APA2718

APA2178 100mW Stereo Cap-Free Headphone Driver Features General Description The APA2178 is a stereo, fixed gain, Cap-Free headphone driver which is available in a WLCSP2x2-16 package. The APA2178 is a ground-reference output, and doesn’ t need the output capacitors for DC blocking. The advantages of eliminating the output capacitor are saving the cost, PCB’ s space, and component height. The built-in gain setting can minimize the external component counts and save the PCB space. High PSRR provides increased immunity to noise and RF rectification. In addition to these features, a fast startup time and small package size make the APA2178 an ideal choice for portable multimedia device. Moreover, the APA2178 is also equipped other features. For example, it is capable of driving 100mW at 3.3V into 16Ω, at THD+N=10% and provides thermal and short circuit protection. No Output Capacitor Required Operating Voltage: 1.8V~4.5V Supply Current – IDD=5mA at VDD=3.3V Low Shutdown Current – IDD=1µA at VDD=3.3V Meeting VISTA Requirements Output Power at 1% THD+N – 70mW, at VDD=3.3V, RL = 16Ω at 10% THD+N – 100mW, at VDD=3.3V, RL = 16Ω Less External Components Required High PSRR: 78dB at 217Hz Short-Circuit and Thermal Protection ± 8KV ESD Performance Surface-Mount Packaging – WLCSP2x2-16 Lead Free and Green Devices Available (RoHS Compliant) Applications Handsets PDAs Portable multimedia devices Notebooks Simplified Application Circuit R-CH Input RIN ...