PDF APA2177 Data sheet ( Hoja de datos )

Número de pieza	APA2177
Descripción	25mW Stereo Cap-Free Headphone Driver
Fabricantes	ANPEC
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No Preview Available ! 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 V =3.6V,THD+N=0.02% DD • High PSRR: 90dB at 217Hz • Fast Start-Up Time: 4ms • Integrate the De-pop Circuitry • Thermal Protection • Surface-Mount Packaging WLCSP1.6x1.6-16 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 WLCSP- 16 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, elimi- nating 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 RIN- RIN+ LIN+ LIN- Shutdown SDN Control Gain Control Hi-Z Control GAIN HI-Z APA2177 Stereo Headphone ROUT LOUT ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Copyright © ANPEC Electronics Corp. Rev. A.1 - Jul., 2012 1 www.anpec.com.tw 1 page APA2177 Pin Description PIN WLCS P A1 Name SDN A2 VDD A3 LOUT A4 LIN- B1 GND B2 CPP B3 HPVDD B4 LIN+ C1 CPN C2 HPVSS C3 SGND C4 RIN+ D1 HI-Z D2 GAIN D3 ROUT D4 RIN- I/O/P Function Description I Shutdown mode control pin. A low-level voltage applied on this pin shuts off the headphone driver. P Supply voltage input pin. O Left channel output for headphone. I Left channel audio signal inverting input pin. P Ground connection for circuitry. P Charge pump flying capacitor positive connection. P Positive power supply for headphone amplifiers. I Left channel audio signal non-inverting input pin. P Charge pump flying capacitor negative connection. P Charge pump output. I Amplifier reference voltage. I Right channel audio signal non-inverting input pin. Output impedance select. Set to logic LOW for normal operation and logic HIGH for high output I impedance. I Gain select. Set to logic LOW for a gain of 0dB and to HIGH for a gain of 6dB. O Right channel output for headphone. I Right channel audio signal inverting input pin. Copyright © ANPEC Electronics Corp. Rev. A.1 - Jul., 2012 5 www.anpec.com.tw 5 Page APA2177 Block Diagram Copyright © ANPEC Electronics Corp. Rev. A.1 - Jul., 2012 11 www.anpec.com.tw 11 Page

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