The LM48824 is a Class G, ground-referenced stereo headphone amplifier designed for
portable devices. The LM48824 features TI’s ground-referenced architecture, which eliminates the
large DC blocking capacitors required by traditional headphone amplifiers, saving board space and
minimizing system cost.
The LM48824 takes advantage of TI’s patent-pending Class G architecture offering power
savings compared to a traditional Class AB headphone amplifier. Additionally, output noise is
improved by common-mode sensing that corrects for any differences between the amplifier ground and
the potential at the headphone return terminal, minimizing noise created by any ground
A high output impedance mode allows the LM48824's outputs to be driven by an external
source without degrading the signal. Other features include flexible power supply requirements,
differential inputs for improved noise rejection, a low power (2.5μA) shutdown mode, and a 32-step
I2C volume control with mute function.
The LM48824's superior click and pop suppression eliminates audible transients on
power-up/down and during shutdown. The LM48824 is available in an ultra-small 16-bump, 0.4mm pitch
DSBGA package (1.69mm x 1.69mm)
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