With its directly-coupled output technology, the LM48821 is a variable gain audio power amplifier capable of delivering 52mWRMS per channel into a 16Ω single-ended load with less than 1% THD+N from a 3V power supply. The I 2C volume control has a range of –76dB to 18dB.
The LM48821's Tru-GND technology utilizes advanced charge pump technology to generate the LM48821’s negative supply voltage. This eliminates the need for output-coupling capacitors typically used with single-ended loads.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM48821 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement
| LM48821 | |
| Headphone Channels | Stereo |
| Volume Control | Yes |
| Supply Max (Max) (Volt) | 4 |
| Supply Min (Min) (Volt) | 1.6 |
| THD (%) | 0.011 |
| Output Power (W) | 0.093 |
| Load (Min) (ohms) | 16 |
| ISD (uA) | 0.1 |
| PSRR (dB) | 82 |
