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LM4931

Texas Instruments
Part Number LM4931
Manufacturer Texas Instruments
Description Audio Subsystem
Published May 19, 2023
Detailed Description LM4931 www.ti.com SNAS251E – APRIL 2004 – REVISED MAY 2013 LM4931 Boomer™ Audio Power Amplifier Series Audio Subsyste...
Datasheet PDF File LM4931 PDF File

LM4931
LM4931

Overview
LM4931 www.
ti.
com SNAS251E – APRIL 2004 – REVISED MAY 2013 LM4931 Boomer™ Audio Power Amplifier Series Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers Check for Samples: LM4931 FEATURES 1 •23 18-bit 44.
1kHz or 48kHz Stereo DAC • 16-bit 8kHz , 12kHz , 16kHz, or 24kHz Voice- Band Codec • PLL for Operation from Common System Clocks • Either I2C or SPI Compatible Serial Interface • I2S Digital Audio Data Serial Interface • PCM Voice Audio Data Serial Interface • Differential Analog Microphone Input • 26mW/Channel Stereo Headphone Amplifier • 570mW Mono High Efficiency BTL 8Ω Amplifier • 32-step Volume Control for Audio Output Amplifiers with 1.
5dB Step Size.
• Unity-Gain Stable Headphone Amplifiers • No Snubber Networks or Bootstrap Capacitors are Required by the Headphone or Hands-Free Amplifiers • Adjustable Digital Side-Tone Attenuation • 16-step Volume Control for Microphone Preamp with 2dB Step Size • Configurable GPIO/Status Port • Available in the 42 bump DSBGA Package APPLICATIONS • 2.
5 and 3G Mobile Phones and Multimedia Terminals • PDAs, Internet Appliances and Portable Gaming • Portable DVD/CD/AAC/MP3 Players • Digital Cameras and Toys KEY SPECIFICATIONS • PLS OUT at AVDD = 5V, 8Ω – 1% THD+N, 1.
1W (Typ) • PLS OUT at AVDD = 3.
3V, 8Ω – 1% THD+N, 570mW (Typ) • PH/P OUT at AVDD = 5V & AVDD = 3.
3V, 32Ω – 1% THD+N, 26mW (Typ) • Supply Voltage Range – DVDD, 2.
7V to 4.
0V – AVDD, 2.
7V to 5.
0V(1) • Shutdown Current, 1.
1µA • PSRR at 217Hz, AVDD = 3V, 62dB (Typ) • SNR (Voice Codec), 75dB (Typ) • SNR (Audio DAC), 86dB (Typ) DESCRIPTION The LM4931 is an integrated audio subsystem that supports voice and digital audio functions.
The LM4931 includes a high quality stereo DAC, voice band codec, a stereo headphone amplifier and a high-power high efficiency mono speaker amplifier.
It is primarily designed for demanding applications in mobile phones and other portable devices.
The LM4931 features an I2S serial interface for full range a...


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