The LM48861 is a single supply, ground-referenced stereo headphone amplifier. Part of
TI's PowerWise product family, the LM48861
consumes only 3mW of power, yet still provides great audio performance. The ground-referenced
architecture eliminates the larger DC blocking capacitors required by traditional headphone
amplifier's saving board space and reducing cost.
The LM48861 features 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 mismatches.
The LM48861 delivers 22mW/channel into a 32Ω load with <1% THD+N with a 1.8V supply.
Power supply requirements allow operation from 1.2V to 2.8V. High power supply rejection ratio
(PSRR), 83dB at 217Hz, allows the device to operate in noisy environments without additional power
supply conditioning. A low power shutdown mode reduces supply current consumption to 0.01µA.
Superior click and pop suppression eliminates audible transients on power-up/down and
during shutdown. The LM48861 is available in an ultra-small 12-bump, 0.4mm pitch, DSBGA package
(1.215mm x 1.615mm).
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