LM49321 Series

520-mW, mono, analog & digital input Class-AB audio amplifier with 36-mW headphone amplifier

Catalog

520-mW, mono, analog & digital input Class-AB audio amplifier with 36-mW headphone amplifier

Part	Voltage - Supply [Min]	Voltage - Supply [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Type	Features	Supplier Device Package	Output Type	Max Output Power x Channels @ Load	Package / Case	Mounting Type
Texas Instruments LM49321RL/NOPB	2.7 V	5.5 V	85 °C	-40 °C	Class AB	Depop I2C I2S Shutdown SPI Volume Control	36-uSMD	1-Channel (Mono) with Mono and Stereo Headphones	1.25 W 80 mW	36-WFBGA	Surface Mount
Texas Instruments LM49321RLX/NOPB	2.7 V	5.5 V	85 °C	-40 °C	Class AB	Depop I2C I2S Shutdown SPI Volume Control	36-uSMD	1-Channel (Mono) with Mono and Stereo Headphones	1.25 W 80 mW	36-WFBGA	Surface Mount

Catalog

520-mW, mono, analog & digital input Class-AB audio amplifier with 36-mW headphone amplifier

Key Features

• 8-Bit Stereo DAC with up to 192kHz Sampling RateMultiple Distinct Output ModesMono Class AB Speaker AmplifierStereo OCL/SE Headphone AmplifierMono Earpiece AmplifierDifferential Mono Analog InputSingle-Ended Analog InputsIndependent Loudspeaker, Headphone and Mono Earpiece Volume controlsI2C/SPI (Selectable) Compatible InterfaceUltra Low Shutdown CurrentClick and Pop Suppression CircuitKey SpecificationsPOUTLS, 8Ω, 3.3V, 1% THD+N: 520 mW (Typ)POUTHP, 32Ω, 3.3V, 1% THD+N: 36 mW (Typ)POUTMono Earpiece, 32Ω, 1% THD+N: 55 mW (Typ)Shutdown Current: 0.6 µA (Typ)SNR (DAC + Amplifier): 85 dB (Typ)All trademarks are the property of their respective owners.8-Bit Stereo DAC with up to 192kHz Sampling RateMultiple Distinct Output ModesMono Class AB Speaker AmplifierStereo OCL/SE Headphone AmplifierMono Earpiece AmplifierDifferential Mono Analog InputSingle-Ended Analog InputsIndependent Loudspeaker, Headphone and Mono Earpiece Volume controlsI2C/SPI (Selectable) Compatible InterfaceUltra Low Shutdown CurrentClick and Pop Suppression CircuitKey SpecificationsPOUTLS, 8Ω, 3.3V, 1% THD+N: 520 mW (Typ)POUTHP, 32Ω, 3.3V, 1% THD+N: 36 mW (Typ)POUTMono Earpiece, 32Ω, 1% THD+N: 55 mW (Typ)Shutdown Current: 0.6 µA (Typ)SNR (DAC + Amplifier): 85 dB (Typ)All trademarks are the property of their respective owners.

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 single-ended 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. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components. 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 single-ended 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. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components.