The following is the circuit diagram of [MAX97220 differential input headphone amplifier application circuit]
The MAX97220A/B is a differential input line/headphone amplifier that can drive 1K ohm line load at 3VRMS at 5V supply and 600Ω line load at 2VRMS at 3.3V supply. Operating voltage is 2.5V-5.5V, DirectDrive output, no need DC blocking capacitors, THD+N is better than 90dB, and 18-bit SNR performance is 112dB. It is mainly used in STB, Blu-ray and DVD players, LCD TVs and audio equipment.
MAX97220 application:
Set-Top Boxes
Blu-rayK and DVD Players
LCD Televisions
Prosumer Audio Devices
Figure 1. Functional block diagram of the MAX97220
Figure 2. Simplified block diagram of the MAX97220
Figure 3. MAX97220A and MAX9722 PCB layout
Figure 4. MAX97220A/B gain setting diagram
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