LM49120TLEVAL

LM49120, LM49120TLEVAL www.ti.com SNAS431C – JUNE 2008 – REVISED MAY 2013 LM49120 Audio Sub-System with Mono Class AB Loudspeaker Amplifier and Stereo OCL/SE Headphone Amplifier Check for Samples: LM49120, LM49120TLEVAL FEATURES 1 2 RF Immunity Selectable OCL/SE Headphone Drivers 32 Step Volume Control Click and Pop Suppression Independent Speaker and Headphone Gain Settings Minimum External Components Thermal Over Load Protection Micro-power Shutdown Space Saving 16–bump DSBGA Package Thermal Shutdown Protection Micro-power Shutdown I2C Control Interface DESCRIPTION The LM49120 is a compact audio subsystem designed for portable handheld applications such as cellular phones. The LM49120 combines a mono 1.3W speaker amplifier, stereo 85mW/ch output capacitorless headphone amplifier, 32 step volume control, and an input mixer/multiplexer into a single 16–bump DSBGA package. The LM49120 has three input channels: two singleended stereo inputs and a differential mono input. Each input features a 32-step digital volume control. The headphone output stage features an 8 step (18dB – 0dB) attenuator, while the speaker output stage has two selectable (0dB/+6dB) gain settings. The digital volume control and mode control are programmed through a two-wire I2C compatible interface. APPLICATIONS Mobile Phones PDAs Portable Electronics KEY SPECIFICATIONS Output Power at VDD = 5V: – Speaker: RL = 8Ω BTL, THD+N ≤ 1%: 1.3W (typ) – Headphone: RL = 32Ω, SE...