LM49120 Series

1.3-W, stereo, analog input Class-AB audio amplifier with I2C interface

Catalog

1.3-W, stereo, analog input Class-AB audio amplifier with I2C interface

Part	Type	Output Type	Max Output Power x Channels @ Load	Features	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Min]	Voltage - Supply [Max]	Supplier Device Package	Package / Case	Mounting Type
Texas Instruments LM49120TL/NOPB	Class AB	1-Channel (Mono) with Stereo Headphones	1.3 W 85 mW	Depop I2C Mute Shutdown Thermal Protection Volume Control	85 °C	-40 °C	2.7 V	5.5 V	16-DSBGA	16-WFBGA DSBGA	Surface Mount
Texas Instruments LM49120TLX/NOPB	Class AB	1-Channel (Mono) with Stereo Headphones	1.3 W 85 mW	Depop I2C Mute Shutdown Thermal Protection Volume Control	85 °C	-40 °C	2.7 V	5.5 V	16-DSBGA	16-WFBGA DSBGA	Surface Mount

Catalog

1.3-W, stereo, analog input Class-AB audio amplifier with I2C interface

Key Features

• RF ImmunitySelectable OCL/SE Headphone Drivers32 Step Volume ControlClick and Pop SuppressionIndependent Speaker and Headphone Gain SettingsMinimum External ComponentsThermal Over Load ProtectionMicro-power ShutdownSpace Saving 16–bump DSBGA PackageThermal Shutdown ProtectionMicro-power ShutdownI2C Control InterfaceKey SpecificationsOutput Power at VDD = 5V:Speaker: RL = 8Ω BTL, THD+N ≤ 1%: 1.3W (typ)Headphone: RL = 32Ω, SE, THD+N ≤ 1%: 85mW (typ)Output Power at VDD = 3.6V:Speaker: RL = 8Ω, BTL, THD+N ≤ 1%: 632mW (typ)Output Power at VDD = 3.3V:Speaker: RL = 8Ω, BTL, THD+N ≤ 1%: 540mW (typ)Headphone: RL = 32Ω, OCL/SE, THD+N ≤ 1%: 35mW (typ)All trademarks are the property of their respective owners.RF ImmunitySelectable OCL/SE Headphone Drivers32 Step Volume ControlClick and Pop SuppressionIndependent Speaker and Headphone Gain SettingsMinimum External ComponentsThermal Over Load ProtectionMicro-power ShutdownSpace Saving 16–bump DSBGA PackageThermal Shutdown ProtectionMicro-power ShutdownI2C Control InterfaceKey SpecificationsOutput Power at VDD = 5V:Speaker: RL = 8Ω BTL, THD+N ≤ 1%: 1.3W (typ)Headphone: RL = 32Ω, SE, THD+N ≤ 1%: 85mW (typ)Output Power at VDD = 3.6V:Speaker: RL = 8Ω, BTL, THD+N ≤ 1%: 632mW (typ)Output Power at VDD = 3.3V:Speaker: RL = 8Ω, BTL, THD+N ≤ 1%: 540mW (typ)Headphone: RL = 32Ω, OCL/SE, THD+N ≤ 1%: 35mW (typ)All trademarks are the property of their respective owners.

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 single-ended 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. 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 single-ended 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.