The AK4201 is an audio stereo cap-less headphone amplifier. The AK4201 eliminates the need for large DC-blocking capacitors with a built-in Charge-pump circuit. The PSRR (Power supply Rejection Ratio) can achieve to 100dB with a built-in regulator, and it can output 2Vrms with excellent linearity when used as lineout amplifier. The AK4201 is available in tiny 12-pin USON(2.2 X 2.9mm), saving board space, cost, and component height. |
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Applications: PC’s, Mobile phones, Smart Phones, PND’s, Digital Photo Frames
Stereo Cap-less Amplifier (No DC-blocking capacitors required)
High PSRR (100dB at 217Hz)
Output Power:
 65 mW x 2ch @ 16 , AVDD=PVDD=5.0V, THD+N=-40dB
30 mW x 2ch @ 16, AVDD=PVDD=3.3V, THD+N=-40dB
Output Noise Level: 11  Vrms (Ri=20k, Rf=30k)
Line-Out level:
2.0Vrms @ 5k, AVDD=PVDD=5.0V
2.0Vrms @ 5k, AVDD=PVDD=3.3V
Regulator built-in
THD+N:
-60 dB @ 16, 50mW, AVDD=PVDD=5.0V
-60 dB @ 16, 20mW, AVDD=PVDD=3.3V
-90 dB @ 5k, 2Vrms, AVDD=PVDD=5.0V
-90 dB @ 5k, 2Vrms, AVDD=PVDD=3.3V
Low Power Shutdown Mode
0.1A (typ)
Adjustable Gain Range:
-16 dB ~ 16dB
Pop noise free at power-ON/OFF
Power Supply: 2.6V ~ 3.6V or 4.5V ~ 5.5V
Ta: -40 ~ 85°C
Package: 12pin USON (2.2 x 2.9mm, 0.5mm pitch)
Evaluation Board: AKD4201
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