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LM49150TLEVAL Datasheet(PDF) 1 Page - Texas Instruments |
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LM49150TLEVAL Datasheet(HTML) 1 Page - Texas Instruments |
1 / 31 page LM49150, LM49150TLEVAL www.ti.com SNAS439B – AUGUST 2008 – REVISED MARCH 2009 LM49150 Mono Class D Audio Subsystem with Earpiece Driver and Stereo Ground Referenced Headphone Amplifiers Check for Samples: LM49150, LM49150TLEVAL 1 FEATURES DESCRIPTION The LM49150 is a fully integrated audio subsystem 23 • E2S Class D Amplifier designed for portable handheld applications such as • Ground Referenced Headphone Outputs — cellular phones. Part of TI's PowerWise™ product Eliminates Output Coupling Capacitors family, the LM49150 consumes very low power in the • I2C Volume and Mode Control various modes of operation and still providing great audio performance. The LM49150 combines a 1.25W • Mono Earpiece Amplifier mono E2S (Enhanced Emission Suppression) class D • Flexible Output for Speaker and Headphone amplifier, 135mW Class AB earpiece amplifier, Output 42mW/channel stereo ground reference headphone • 20–Bump DSBGA Package amplifiers, volume control, and mixing circuitry into a single device. • Soft Enable Function The filterless class D amplifier delivers 1.25W into an • “Click and Pop” Suppression Circuitry 8 Ω load with <1% THD+N with a 5V supply. The E2S • Thermal Shutdown Protection class D amplifier features a patented, ultra low EMI • Low Supply Current PWM architecture that significantly reduces RF • Micro-Power Shutdown emissions while preserving audio quality. The 42mW/channel headphone drivers feature TI’s ground referenced architecture that creates a ground- APPLICATIONS referenced output from a single supply, eliminating • Mobile Phones the need for bulky and expensive DC-blocking • PDAs capacitors, saving space and minimizing cost. • Portable Electronics The LM49150 features a fully differential mono input, and two single-ended stereo inputs. The three inputs can be mixed/multiplexed to either the speaker or headphone amplifiers. Each input channel has an independent, 32-step digital volume control. The headphone output stage features an additional, 8- step gain control, while the speaker output stage has a selectable 6dB or 12dB gain. The mixer, volume control and device mode select are controlled through an I2C compatible serial interface. The LM49150’s superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM49150 is available in a ultra- small 20-bump DSBGA package (2.225mm X 2.644mm). These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 PowerWise is a trademark of Texas Instruments. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2008–2009, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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