AK4205EN
S/N 124dB THD+N -118dB Headphone Amplifier
Description
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The AK4205 is a stereo headphone amplifier corresponding to high resolution with built-in analog switch for Hi-Fi mobile. The AK4205 achieves industry’s leading level ultra-low noise and ultra-low distortion characteristics (THD+N = -118dB).
The AK4205 is available in a small 36-pin QFN package. It can save the mounting area of the board by including resistors for gain adjustment and low-pass filter.
Key Features
1. Headphone Amplifier
• Full-differential Input
• Built-in Resistors for Gain Adjustment: Fixed to +0.5 dB @1 kHz
• 2nd order Low-pass Filter
• Ultra-Low Noise: S/N 124dB
• Ultra-Low Distortion: THD+N -118 dB @32 Ω, 34 mW THD+N -120 dB @600 Ω, 6.7 mW
2. Analog Switch
• Selector Switch for Hi-Fi Audio path and Auxiliary path
• Ultra-Low Distortion: THD -124dB@32 Ω, 34 mW
• 2 Vrms Output
• Pop & Click Noise Free Switching Control
• Built-in Negative Voltage Generator
• Mute Function
3. Ta = -40 ～ 85℃
4. Power Supply:
• Positive Power Supply (PVDDA, PVDDB): 6.0 V (typ)
• Negative Power Supply (PVEEA, PVEEB): -5.0 V (typ)
• Reference Power Supply (RVDD): 6.0 V (typ)
• Analog Switch Power Supply (SWVDD): 3.3 V (typ)
5. Package:
• 36-pin QFN (5 x 5 mm, 0.4 mm pitch)
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Block Diagram
