LM49352RL

• Product Introduction

 peculiarity   Ultra-high efficiency, spread spectrum Class D speaker amplifier at 93% efficiency Low voltage, realistic headphone amplifier operation High-performance 103dB signal-to-noise ratio stereo DAC High-performance 97 dB SNR stereo ADC Stereo audio playback up to 96kHz Stereo recording up to 48kHz Dual bidirectional I 2S or PCM audio interfaces are compatible Read/write I 2C compatible control interface Flexible digital mixer with sample rate conversion The Sigma-ΔPLL clock network supports system clocks up to 50MHz, including 13MHz, 19.2MHz, and 26MHz Dual stereo 5-band parametric equalizer Cascading DSP effect equalizes stereo 10-band parameters ALC/limiter/compressor DAC and ADC paths Dedicated earpiece speaker amplifier Stereo aux input and mono differential input Differential with single-ended option microphone input Digital audio input, mono differential input, microphone input, stereo auxiliary input automatic level control Flexible audio routing from input to output Volume control with 16-step 2dB step microphone 32-step 1.5 dB step auxiliary input volume control Volume control of Class D speaker amplifiers in 4 steps 8-step volume control headphone amplifier Micropower shutdown mode Available in 3.3 mm × 3.3 mm 36-bump micro SMD packages   illustrate LM49352 is a high-performance mixed-signal audio subsystem. LM49352 include high-quality stereo DAC, high-quality stereo ADC, stereo headphone amplifier, support for realistic operation, low EMI Class D speaker amplifier, earpiece speaker amplifier. It combines advanced audio processing, conversion, mixing, and amplification in the smallest possible volume while extending the battery life of a feature-rich portable device. LM49352 functions dual bidirectional I 2S or PCM audio interfaces and I 2C compatible interface control. Stereo DAC path function with 103dB signal-to-noise ratio with 24-bit 48 kHz input. The headphone amplifier provides 65mW of RMS (typical) less than 1% distortion (THD+N) with a 32Ω single-ended stereo load HP_V DD=2.8V. The speaker amplifier provides a distortion of less than 1% LS_V 970mW to an 8Ω load DD = 4.2V. LM49352 incorporates advanced technology to extend battery life, reduce controller overhead, reduce development time, and eliminate clicks and pop-up artifacts. Boomer audio power amplifiers are designed for mobile devices and require minimal PCB area and external components. Key specifications: Efficiency of Class D amplifiers 93% (typical) P EP A_V DD = 3.3V，32Ω，1％THD 58MW (typical) P HP in HP_V DD = 2.8V, stereo 32Ω, 1% total harmonic distortion 65mW/ch (typical) LS LS_V DD = 5V, 8Ω, 1% THD 1.4W (typical) LS LS_V DD = 4.2V, 8Ω, 1% THD 970mW (typical) LS LS_V DD = 3.3V, 8Ω, 1% THD 590mW (typical) SNR (Stereo DAC at 48kHz) 103 dB (typical) PSRR A_V DD = 3.3V at 217 Hz (HP from AUX) 100 dB (typical)

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