MAX9877

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
30页	499K
描述
Low RF Susceptibility, Mono Audio Subsystem with DirectDrive Headphone Amplifier

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MAX9877 数据手册

19-4076; Rev 0; 7/08

Low RF Susceptibility, Mono Audio

Subsystem with DirectDrive Headphone Amplifier

MAX987

General Description

Features

♦ Low Emissions, Filterless Class D Amplifier

The MAX9877 combines a high-efficiency Class D

audio power amplifier with a stereo Class AB capacitor-

less DirectDrive^®headphone amplifier. Maxim’s 3rd

generation, filterless Class D amplifier with active emis-

sions limiting technology provides Class AB perfor-

mance with Class D efficiency.

Achieves Better than 10dB Margin Under EN55022

Class B Limits

♦ Low RF Susceptibility Design Rejects TDMA

Noise from GSM Radios

♦ Input Mixer with User-Defined Input Mode

♦ 725mW Speaker Output (R

= 8Ω, PV

= 3.7V)

SPK

The MAX9877 delivers up to 725mW from a 3.7V supply

into an 8Ω load with 87% efficiency to extend battery life.

The filterless modulation scheme combined with active

emissions limiting circuitry and spread-spectrum modu-

lation greatly reduces EMI while eliminating the need for

output filtering used in traditional Class D devices.

♦ 53mW Headphone Output (R = 16Ω, V

♦ Low 0.05% THD+N at 1kHz (Class D Power

Amplifier)

♦ Low 0.016% THD+N at 1kHz (Headphone

Amplifier)

♦ 87% Efficiency (R

= 8Ω, P

= 750mW)

SPK

OUT

The stereo Class AB headphone amplifier in the

MAX9877 uses Maxim’s patented DirectDrive architec-

ture, that produces a ground-referenced output from a

single supply, eliminating the need for large DC-blocking

capacitors, saving cost, space, and component height.

♦ 1.6Ω Analog Switch for Speaker Amplifier Bypass

♦ High Speaker Amplifier PSRR (72dB at 217Hz)

♦ High Headphone Amplifier PSRR (84dB at 217Hz)

♦ I²C Control

♦ Hardware and Software Shutdown Mode

♦ Click-and-Pop Suppression

♦ Current-Limit and Thermal Protection

♦ Available in a Space-Saving, 2.5mm x 2.0mm WLP

Package

The device utilizes a user-defined input architecture,

three preamplifier gain settings, an input mixer, volume

control, comprehensive click-and-pop suppression, and

I²C control. A bypass mode feature disables the integrat-

ed Class D amplifier and utilizes an internal DPST switch

to allow an external amplifier to drive the speaker that is

connected at the outputs of the MAX9877.

Ordering Information

The MAX9877 is available in a thermally efficient,

space-saving 20-bump WLP package.

PART

TEMP RANGE

PIN-PACKAGE

MAX9877EWP+TG45 -40°C to +85°C

20 WLP (5x4)

Applications

+Denotes a lead-free package.

T = Tape and reel.

Cell Phones

G45 indicates protective die coating.

Portable Multimedia Players

Simplified Block Diagram

Pin Configuration

SINGLE SUPPLY

2.7V TO 5.25V

TOP VIEW

(BUMP SIDE DOWN)

VOLUME

PREAMPLIFIER

CONTROL

HPR

HPL

C1N

C1P

SDA

SCL

MIXER/MUX

BIAS

RXIN+

OUT+

VOLUME

CONTROL

I C

INTERFACE

INB2

INA2

INB1

INA1

PGND

RXIN-

BYPASS

GND

OUT-

MAX9877

WLP

________________________________________________________________ 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...30

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与MAX9877相关器件

型号	品牌	获取价格	描述	数据表
MAX9877AERP	MAXIM	获取价格	Low RF Susceptibility, Mono Audio Subsystem with DirectDrive Headphone Amplifier
MAX9877AERP+	MAXIM	获取价格	Volume Control Circuit,
MAX9877AERP+T	MAXIM	获取价格	Low RF Susceptibility, Mono Audio Subsystem with DirectDrive Headphone Amplifier
MAX9877EWP+TG45	MAXIM	获取价格	Low RF Susceptibility, Mono Audio Subsystem with DirectDrive Headphone Amplifier
MAX9879	MAXIM	获取价格	Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9879_V01	MAXIM	获取价格	Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9879ERV+	MAXIM	获取价格	Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier
MAX9879ERV+T	MAXIM	获取价格	Volume Control Circuit,
MAX987ESA	MAXIM	获取价格	High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators
MAX987ESA-T	MAXIM	获取价格	Comparator, 1 Func, 7000uV Offset-Max, 210ns Response Time, BIPolar, PDSO8, 0.150 INCH, SO

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