The LM49101 is a fully integrated audio subsystem with a mono power amplifier capable of delivering 540mW of continuous average power into an 8Ω BTL speaker load with 1% THD+N using a 3.3V supply. The LM49101 includes a separate stereo headphone amplifier that can deliver 44mW per channel into 32Ω loads using a 2.75V supply.
The LM49101 has four input channels. A pair of single-ended inputs and a fully differential input channel with volume control and amplification stages. Additionally, a bypass differential input is available that connects directly to the mono speaker outputs through an analog switch without any amplification or volume control stages. The LM49101 features a 32–step digital volume control on the input stage and an 8–step digital volume control on the headphone output stage
| LM49101 | |
| Speaker Channels | Mono |
| Speaker Output Power/Ch (W) | 1.3 |
| Speaker PSRR (dB) | 90 |
| Ground Centered Headphone | Yes |
| Headphone Output Power/Ch (mW) | 45 |
| Headphone PSRR (dB) | 85 |
| Audio Mode Control | I2C |
| Supply Voltage (Min) (V) | 2.7 |
| Supply Voltage (Max) (V) | 5.5 |
