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MAX9700

更新时间: 2024-11-08 14:58:07
品牌 Logo 应用领域
亚德诺 - ADI 放大器音频放大器
页数 文件大小 规格书
17页 2036K
描述
1.2W、低EMI、无需滤波、D类音频放大器

MAX9700 数据手册

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Click here for production status of specific part numbers.  
MAX9700  
1.2W, Low-EMI, Filterless,  
Class D Audio Amplifier  
General Description  
Features  
Filterless Amplifier Passes FCC Radiated  
The MAX9700 mono class D audio power amplifier  
provides class AB amplifier performance with class D  
efficiency, conserving board space and extending battery  
life. Using a class D architecture, the MAX9700  
delivers 1.2W into an 8Ω load while offering efficiencies  
above 90%. A low-EMI modulation scheme renders the  
traditional class D output filter unnecessary.  
Emissions Standards with 100mm of Cable  
Unique Spread-Spectrum Mode Offers 5dB  
Emissions Improvement Over Conventional Methods  
Optional External SYNC Input  
Simple Master-Slave Setup for Stereo Operation  
94% Efficiency  
The MAX9700 offers two modulation schemes: a fixed-  
frequency (FFM) mode, and a spread-spectrum (SSM)  
mode that reduces EMI-radiated emissions due to the  
modulation frequency. Furthermore, the MAX9700 oscillator  
can be synchronized to an external clock through the  
SYNC input, allowing the switching frequency to be user  
defined. The SYNC input also allows multiple MAX9700s  
to be cascaded and frequency locked, minimizing  
interference due to clock intermodulation. The device  
utilizes a fully differential architecture, a full-bridged  
output, and comprehensive click-and-pop suppression.  
The gain of the MAX9700 is set internally (MAX9700A:  
6dB, MAX9700B: 12dB, MAX9700C: 15.6dB, MAX9700D:  
20dB), further reducing external component count.  
● 1.2W into 8Ω  
Low 0.01% THD+N  
High PSRR (72dB at 217Hz)  
Integrated Click-and-Pop Suppression  
Low Quiescent Current (4mA)  
● Low-Power Shutdown Mode (0.1μA)  
Short-Circuit and Thermal-Overload Protection  
Available in Thermally Efficient, Space-Saving  
Packages  
• 10-Pin TDFN (3mm x 3mm x 0.8mm)  
10-Pin μMAX  
• 12-Bump UCSP (1.5mm x 2mm x 0.6mm)  
Ordering Information  
The MAX9700 features high 72dB PSRR, a low 0.01%  
THD+N, and SNR in excess of 90dB. Short-circuit and  
thermal-overload protection prevent the device from  
damage during a fault condition. The MAX9700 is available  
PIN-  
PACKAGE  
TOP  
MARK  
PART  
TEMP RANGE  
MAX9700AETB+  
MAX9700AEUB+  
-40°C to +85°C 10 TDFN-EP* ACM  
-40°C to +85°C 10 µMAX  
®
in 10-pin TDFN (3mm x 3mm x 0.8mm), 10-pin μMAX ,  
MAX9700AEBC+T -40°C to +85°C 12 UCSP  
and 12-bump UCSP™ (1.5mm x 2mm x 0.6mm) packages.  
The MAX9700 is specified over the extended -40°C to  
+85°C temperature range.  
MAX9700BETB+  
MAX9700BEUB+  
-40°C to +85°C 10 TDFN-EP*  
-40°C to +85°C 10 µMAX  
ACI  
MAX9700BEBC+T -40°C to +85°C 12 UCSP  
Applications  
*EP = Exposed pad.  
Ordering Information continued and Selector Guide appears  
at end of data sheet.  
Cellular Phones  
PDAs  
MP3 Players  
Portable Audio  
Block Diagram  
Pin Configurations  
V
DD  
TOP VIEW  
V
1
2
3
4
5
10 PV  
DD  
DD  
IN+  
IN-  
9
8
7
6
OUT-  
DIFFERENTIAL  
AUDIO INPUT  
MODULATOR  
AND H-BRIDGE  
MAXꢀ700  
OUT+  
PGND  
SYNC  
GND  
SHDN  
SYNC  
INPUT  
OSCILLATOR  
MAXꢀ700  
TDFN/µMAX  
Pin Configurations continued at end of data sheet.  
UCSP is a trademark of Maxim Integrated Products, Inc.  
μMAX is a registered trademark of Maxim Integrated Products, Inc.  
19-3030; Rev 3; 3/18  

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