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)
apply
- 智能手机
- 移动电话和VoIP电话
- 便携式GPS导航和便携式游戏设备
- 便携式DVD/CD/AAC/MP3/MP4玩家
- 数码相机/摄像机