LM49321, LM49321RLEVAL
www.ti.com SNAS457C – SEPTEMBER 2008 – REVISED MAY 2013 LM49321
Audio Sub-System with Stereo DAC, Mono Class
AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression
Check for Samples: LM49321, LM49321RLEVAL FEATURES DESCRIPTION The LM49321 is an integrated audio sub-system
designed for mono voice, stereo music cell phones
connecting to base band processors with mono
differential analog voice paths. Operating on a 3.3V
supply, it combines a mono speaker amplifier
delivering 520mW into an 8Ω load, a stereo
headphone amplifier delivering 36mW per channel
into a 32Ω load, and a mono earpiece amplifier
delivering 55mW into a 32Ω load. The headphone
amplifier can be configured for output capacitor-less
(OCL) or single-ended (SE) mode. It integrates the
audio amplifiers, volume control, mixer, and power
management control all into a single package. In
addition, the LM49321 routes and mixes the singleended stereo and differential mono inputs into
multiple distinct output modes. The LM49321 features
an I2S serial interface for full range audio and an I2C
or SPI compatible interface for control. The full range
music path features an SNR of 85dB with up to
192kHz playback. 1 2 8-Bit Stereo DAC with up to 192kHz Sampling …
