LM49155 Datasheet - National Semiconductor Corporation

LM49155 Uplink Noise Suppression & Downlink SNR Enhancement Analog Audio Subsystem

The LM49155 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. The LM49155 combines a Noise Suppression microphone amplifier, a 1.35W mono class D amplifier with ALC, class AB earpiece driver with AGC, a high efficiency, stereo, ground referenc.

LM49155 Features

* analog fully differential input, and differential output microphone amplifier designed to reduce background acoustic noise, while delivering superb speech clarity in voice communication applications. Downlink SNR enhancement with an advanced acoustic AGC technology to adjust output levels. The LM491

LM49155_NationalSemiconductorCorporation.pdf