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SSM2301CPZ-REEL7 数据表(PDF) 1 Page - Analog Devices |
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SSM2301CPZ-REEL7 数据表(HTML) 1 Page - Analog Devices |
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1 / 16 page  Filterless High Efficiency Mono 1.4 W Class-D Audio Amplifier SSM2301 Rev. A 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 ©2007 Analog Devices, Inc. All rights reserved. FEATURES Filterless Class-D amplifier with Σ-Δ modulation No sync necessary when using multiple Class-D amplifiers from Analog Devices, Inc. 1.4 W into 8 Ω at 5.0 V supply with less than 1% THD + N 85% efficiency at 5.0 V, 1.4 W into 8 Ω speaker Greater than 98 dB SNR (signal-to-noise ratio) Single-supply operation from 2.5 V to 5.0 V 20 nA ultralow shutdown current Short-circuit and thermal protection Available in 8-lead, 3 mm × 3 mm LFCSP and MSOP packages Pop-and-click suppression Built-in resistors reduce board component count Fixed and user-adjustable gain configurations APPLICATIONS Mobile phones MP3 players Portable gaming Portable electronics Educational toys GENERAL DESCRIPTION The SSM2301 is a fully integrated, high efficiency, Class-D audio amplifier 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 continuous output power with less than 1% THD + N driving an 8 Ω load from a 5.0 V supply. The SSM2301 features a high efficiency, low noise modulation scheme that does not require external LC output filters. The modu- lation provides high efficiency even at low output power. The SSM2301 operates with 85% efficiency at 1.4 W into 8 Ω from a 5.0 V supply and has a signal-to-noise ratio (SNR) that is greater than 98 dB. Spread-spectrum modulation is used to provide lower EMI-radiated emissions compared with other Class-D architectures. The SSM2301 has a micropower shutdown mode with a maximum shutdown current of 30 nA. Shutdown is enabled by applying a logic low to the SD pin. The device also includes pop-and-click suppression circuitry. This minimizes voltage glitches at the output during turn-on and turn-off, thus reducing audible noise on activation and deactivation. The fully differential input of the SSM2301 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 SSM2301 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. The gain can be set to 6 dB or 12 dB by utilizing the gain control select pin connected respectively to ground or to VDD. Gain can also be adjusted externally by inserting a resistor in series with each input pin. The SSM2301 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 both an 8-lead, 3 mm × 3 mm lead-frame chip scale package (LFCSP) and an 8-lead MSOP package. FUNCTIONAL BLOCK DIAGRAM SHUTDOWN GAIN CONTROL FET DRIVER MODULATOR 0.1µF VDD GND OSCILLATOR POP/CLICK SUPPRESSION OUT+ OUT– BIAS IN+ VBATT 2.5V TO 5.0V IN– GAIN 10µF 0.01µF1 NOTES 1 INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE VOLTAGE IS APPROXIMATELY VDD/2. 0.01µF1 SD AUDIO IN– AUDIO IN+ SSM2301 Figure 1. |
类似零件编号 - SSM2301CPZ-REEL7 |
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类似说明 - SSM2301CPZ-REEL7 |
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