參數(shù)資料
型號(hào)： CMOD232+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 1/36頁(yè)
文件大小： 0K
描述： EVAL SYSTEM FOR MAX9850
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
系列： *
General Description
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.
The MAX9850 uses Maxim’s DirectDrive headphone
technology that produces a ground-biased analog
audio output from a single supply, which allows for dri-
ving the headphones directly from the amplifier outputs
without large DC-blocking capacitors. This feature
saves board space, provides higher click/pop suppres-
sion, 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 conven-
tional, grounded chassis design.
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.
The audio DAC receives input data over a flexible
3-wire interface that supports left-justified, right-justified
audio data, or I2S-compatible audio data. Stereo audio
line inputs are provided to either mix analog audio with
the digital input stream, or to drive the headphone out-
puts directly. Mode settings, headphone amplifier vol-
ume controls, and shutdown for both the headphone
and line outputs are programmed through a 2-wire,
I2C-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).
Applications
MP3/Portable Multimedia Players
Cell Phones/Smart Phones
Portable DVD Players
Features
1.8V to 3.6V Single-Supply Operation
30mW Stereo Headphone Output Power with
1.8V Supply
DirectDrive Outputs Eliminate DC-Blocking
Capacitors
91dB PSRR at 1kHz
Any Master Clock Up to 40MHz
Flexible I2S-Compatible Digital Audio Interface
I2C Headphone Volume and Mute Control
Stereo Line Inputs and Outputs
Clickless/Popless Operation
2-Wire (I2C)-Compatible Control Interface
Available in 28-Pin Thin QFN Package
MAX9850
Stereo Audio DAC with DirectDrive
Headphone Amplifier
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-3454; Rev 3; 4/06
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.
EVALUATION
KIT
AVAILABLE
PART
TEMP RANGE
PIN-PACKAGE
PKG
CODE
MAX9850ETI+
-40°C to +85°C
28 TQFN-EP**
T2855-6
Pin Configuration appears at end of data sheet.
+
DAC
+
DAC
DIGITAL
AUDIO
DIGITAL
PLL
I2C
MAX9850
SDIN
BCLK
LRCLK
SDA
SCL
ADD
GPIO
LINE
OUT
LINE
OUT
OUTR
HPR
HPL
OUTL
INL
INR
1.8V TO 3.6V
MCLK
Block Diagram
**EP = Exposed pad.
+Denotes lead-free package.
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