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MAX9850

更新时间： 2024-11-19 15:19:43
品牌 Logo 应用领域
亚德诺 - ADI 放大器
页数 文件大小 规格书
36页 3645K
描述
立体声音频DAC，带有DirectDrive?耳机放大器

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中文翻译

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MAX9850 数据手册

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EVALUATION KIT AVAILABLE  
Click here for production status of specific part numbers.  
MAX9850  
Stereo Audio DAC with DirectDrive  
Headphone Amplifier  
General Description  
Features  
● 1.8V to 3.6V Single-Supply Operation  
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.  
● 30mW Stereo Headphone Output Power with  
1.8V Supply  
● DirectDrive Outputs Eliminate DC-Blocking  
Capacitors  
The MAX9850 uses Maxim’s 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 feature saves board space,  
provides higher click/pop suppression, 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 conventional, grounded chassis  
design.  
● 91dB PSRR at 1kHz  
● Any Master Clock Up to 40MHz  
2
● Flexible I S-Compatible Digital Audio Interface  
2
● I C Headphone Volume and Mute Control  
● Stereo Line Inputs and Outputs  
● Clickless/Popless Operation  
2
● 2-Wire (I C)-Compatible Control Interface  
● Available in 28-Pin Thin QFN Package  
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.  
Ordering Information  
PIN-  
PACKAGE  
PKG  
CODE  
PART  
TEMP RANGE  
MAX9850ETI+ -40°C to +85°C 28 TQFN-EP** T2855+  
**EP = Exposed pad.  
+Denotes lead-free package.  
The audio DAC receives input data over a flexible  
3-wire interface that supports left-justified, right-  
justified audio data, or I S-compatible audio data. Stereo  
Pin Configuration appears at end of data sheet.  
2
audio line inputs are provided to either mix analog audio  
with the digital input stream, or to drive the headphone  
outputs directly. Mode settings, headphone amplifier  
volume controls, and shutdown for both the headphone  
and line outputs are programmed through a 2-wire,  
Block Diagram  
MCLK  
1.8V TO 3.6V  
INR  
2
I C-compatible interface.  
DIGITAL  
PLL  
OUTR  
HPR  
LINE  
OUT  
MAX9850  
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).  
DAC  
SDIN  
BCLK  
LRCLK  
DIGITAL  
AUDIO  
HPL  
Applications  
DAC  
●ꢀ MP3/Portable Multimedia Players  
●ꢀ Cell Phones/Smart Phones  
●ꢀ Portable DVD Players  
SDA  
SCL  
ADD  
GPIO  
OUTL  
LINE  
OUT  
2
I C  
INL  
19-3454; Rev 4; 8/19  
1234567...36

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