Datasheet4U Logo Datasheet4U.com

LM49250 - Enhanced Emissions Suppression Stereo Class D Audio Sub-System

General Description

The LM49250 is a fully integrated audio subsystem designed for stereo cell phone applications.

Key Features

  • a new circuit technology that utilizes a charge pump to generate a negative supply voltage. This allows the headphone outputs to be biased about ground, thereby eliminating the output-coupling capacitors. For improved noise immunity, the LM49250 features fully differential left, right and mono inputs. The three inputs can be mixed/multiplexed to any output combination of the loudspeaker, headphone or earpiece amplifiers. The left and right differential inputs can be used as separate single-ended.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
LM49251 Stereo Audio Subsystem Texas Instruments
LM49200 Stereo Class AB Audio Subsystem Texas Instruments
LM49200TLEVAL Stereo Class AB Audio Subsystem Texas Instruments
LM4921 Low Voltage I2S 16-Bit Stereo DAC Texas Instruments
LM4923 1.1 Watt Fully Differential Audio Power Amplifier Texas Instruments

Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
LM4925 2 Cell/ Single Ended Output 40mW Stereo Headphone Audio Amplifier
LM4920 Stereo Headphone Amplifier
LM4921 Low Voltage I2S 16-Bit Stereo DAC
LM4922 80mW Stereo Headphone Amplifier
LM4923 1.1 Watt Fully Differential Audio Power Amplifier

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LM49250 Enhanced Emissions Suppression Stereo Class D Audio Sub-System with Ground Referenced Headphone Amplifier and Mono Earpiece www.DataSheet4U.com December 15, 2008 LM49250  Enhanced Emissions Suppression Stereo Class D Audio Sub-System with Ground Referenced Headphone Amplifier and Mono Earpiece General Description The LM49250 is a fully integrated audio subsystem designed for stereo cell phone applications. The LM49250 combines a 2.4W/Ch stereo class D speaker amplifiers with a 45mW/Ch stereo ground referenced headphone amplifier, a class AB earpiece amplifier, National 3D enhancement, volume control, and an input mixer into a single device. The filterless class D amplifiers deliver 1.2W/Ch into an 8Ω load with <1% THD +N from a 5V supply.