The LM4985 is a stereo audio power amplifier with internal digitally controlled volume control. This amplifier is capable of delivering 68mWRMS per channel into a 16 load or 38mWRMS per channel into a 32 load at 1% THD when powered by a 3.6V power supply and operating in the OCL mode.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. To that end, the LM4985 features two functions that optimize system cost and minimize PCB area: an integrated, digitally controlled (I2C bus) volume control and an operational mode that eliminates output signal coupling capacitors (OCL mode). Since the LM4985 does not require bootstrap capacitors, snubber networks, or output coupling capacitors, it is optimally suited for low-power, battery powered portable systems.
| LM4985 | |
| Headphone Channels | Stereo |
| Volume Control | Yes |
| Supply Max (Max) (Volt) | 5.5 |
| Supply Min (Min) (Volt) | 2.2 |
| THD (%) | 0.08 |
| Output Power (W) | 0.135 |
| Load (Min) (ohms) | 16 |
| ISD (uA) | 0.1 |
| PSRR (dB) | 77 |
