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LM4935RL/NOPB Datasheet(PDF) 2 Page - Texas Instruments |
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LM4935RL/NOPB Datasheet(HTML) 2 Page - Texas Instruments |
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2 / 90 page  LM4935, LM4935RLEVAL SNAS296E – OCTOBER 2005 – REVISED MAY 2013 www.ti.com 1.3 Applications • Smartphones • Mobile Phones and Multimedia Terminals • PDAs, Internet Appliances and Portable Gaming • Portable DVD/CD/AAC/MP3 Players • Digital Cameras/Camcorders 1.4 Description The LM4935 is an integrated audio subsystem that supports both analog and digital audio functions. The LM4935 includes a high quality stereo DAC, a mono ADC, a multi-purpose SAR ADC, a stereo headphone amplifier, which supports output cap-less (OCL) or AC-coupled (SE)modes of operation, a mono earpiece amplifier and a mono high efficiency loudspeaker amplifier. It is designed for demanding applications in mobile phones and other portable devices. The LM4935 features a bi-directional I2S serial interface for full range audio and an I2C™ or SPI compatible interface for control. The stereo DAC path features an SNR of 88 dB with an 18-bit 48 kHz input. In SE mode the headphone amplifier delivers at least 33 mWRMS to a 32Ω single-ended stereo load with less than 1% distortion (THD+N) when A_VDD = 3.3V. The mono earpiece amplifier delivers at least 115 mWRMS to a 32Ω bridged-tied load with less than 1% distortion (THD+N) when A_VDD = 3.3V. The mono speaker amplifier delivers up to 600 mW into an 8 Ω load with less than 1% distortion when LS_VDD = 3.3V and up to 1.3W when LS_VDD = 5.0V. The LM4935 also contains a general purpose SAR ADC for housekeeping duties such as battery and temperature monitoring. This can also be used for analog volume control of the output stages and can trigger interrupt events. The LM4935 employs advanced techniques to reduce power consumption, to reduce controller overhead to speed development time and to eliminate click and pop. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. It is therefore ideally suited for mobile phone and other low voltage applications where minimal power consumption, PCB area and cost are primary requirements. This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. 2 Introduction Copyright © 2005–2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: LM4935 LM4935RLEVAL |
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