LN4822

25mW Cap-Free Stereo Headphone Amplifier LN4822 ■ GENERAL DESCRIPTION The LN4822 stereo headphone driver is designed for portable equipment where board space is at a premium. Differential stereo inputs and built-in resistors set the device gain, further reducing external component count. Gain is selectable at -6 dB, 0 dB, 3 dB or 6 dB. The amplifier drives 25 mW into 16Ω speakers from a single 2.3 V supply. The LN4822 provides a constant maximum output power independent of the supply voltage, thus facilitating the design for prevention of acoustic shock. The LN4822 features fully differential inputs to reduce system noise pickup between the audio source and the headphone amplifier. The high power supply noise rejection performance and differential architecture provides increased RF noise immunity. For single-ended input signals, connect INL+ and INR+ to ground. The device has built-in pop suppression circuitry to completely eliminate disturbing pop noise during turn-on and turn-of...