LM49101

LM49101, LM49101TMEVAL www.ti.com SNAS475A – MARCH 2009 – REVISED APRIL 2013 LM49101 Mono Class AB Audio Subsystem with a True Ground Headphone Amplifier and Earpiece Switch Check for Samples: LM49101, LM49101TMEVAL FEATURES 1 2 Differential Mono Input and Stereo SingleEnded Input Separate Earpiece (Receiver) Differential Input Analog Switch for a Separate Earpiece Path 32-Step Digital Volume Control (-80 to +18dB) Three Independent Volume Channels (Left, Right, Mono) Separate Headphone Volume Control Flexible Output for Speaker and Headphone Output True Ground Headphone Amplifier Eliminates Large DC Blocking Capacitors Reducing PCB Space and Cost Hardware Reset Function RF Immunity Topology “Click and Pop” Suppression Circuitry Thermal Shutdown Protection Micro-Power Shutdown I2C Control Interface Available in Space-Saving DSBGA Package KEY SPECIFICATIONS Supply Voltage (VDDLS): 2.7V ≤ VDDLS ≤ 5.5V Supply Voltage (VDDHP): 1.8V ≤ VDDHP ≤ 2.9V I2C Supply Voltage: 1.7V ≤ I2CVDD ≤ 5.5V Output Power, VDDLS = 5V, VDDHP = 2.75V, 1% THD+N – RL = 8Ω Speaker 1.3W (Typ) – RL = 32Ω Headphone 45mW (Typ) Output Power VDDLS = 3.3V, VDDHP = 2.75V, 1% THD+N – RL = 8Ω Speaker 540W (Typ) – RL = 32Ω Headphone 40mW (Typ) PSRR: VDD = 3.3V, 217Hz Ripple, Mono In: 90dB (Typ) Shutdown Power Supply Current: 0.01μA (Typ) APPLICATIONS Portable Electronic Devices Mobile Phones PDAs DESCRIPTION The LM49101 is a fully integrated audio subsystem with a...