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SSM2302CPZ-REEL7

更新时间： 2024-11-03 04:02:47
品牌 Logo 应用领域
亚德诺 - ADI 消费电路商用集成电路音频放大器视频放大器
页数 文件大小 规格书
20页 457K
描述
Filterless High Efficiency Class-D Stereo Audio Amplifier

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SSM2302CPZ-REEL7 数据手册

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Filterless High Efficiency  
Class-D Stereo Audio Amplifier  
SSM2302  
5.0 V supply and has a signal-to-noise ratio (SNR) that is better  
than 98 dB. PDM modulation is used to provide lower EMI-  
radiated emissions compared with other Class-D architectures.  
FEATURES  
Filterless Class-D amplifier with built-in output stage  
1.4 W into 8 Ω at 5.0 V supply with less than 1% THD  
85% efficiency at 5.0 V, 1.4 W into 8 Ω speaker  
Better than 98 dB SNR (signal-to-noise ratio)  
Single-supply operation from 2.5 V to 5.0 V  
20 nA ultralow shutdown current  
The SSM2302 has a micropower shutdown mode with a typical  
shutdown current of 20 nA. Shutdown is enabled by applying a  
logic low to the  
pin.  
SD  
Short-circuit and thermal protection  
Available in 16-lead, 3 mm × 3 mm LFCSP  
Pop-and-click suppression  
Built-in resistors reduce board component count  
Fixed and user-adjustable gain configurations  
The architecture of the device allows it to achieve a very low level  
of pop and click. This minimizes voltage glitches at the output  
during turn-on and turn-off, thus reducing audible noise on  
activation and deactivation.  
APPLICATIONS  
Mobile phones  
MP3 players  
Portable gaming  
Portable electronics  
Educational toys  
The fully differential input of the SSM2302 provides excellent  
rejection of common-mode noise on the input. Input coupling  
capacitors can be omitted if the dc input common-mode voltage  
is approximately VDD/2.  
The SSM2302 also has excellent rejection of power supply noise,  
including noise caused by GSM transmission bursts and RF  
rectification. PSRR is typically 63 dB at 217 Hz.  
GENERAL DESCRIPTION  
The SSM2302 is a fully integrated, high efficiency, Class-D stereo  
audio amplifier. It is designed to maximize performance for  
mobile phone applications. The application circuit requires a  
minimum of external components and operates from a single  
2.5 V to 5.0 V supply. It is capable of delivering 1.4 W of con-  
tinuous output power with less than 1% THD + N driving an  
8 Ω load from a 5.0 V supply.  
The gain can be set to 6 dB or 12 dB utilizing the gain control  
select pin connected respectively to ground or VDD. Gain can  
also be adjusted externally by using an external resistor.  
The SSM2302 is specified over the commercial temperature range  
(−40°C to +85°C). It has built-in thermal shutdown and output  
short-circuit protection. It is available in a 16-lead, 3 mm × 3 mm  
lead-frame chip scale package (LFCSP).  
The SSM2302 features a high efficiency, low noise modulation  
scheme. It operates with 85% efficiency at 1.4 W into 8 Ω from a  
FUNCTIONAL BLOCK DIAGRAM  
0.1µF  
10µF  
VBATT  
2.5V TO 5.0V  
VDD  
VDD  
SSM2302  
1
0.01µF  
INR+  
OUTR+  
RIGHT IN+  
GAIN  
CONTROL  
FET  
DRIVER  
MODULATOR  
INR–  
OUTR–  
RIGHT IN–  
1
0.01µF  
SD  
SHUTDOWN  
GAIN  
GAIN  
INTERNAL  
OSCILLATOR  
BIAS  
1
1
0.01µF  
0.01µF  
INL+  
INL–  
OUTL+  
OUTL–  
LEFT IN+  
LEFT IN–  
GAIN  
CONTROL  
FET  
MODULATOR  
GND  
DRIVER  
GND  
1
INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE  
VOLTAGE IS APPROXIMATELY V /2.  
DD  
Figure 1.  
Rev. 0  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2006 Analog Devices, Inc. All rights reserved.  
 
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SSM2302CPZ-REEL7 替代型号

型号 品牌 替代类型 描述 数据表
SSM2302CPZ-R2 ADI

完全替代

 Filterless High Efficiency Class-D Stereo Audio Amplifier
SSM2306CPZ-REEL7 ADI

类似代替

 2 W, Filterless, Class-D Stereo Audio Amplifier

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