Pinout
Specifications| Power@ 8Ohms, 1% THD | 1.4 Watt |
| THD | .04 % |
| PSRR | 70 dB |
| SNR | 103 dB |
| Channels | 4 Channels |
| THD Conditions | LS, 400mW, f=1kHz, mono input |
| PSRR Conditions | LS, Vrip=200mVpp , f = 217 Hz, Mono Input |
| SNR Conditions | Stereo DAC Input |
| User Supply | 5 Volt |
| Audio Mux | Yes |
| Capless Headphone | Yes |
| ClassD Driver | Yes |
| Interface | I2S, PCM |
| Stereo Inputs | 3 |
| National 3D | No |
| Digital Volume Control Max | 18 dB |
| Digital Volume Control Min | -76.5 dB |
| Supply Range | +2.7 - +5.5 V |
| Mono Inputs | 4 |
| Temperature Min | -40 deg C |
| Temperature Max | 85 deg C |
| Loudspeaker Type | Class D |
| Headphone Type | True Ground |
| AEC Q-100 Automotive Grade | 0 |
| Loudspeaker Outputs | 1 |
| PowerWise | Yes |
| A/D Channels | 2 Channels |
| D/A Channels | 2 |
| View Using Catalog |
DescriptionThe LM49352 is a high performance mixed signal audio subsystem. The LM49352 includes a high quality stereo DAC, a high quality stereo ADC, a stereo headphone amplifier, which supports True Ground operation, a low EMI Class D loudspeaker amplifier, and an earpiece speaker amplifier. It combines advanced audio processing, conversion, mixing, and amplification in the smallest possible footprint while extending the battery life of feature rich portable devices.
The LM49352 features dual bi-directional I 2S or PCM audio interfaces and an I 2C compatible interface for control. The stereo DAC path features an SNR of 103dB with 24-bit 48 kHz input. The headphone amplifier delivers 65mWRMS (typ) to a 32Ω single-ended stereo load with less than 1% distortion (THD+N) when HP_VDD = 2.8V. The loudspeaker amplifier delivers up to 970mW into an 8Ω load with less than 1% distortion when LS_VDD = 4.2V.
The LM49352 employs advanced techniques to extend battery life, to reduce controller overhead, to speed development time, and to eliminate click and pop artifacts. Boomer audio power amplifiers are designed specifically for mobile devices and require minimal PCB area and external components.
Notice: This document is not a full datasheet. For more information regarding this product or to order samples please contact your local National Semiconductor sales office or visit http://www.national.com/support/dir.html
More Application Notes
| Title |
Size in Kbytes |
Date |
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| AN-1432: Application Note 1432 The LM4935 Headset/Push-Button Detection Guide |
464 Kbytes |
24-Apr-06 |
Download |
AN-1432 (Chinese): Application Note 1432 The LM4935 Headset/Push-Button Detection Guide
|
251 Kbytes |
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640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
| AN-1451: Application Note 1451 LM4935 Automatic Gain Control (AGC) Guide |
550 Kbytes |
24-Apr-06 |
Download |
AN-1451 (Chinese): Application Note 1451 LM4935 Automatic Gain Control (AGC) Guide
|
287 Kbytes |
|
640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
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LM49352 Data Sheet
