APA2177

APA2177 25mW Stereo Cap-Free Headphone Driver Features General Description Operating Voltage: 2.4V~5.5V Supply Current - IDD=2.1mA at VDD=3.6V Low Shutdown Current - IDD=0.7µA at V =3.6V DD Ground Reference Output - No Output Capacitor Required (for DC Blocking) - Save the PCB Space - Reduce the BOM Costs - Improve the Low Frequency Response Output Power 25mW/Ch into 16Ω at V =3.6V,THD+N=0.04% DD 20mW/Ch into 32Ω at VDD=3.6V,THD+N=0.02% High PSRR: 90dB at 217Hz Fast Start-Up Time: 4ms Integrate the De-pop Circuitry Thermal Protection Surface-Mount Packaging WLCSP1.6x1.6-16 TQFN3x3-16 Applications Handests PDAs Portable Multimedia Devices Notebooks The APA2177 is a stereo, fixed gain, single supply, and cap-free headphone driver, which is available in a WLCSP16 packages. The APA2177 is ground-reference output, and no need the output capacitors for DC blocking. The advantages of eliminating the output capacitor are saving the cost, eliminating component height, and improving the low frequency response. The internal selectable gain (0dB or 6dB) can minimize the external component counts and save the PCB space. High PSRR provides increased immunity to noise and RF rectification. The APA2177 is capable of driving 25mW at 3.6V into 16Ω load and provides thermal protection. Simplified Application Circuit Stereo Input Signal RINRIN+ LIN+ LIN- Shutdown SDN Control Gain Control Hi-Z Control GAIN HI-Z APA2177 Stereo Headp...