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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LM48822TL датащи(PDF) 1 Page - National Semiconductor (TI) |
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LM48822TL датащи(HTML) 1 Page - National Semiconductor (TI) |
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1 / 22 page  July 10, 2008 LM48822 Ground-Referenced, Ultra High PSRR, Ultra Low Noise, 35mW/Channel Stereo Headphone Amplifier with Common Mode Sense, and I2C Volume Control General Description The LM48822 is a single supply, ground-referenced stereo headphone amplifier designed for portable devices, such as cell phones, where board space is at a premium. The LM48822 features National’s ground-referenced architecture, which eliminates the large DC blocking capacitor required by traditional headphone amplifiers, saving board space and minimizing system cost. The LM48822 features common-mode sensing that corrects for any differences between the amplifier ground and the po- tential at the headphone return terminal, minimizing noise created by any ground mismatches. The LM48822 delivers 35mW/channel into a 16 Ω load with <1% THD+N with a 3.6V supply. High power supply rejection ratio (PSRR), of 110dB at 217Hz, allows the device to operate in noisy environments without additional power supply condi- tioning. Flexible power supply requirements allow operation from 2.4V to 5.5V. The LM48822 has a differential inputs for improved noise rejection. High output impedance in Shut- down mode, combined with a charge pump-only mode allows the LM48822's outputs to be driven by an external source without degrading the source signal. Additionally, the LM48822 features a 64-step I2C volume control and mute function. The low power Shutdown mode reduces supply cur- rent consumption to 0.06µA. Superior click and pop suppression eliminates audible tran- sients on power-up/down and during shutdown. The LM48822 is available in an ultra-small 16-bump micro SMD package (2mmx2mm) Key Specifications ■ Output Power/channel at V DD = 3.6V R L = 16Ω, THD+N ≤ 1% 35mW (typ) ■ Output Power/channel at V DD = 3.6V R L = 32Ω, THD+N ≤ 1% 40mW (typ) ■ Quiescent Power Supply Current at 3.6V 3.5mA (typ) ■ PSRR at 217Hz 110dB (typ) ■ Shutdown current 0.06μA (typ) Features ■ Ground Referenced Outputs – Eliminates Output Coupling Capacitors ■ Common-Mode Sense ■ Ultra-High PSRR ■ I2C Volume and Mode Control ■ High Output Impedance in Shutdown ■ Differential Inputs ■ Advanced Click-and-Pop Suppression ■ Low Supply Current ■ Minimum external components ■ Micro-power shutdown ■ Available in space-saving 16-bump µSMD package Applications ■ Mobile Phones ■ PDAs ■ Notebook PCs ■ Portable Electronic Devices ■ MP3 Players Boomer® is a registered trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation 300610 www.national.com |
Аналогичный номер детали - LM48822TL |
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Аналогичное описание - LM48822TL |
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