MAX9789A

更新时间： 2024-11-25 04:41:31

品牌	Logo	应用领域
美信 - MAXIM		放大器
页数	文件大小	规格书
26页	1028K
描述
Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers

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MAX9789A 数据手册

19-0606; Rev 0; 9/06

Windows Vista-Compliant, Stereo Class AB Speaker

Amplifiers and DirectDrive Headphone Amplifiers

8/MX790A

General Description

Features

The MAX9789A/MAX9790A combine a stereo, 2W Class

AB speaker power amplifier with a stereo 100mW

DirectDrive™ headphone amplifier in a single device.

The MAX9789A/MAX9790A are designed for use with the

Microsoft Windows Vista™ operating system and are fully

compliant with Microsoft’s Windows Vista specifications.

o Microsoft Windows Vista Compliant

o Class AB 2W Stereo BTL Speaker Amplifier

o 100mW DirectDrive Headphone Amplifier

Eliminates Costly, Bulky DC-Blocking Capacitors

o Excellent RF Immunity

†

The headphone amplifier features Maxim’s patented

o Integrated 120mA LDO (MAX9789A)

o High +90dB PSRR, Low 0.002% THD+N

o Low-Power Shutdown Mode

o Click-and-Pop Suppression

o Short-Circuit and Thermal-Overload Protection

DirectDrive architecture that produces a ground-refer-

enced output from a single supply to eliminate the need

for large DC-blocking capacitors, as well as save cost,

board space, and component height. A high +90dB

PSRR and low 0.002% THD+N ensures clean, low-distor-

tion amplification of the audio signal.

8kV ESD-Protected Headphone Driver Outputs

Separate speaker and headphone amplifier control

inputs provide independent shutdown of the speaker

and headphone amplifiers, allowing speaker and head-

phone amplifiers to be active simultaneously, if

required. The industry-leading click-and-pop suppres-

sion circuitry reduces audible transients during startup

and shutdown cycles.

o Available in 32-Pin Thin QFN (5mm x 5mm x

0.8mm) Package

Ordering Information

INTERNAL

LDO

PKG

CODE

PART

PIN-PACKAGE

MAX9789AETJ+

MAX9790AETJ+

32 Thin QFN-EP*

Yes

T3255N-1

The MAX9789A features an internal LDO that can be

used as a clean power supply for a CODEC or other cir-

cuits. The LDO output voltage is set internally at 4.75V or

can be adjusted between 1.21V and 4.75V using a sim-

ple resistive divider. The LDO is protected against ther-

mal overloads and short circuits while providing 120mA

of continuous output current and can be enabled inde-

pendently of the audio amplifiers.

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

temperature range.

+Denotes lead-free package.

*EP = Exposed paddle.

Simplified Block Diagrams

By disabling the speaker and headphone amplifiers, and

the LDO (for MAX9789A), the MAX9789A/MAX9790A

enter low-power shutdown mode and draw only 0.3µA.

SPEAKER SUPPLY HEADPHONE SUPPLY

4.5V TO 5.5V

3.0V TO 5.5V

The MAX9789A/MAX9790A operate from a single 4.5V

to 5.5V supply and feature thermal-overload and out-

put short-circuit protection. Devices are specified over

the -40°C to +85°C extended temperature range.

SPKR_INR

MAX9789A

SPKR_INL

HP_INR

Applications

Notebook Computers

Tablet PCs

HP_INL

SPKR_EN

HP_EN

Portable Multimedia Players

MUTE

GAIN1

GAIN2

Pin Configurations appear at end of data sheet.

LDO

1.21V TO 4.75V

4.5V TO 5.5V

†

U.S. Patent # 7,061,327

Simplified Block Diagrams continued at end of data sheet.

Windows Vista is a trademark of Microsoft Corp.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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与MAX9789A相关器件

型号	品牌	获取价格	描述	数据表
MAX9789AETJ+	MAXIM	获取价格	Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Ampl
MAX9789AETJ+T	MAXIM	获取价格	Audio Amplifier, 2W, 2 Channel(s), 1 Func, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, ROHS COMPLIAN
MAX9789AEVKIT	MAXIM	获取价格	Integrated 120mA Low-Dropout Linear Regulator
MAX9789AEVKIT+	MAXIM	获取价格	Integrated 120mA Low-Dropout Linear Regulator
MAX9789BETJ+	MAXIM	获取价格	Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Ampl
MAX9789BETJ+T	MAXIM	获取价格	Audio Amplifier
MAX9789CETJ+	MAXIM	获取价格	Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Ampl
MAX978EEE	MAXIM	获取价格	Single/Dual/Quad, SOT23, Single-Supply, High-Speed, Low-Power Comparators
MAX978EEE+	MAXIM	获取价格	Comparator, 4 Func, 3000uV Offset-Max, 28ns Response Time, CMOS, PDSO16, QSOP-16
MAX978EEE+T	MAXIM	获取价格	Comparator, 4 Func, 3000uV Offset-Max, 28ns Response Time, CMOS, PDSO16, QSOP-16

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