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.
View datasheet View product folder