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The LM4930 is an integrated audio subsystem that supports voice and digital audio functions. The LM4930 includes a high quality I2S input stereo DAC, a voice band codec, a stereo headphone amplifier and a high-power mono speaker amplifier. It is primarily designed for demanding applications in mobile phones and other portable devices.
The LM4930 features an I2S serial interface for full range audio, a 16-bit PCM bi-directional serial interface for the voice band codec and an two-wire interface for control. The full range music path features an SNR of 86dB with a 16-bit 48kHz input. The stereo DAC can also be used while the voice codec is in use. The headphone amplifier delivers 25mWRMS to a 32Ω single-ended stereo load with less than 0.5% distortion (THD+N) when AVDD = 3V. The mono speaker amplifier delivers up to 330mW into an 8Ω load with less than 1% distortion when AVDD = 3V.
The LM4930 employs advanced techniques to reduce power consumption, to reduce controller overhead 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 is a primary requirement.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LM4930 Audio Subsystem w/Stereo Headphone - Mono Speaker Amps datasheet (Rev. C) | 01 May 2013 | |
| Application note | Out-of-Band Noise Measurement Issues for Audio Devices (Rev. A) | 31 Dec 2019 | ||
| Application note | Audio Serial Interface Configurations for Audio Codecs (Rev. A) | 27 Jun 2019 | ||
| Application note | Using the MSP430 Launchpad as a Standalone I2C Host for Audio Products (Rev. A) | 28 Oct 2013 | ||
| Application note | Solving Enumeration Errors in USB Audio DAC and CODEC Designs | 30 Oct 2009 | ||
| Application note | Configuring I2S to Generate BCLK from Codec Devices & WCLK from McBSP Port | 08 Jul 2009 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| DSBGA (YZR) | 36 | Ultra Librarian |
| WQFN (NJN) | 44 | Ultra Librarian |
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