Datasheet Texas Instruments LM4937 — 数据表

LM4937
www.ti.com LM4937 SNAS369J – OCTOBER 2006 – REVISED MAY 2013 Audio Sub-System with OCL Stereo Headphone
Output and RF Suppression
Check for Samples: LM4937 FEATURES DESCRIPTION The LM4937 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. It integrates the
audio amplifiers, volume control, mixer, and power
management control all into a single package. In
addition, the LM4937 routes and mixes the singleended stereo and differential mono inputs into
multiple distinct output modes. The LM4937 features
an I2S serial interface for full range audio and an I2C
в„ўor SPI compatible interface for control. The full
range music path features an SNR of 85dB with a
192kHz playback. 1 234 18-Bit Stereo DAC
Multiple Distinct Output Modes
Mono Speaker Amplifier
Stereo Headphone Amplifier …