APA2176

APA2176/2176A 270mW Stereo Cap-Free Headphone Driver Features No Output Capacitor Required Dual Supply Voltage (PV >V ) DD DD – VDD=1.8 ~5.5V – PVDD=2.2 ~ 5.5V Meeting VISTA Requirements Output Power at 1% THD+N -200mW, at V =3.3V, DD PV =5.0V, DD RL=16Ω -55mW, at V =1.8V, DD PV =3.0V, DD RL=16Ω at 10% THD+N -270mW, at VDD=3.3V, PVDD=5.0V, RL=16Ω -70mW, at VDD=1.8V, PVDD=3.0V, RL=16Ω Less External Components Required High PSRR: 80dB at 217Hz Fast Start-Up Time : 120µs Short-Circuit and Thermal Protection Surface-Mount Package – TQFN4x4-20B (with Enhanced Thermal Pad) – TSSOP-16 – TQFN3x3-16 (with Enhanced Thermal Pad) (for APA2176A) Lead Free and Green Devices Available (RoHS Compliant) Applications Headsets PDAs Portable Multimedia Devices Notebooks General Description The APA2176/2176A is a stereo, fixed gain, and cap-free headphone driver which is available in TQFN4x4 20-pin, TQFN3x3 16-pin (APA2176A) or TSSOP-16 package. Dual supply voltage provides higher efficiency and better power ripple rejection. The APA2176/2176A is designed with ground-reference output and no 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 start-up ti...