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APA2176/A

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270mW Stereo Cap-Free Headphone Driver

Features
  • No Output Capacitor Required
  • Dual Supply Voltage (PVDD>VDD)
- VDD=1.8~5.5V
- PVDD=2.2~5.5V
  • Meeting VISTA Requirements
  • Output Power
at 1% THD+N
- 200mW, at VDD=3.3V, PVDD=5.0V, RL=16Ω
- 55mW, at VDD=1.8V, PVDD=3.0V, 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)

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 time and small package size make the APA2176/2176A an ideal choice for portable multimedia devices. Moreover, the APA2176/2176A is also equipped other features. For example, at THD+N=1%, it is capable of driving 200mW at VDD=3.3V, PVDD=5.0V into 16Ω. In addition, it provides thermal and short circuit protections.

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