 10 TDFN

-40^oC to +85^oC 12 UCSP

-40^oC to +85^oC 10 TDFN

-40^oC to +85^oC 12 UCSP

ACY

ACH

ACX

ACG

The MAX9705 is available in 10-pin TDFN (3mm x 3mm x

0.8mm), and 12-bump UCSP™ (1.5mm x 2mm x 0.6mm)

packages. The MAX9705 is specified over the extended

-40°C to +85°C temperature range.

Ordering Information continued at end of data sheet.

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

T = Tape and reel.

Applications

EMI Spectrum Diagram

Cellular Phones

PDAs

MP3 Players

Portable Audio

50.0

45.0

40.0

FCC EMI LIMIT

35.0

30.0

25.0

20.0

15.0

10.0

5.0

Selector Guide appears at end of data sheet.

MAXIM'S NEW ULTRA-LOW

OUTPUT SPECTRUM

30.0

60.0 80.0 100.0 120.0 140.0 160.0 180.0 200.0 220.0 240.0 260.0 280.0 300.0

FREQUENCY (MHz)

UCSP is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ 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...18

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与MAX9705AETB+相关器件

型号	品牌	获取价格	描述	数据表
MAX9705AETB+T	MAXIM	获取价格	2.3W, Ultra-Low-EMI, Filterless, Class D Audio Amplifier
MAX9705AEUB	MAXIM	获取价格	2.3W, Ultra-Low-EMI, Filterless, Class D Audio Amplifier
MAX9705AEUB+	MAXIM	获取价格	2.3W, Ultra-Low-EMI, Filterless, Class D Audio Amplifier
MAX9705AEUB+T	MAXIM	获取价格	Audio Amplifier, 1 Func, BICMOS, PDSO10
MAX9705BEBC+	MAXIM	获取价格	Audio Amplifier, 1.4W, 1 Channel(s), 1 Func, BICMOS, PBGA12, 1.50 X 2 MM, 0.60 MM HEIGHT,
MAX9705BEBC+	ROCHESTER	获取价格	1.4W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA12, 1.50 X 2 MM, 0.60 MM HEIGHT, LEAD FREE, UCSP-12
MAX9705BEBC+T	MAXIM	获取价格	2.3W, Ultra-Low-EMI, Filterless, Class D Audio Amplifier
MAX9705BETB+T	MAXIM	获取价格	2.3W, Ultra-Low-EMI, Filterless, Class D Audio Amplifier
MAX9705BEUB+	MAXIM	获取价格	2.3W, Ultra-Low-EMI, Filterless, Class D Audio Amplifier
MAX9705CEBC+	MAXIM	获取价格	Audio Amplifier, 1.4W, 1 Channel(s), 1 Func, BICMOS, PBGA12, 1.50 X 2 MM, 0.60 MM HEIGHT,

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