The LM48861 is a single supply, ground-referenced stereo headphone amplifier. Part of National'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.
| LM48861 | |
| Headphone Channels | Stereo |
| Supply Max (Max) (Volt) | 3.6 |
| Supply Min (Min) (Volt) | 1.4 |
| THD (%) | 0.04 |
| Ground-Centered Outputs | Yes |
| Output Power (W) | 0.012 |
| Load (Min) (ohms) | 16 |
| ISD (uA) | 0.01 |
| PSRR (dB) | 83 |
