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SSM2211S-REEL 데이터시트(PDF) 1 Page - Analog Devices |
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SSM2211S-REEL 데이터시트(HTML) 1 Page - Analog Devices |
1 / 24 page Low Distortion, 1.5 W Audio Power Amplifier SSM2211 Rev. D Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. FEATURES 1.5 W output1 Differential (BTL2) output Single-supply operation: 2.7 V to 5.5 V Functions down to 1.75 V Wide bandwidth: 4 MHz Highly stable phase margin: >80 degrees Low distortion: 0.2% THD + N @ 1 W output Excellent power supply rejection APPLICATIONS Portable computers Personal wireless communicators Hands-free telephones Speaker phones Intercoms Musical toys and talking games FUNCTIONAL BLOCK DIAGRAM VOUTB IN– IN+ SHUTDOWN BYPASS VOUTA V– (GND) BIAS SSM2211 Figure 1. GENERAL DESCRIPTION The SSM22113 is a high performance audio amplifier that delivers 1 W rms of low distortion audio power into a bridge- connected 8 Ω speaker load (or 1.5 W rms into a 4 Ω load). It operates over a wide temperature range and is specified for single-supply voltages between 2.7 V and 5.5 V. When oper- ating from batteries, it continues to operate down to 1.75 V. This makes the SSM2211 the best choice for unregulated applications, such as toys and games. Featuring a 4 MHz bandwidth and distortion below 0.2% THD + N @ 1 W, superior performance is delivered at higher power or lower speaker load impedance than competitive units. The low differential dc output voltage results in negligible losses in the speaker winding and makes high value dc blocking capacitors unnecessary. Battery life is extended by using shutdown mode, which typically reduces quiescent current drain to 100 nA. The SSM2211 is designed to operate over the –40°C to +85°C temperature range. The SSM2211 is available in 8-lead SOIC (narrow body) and LFCSP (lead frame chip scale) surface- mount packages. The advanced mechanical packaging of the LFCSP models ensures lower chip temperature and enhanced performance relative to standard packaging options. Applications include personal portable computers, hands-free telephones and transceivers, talking toys, intercom systems, and other low voltage audio systems requiring 1 W output power. 1 At RL = 4 Ω, TA = 25°C, THD + N < 1%, VS = 5 V, 4-layer PCB. 2 Bridge-tied load. 3 Protected by U.S. Patent No. 5,519,576. |
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