Audio Sub-System With Dual-Mode Stereo Headphone & Mono High Efficiency Loudspeaker Amplifiers And Multi-Purpose ADC

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 32 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 32 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 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.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM4935RLX/NOPB Texas Instruments Audio Sub-Sys w/ Dual-Mode Stereo Headphone Mono High Efficiency Loudspkr Amps & Multi-Purpose ADC 49-DSBGA -40 to 85
LM4935RL/NOPB Texas Instruments Audio Sub-Sys w/ Dual-Mode Stereo Headphone Mono High Efficiency Loudspkr Amps & Multi-Purpose ADC 49-DSBGA -40 to 85
LM49352RL/NOPB Texas Instruments Mono Class D Audio Codec Subsytem w/ Gnd Referenced Headphone Amps, Earpiece Driver, & Audio DSP 36-DSBGA -40 to 85
LM49350RLX/NOPB Texas Instruments High Perf Codec Sub-Sys w/ Gnd-Ref St Headph Amp Ultra Low EMI Class D Loudspkr Amp 36-DSBGA -40 to 85
LM49350RL/NOPB Texas Instruments High Perf Codec Sub-Sys w/ Gnd-Ref St Headph Amp Ultra Low EMI Class D Loudspkr Amp 36-DSBGA -40 to 85
LM49352RLX/NOPB Texas Instruments Mono Class D Audio Codec Subsytem w/ Gnd Referenced Headphone Amps, Earpiece Driver, & Audio DSP 36-DSBGA -40 to 85
LM4935 's PackagesLM4935 's pdf datasheet
LM4935RL
LM4935RLX




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LM4935 Application circuits
LM4935 circuits
This is one application circuit of LM4935,If you need more circuits,please download LM4935's pdf datasheet.


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