MAX9850

更新时间： 2024-11-17 22:55:07

品牌	Logo	应用领域
美信 - MAXIM		放大器
页数	文件大小	规格书
36页	952K
描述
Stereo Audio DAC with DirectDrive Headphone Amplifier

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MAX9850 数据手册

19-3454; Rev 0; 11/04

Stereo Audio DAC with DirectDrive

Headphone Amplifier

General Description

Features

The MAX9850 is a low-power, high-performance stereo

audio DAC with an integrated DirectDrive™ headphone

amplifier. The MAX9850 is designed to meet the board

space and performance requirements of portable devices

such as cell phones and MP3 and portable DVD players.

♦ 1.8V to 3.6V Single-Supply Operation

♦ 30mW Stereo Headphone Output Power with

1.8V Supply

♦ DirectDrive Outputs Eliminate DC-Blocking

The MAX9850 uses Maxim’s patented DirectDrive

headphone technology that produces a ground-biased

analog audio output from a single supply, which allows

for driving the headphones directly from the amplifier

outputs without large DC-blocking capacitors. This fea-

ture saves board space, provides higher click/pop sup-

pression, and improves low-frequency (bass) response.

The architecture does not require the headphone jack

to be biased to a DC voltage and thus allows for a con-

ventional, grounded chassis design.

Capacitors

♦ 91dB PSRR at 1kHz

♦ Any Master Clock Up to 40MHz

♦ Flexible I S-Compatible Digital Audio Interface

♦ I C Headphone Volume and Mute Control

♦ Stereo Line Inputs and Outputs

♦ Clickless/Popless Operation

The MAX9850’s flexible clocking circuitry utilizes any

available system clock up to 40MHz, eliminating the

need for an external PLL and multiple crystal oscillators.

The DAC supports a wide range of sample rates from

8kHz to 48kHz in both master and slave modes, making

the MAX9850 the easiest to use and most versatile audio

DAC available. It can also be operated like traditional

synchronous DACs, at any integer-oversampling ratio.

♦ 2-Wire (I C)-Compatible Control Interface

♦ Available in 28-Pin Thin QFN Package

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX9850ETI

-40°C to +85°C

28 Thin QFN-EP*

The audio DAC receives input data over a flexible

3-wire interface that supports up to 32 bits of left-justi-

*EP = Exposed Paddle. Package code T2855-6 (see Package

Information section).

fied, right-justified, or I S-compatible audio data. Stereo

audio line inputs are provided to either mix analog

audio with the digital input stream, or to drive the head-

phone outputs directly. Mode settings, headphone

amplifier volume controls, and shutdown for both the

headphone and line outputs are programmed through a

Pin Configuration appears at end of data sheet.

Block Diagram

2-wire, I C-compatible interface.

The MAX9850 is fully specified over the -40°C to +85°C

extended temperature range and is available in a low-

profile, 28-pin thin QFN package (5mm x 5mm x 0.8mm).

MCLK

1.8V TO 3.6V

INR

DIGITAL

PLL

OUTR

HPR

LINE

OUT

Applications

MP3/Portable Multimedia Players

Cell Phones/Smart Phones

MAX9850

DAC

SDIN

BCLK

LRCLK

DIGITAL

AUDIO

HPL

Portable DVD Players

DAC

SDA

SCL

ADD

GPIO

OUTL

LINE

OUT

I C

Purchase of I C components from Maxim Integrated Products,

Inc. or one of its sublicensed Associated Companies, conveys

INL

a license under the Philips I C Patent Rights to use these com-

ponents in an I C system, provided that the system conforms to

the I C Standard Specification as defined by Philips.

________________________________________________________________ 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MAX9850相关器件

型号	品牌	获取价格	描述	数据表
MAX9850_V01	MAXIM	获取价格	Stereo Audio DAC with DirectDrive Headphone Amplifier
MAX98500	MAXIM	获取价格	升压型2.2W D类扬声器放大器
MAX98500EVKIT	MAXIM	获取价格	MAX98500 Evaluation Kit
MAX98500EVKIT+	MAXIM	获取价格	MAX98500 Evaluation Kit
MAX98500EWE+	MAXIM	获取价格	Boosted 2.2W Class D Amplifier with Automatic Level Control
MAX98500EWE+T	MAXIM	获取价格	暂无描述
MAX98502	MAXIM	获取价格	Boosted 2.2W Class D Amplifier with Automatic Level Control
MAX98502	ADI	获取价格	内置boost转换器的2.2W D类放大器，带有自动电平控制
MAX98502EWE+T	MAXIM	获取价格	Audio Amplifier,
MAX9850ETI	MAXIM	获取价格	Stereo Audio DAC with DirectDrive Headphone Amplifier

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