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MAX9775_V01 PDF预览

MAX9775_V01

更新时间: 2024-11-07 02:51:03
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
38页 658K
描述
2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier

MAX9775_V01 数据手册

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19-0746; Rev 4; 8/08  
2 x 1.5W, Stereo Class D Audio Subsystem  
with DirectDrive Headphone Amplifier  
5/MAX976  
General Description  
Features  
Unique Spread-Spectrum Modulation and Active  
The MAX9775/MAX9776 combine a high-efficiency  
Class D, stereo/mono audio power amplifier with a  
mono DirectDrive® receiver amplifier and a stereo  
DirectDrive headphone amplifier.  
Emissions Limiting Significantly Reduces EMI  
3D Stereo Enhancement (MAX9775 Only)  
Up to 3 Stereo Inputs  
Maxim’s 3rd-generation, ultra-low-EMI, Class D audio  
power amplifiers provide Class AB performance with  
Class D efficiency. The MAX9775/MAX9776 deliver  
1.5W per channel into a 4Ω load from a 5V supply and  
offer efficiencies up to 79%. Active emissions limiting  
circuitry and spread-spectrum modulation greatly  
reduce EMI, eliminating the need for output filtering  
found in traditional Class D devices.  
1.5W Stereo Speaker Output (4Ω, V  
= 5V)  
DD  
50mW Mono Receiver/Stereo Headphone Outputs  
(32Ω, V = 3.3V)  
DD  
High PSRR (68dB at 217Hz)  
79% Efficiency (V  
= 3.3V, R = 8Ω, P  
=
DD  
L
OUT  
470mW)  
I2C Control—Input Configuration, Volume Control,  
Output Mode  
The MAX9775/MAX9776 utilize a fully differential archi-  
tecture, a full-bridged output, and comprehensive click-  
and-pop suppression. A 3D stereo enhancement  
function allows the MAX9775 to widen the stereo sound  
field immersing the listener in a cleaner, richer sound  
experience than typically found in portable applications.  
The devices utilize a flexible, user-defined mixer archi-  
tecture that includes an input mixer, volume control, and  
output mixer. All control is done through I2C.  
Click-and-Pop Suppression  
Low Total Harmonic Distortion (0.03% at 1kHz)  
Current-Limit and Thermal Protection  
Available in Space-Saving, 36-Bump WLP (3mm x  
3mm) and 32-Pin TQFN (5mm x 5mm) Packages  
Ordering Information  
CLASS D  
AMPLIFIER  
PART  
PIN-PACKAGE  
The mono receiver amplifier and stereo headphone  
amplifier use Maxim’s DirectDrive architecture that pro-  
duces a ground-referenced output from a single supply,  
eliminating the need for large DC-blocking capacitors,  
saving cost, space, and component height.  
MAX9775EBX+T  
MAX9776ETJ+  
MAX9776EBX+T  
36 WLP*  
Stereo  
Mono  
Mono  
32 TQFN-EP**  
36 WLP*  
The MAX9775 is available in a 36-bump WLP (3mm x  
3mm) package. The MAX9776 is available in a 32-pin  
TQFN (5mm x 5mm) or a 36-bump WLP (3mm x 3mm)  
package. Both devices are specified over the extended  
-40°C to +85°C temperature range.  
Applications  
Cell Phones  
Note: All devices are specified over the -40°C to +85°C oper-  
ating temperature range.  
+Denotes a lead-free/RoHS-compliant package.  
*Four center bumps depopulated.  
**EP = Exposed pad.  
Pin Configurations appear at end of data sheet.  
DirectDrive is a registered trademark of Maxim Integrated  
Products, Inc.  
Portable Multimedia Players  
Handheld Gaming Consoles  
Simplified Block Diagrams  
SINGLE SUPPLY 2.7V TO 5.5V  
SINGLE SUPPLY 2.7V TO 5.5V  
3D  
SOUND  
CONTROL  
GAIN  
CONTROL  
GAIN  
CONTROL  
MIXER/  
MUX  
MIXER/  
MUX  
2
2
I C  
I C  
INTERFACE  
INTERFACE  
MAX9775  
MAX9776  
________________________________________________________________ Maxim Integrated Products  
1
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.  

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