- High-performance 96 dB SNR stereo DAC
- High-performance 94 dB SNR stereo ADC
- Stereo audio playback up to 192kHz
- Stereo recording up to 48kHz
-
Double bidirectional I 2 S or PCM audio interface compatible
-
Read/Write I 2 C compatible control interface
- Flexible digital mixer and sample rate conversion
- Dual Sigma-△ phase-locked loops operate any clock at any sample rate
- Digital 3D stereo enhancement
- Dual-band parametric equalizer 5
- Cascading DSP effect equalizes 10-band parameters
- ALC/compressor/limiter in both DAC and ADC paths
- Ultra-low EMI, spread spectrum control for Class D speaker amplifiers
- The upper output limit of the ground reference is not operated by a headphone amplifier
- The handset and the mono differential line that reduces power consumption consume the application mode of the speaker amplifier
- Mono stereo auxiliary input or differential input
- Differential stereo single-ended microphone input options
- For digital audio input, stereo microphone input, and stereo auxiliary input automatic level control
- Flexible audio routing from input to output
- 16 steps for 2dB microphone volume control
- 32 steps are 1.5 dB steps to assist in input volume control
- Micropower shutdown mode
- Available in a 3.5 x 3.5 mm 36-bump micro SMD package
illustrate
The LM49350 is a high-performance audio subsystem that supports both analog and digital audio capabilities. The LM49350 includes a high-quality stereo DAC, high-quality stereo ADC, stereo headphone amplifier, output cap support for ground reference, less operation, dual-mode headphone speaker amplifier, and low EMI Class D speaker amplifier. It is designed for demanding applications such as mobile phones and other portable devices.
LM49350 uses double bidirectional I 2 Full range of audio and I S or PCM audio interfaces 2 C compatible interface control. Stereo DAC path function with 24-bit 48 kHz input a 96 dB SNR. The headphone amplifier delivers 69MW RMS (typical) to 32Ω DD=3.3V at a single-ended stereo load of less than 1% distortion (THD+N) A_V 3.3V. The earpiece speaker amplifier provides 58MW RMS (typical) to 32Ω bridge hook less than 1% distortion load (THD+N) when A_V DD=3.3V. The speaker amplifier delivers 495mW at 8Ω load with less than 1% distortion LS_V DD=3.3V and up to 1.2W LS_V DD = 5.0V。
LM49350 uses advanced technology to reduce power consumption, reduce controller overhead, speed up development time, and eliminate noise. Boomer audio power amplifiers are designed to provide high quality output power with a small amount of external components. This makes them ideal for use in mobile phones and other low-voltage applications, with minimal power consumption, PCB area and cost.
Key specifications:
|
P HP at A_V DD = 3.3V, stereo 32Ω, 1% THD
|
69mW/ch (typical)
|
|
P LS at LS_V DD = 5V, 8Ω, 1% THD
|
1.2W (typical)
|
|
P LS at LS_V DD = 4.2V, 8Ω, 1% THD
|
825mW (typical)
|
|
P LS at LS_V DD = 3.3V, 8Ω, 1% THD
|
495mW (typical)
|
|
P EP at A_V DD = 3.3V, 32 Ω BTL, 1% THD
|
58MW (typical)
|
|
■ Supply voltage range D_V DD = 1.7V to 2.0V LS_V DD and A_V DD = 2.7V to 5.5V I/O_V DD = 1.6V to 4.5V
|
|
|
SNR (Stereo DAC at 48kHz)
|
96 dB (typical)
|
|
SNR (at 48kHz stereo ADC)
|
94 dB (typical)
|
|
Turn off the current
|
2.3μA (typical)
|
|
PSRR at 217 Hz, A_V DD = 3.3V, (from AUX HP)
|
97 dB (typical)
|
apply
- Smartphone
- Mobile phones and VoIP phones
- Portable GPS navigator and portable gaming device
- Portable DVD/CD/AAC/MP3/MP4 player
- Digital camera/camcorder
|