AK4201

CONFIDENTIAL [AK4201] = Preliminary = AK4201 Stereo Cap-less HP-Amp GENERAL DESCRIPTION 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. FEATURE † Stereo Cap-less Amplifier (No DC-blocking capacitors required) † High PSRR (100dB at 217Hz) † Output Power: 65 mW x 2ch @ 16Ω, AVDD=PVDD=5.0V, THD+N=-40dB 30 mW x 2ch @ 16Ω, AVDD=PVDD=3.3V, THD+N=-40dB † Output Noise Level: 11µVrms (Ri=20kΩ, Rf=30kΩ) † Line-Out level: 2.0Vrms @ 5kΩ, AVDD=PVDD=5.0V 2.0Vrms @ 5kΩ, AVDD=PVDD=3.3V † Regulator built-in † THD+N: -60 dB @ 16Ω, 50mW, AVDD=PVDD=5.0V -60 dB @ 16Ω, 20mW, AVDD=PVDD=3.3V -90 dB @ 5kΩ, 2Vrms, AVDD=PVDD=5.0V -90 dB @ 5kΩ, 2Vrms, AVDD=PVDD=3.3V † Low Power Shutdown Mode 0.1µA (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) www.DataSheet4U.com Rev 0.2 -1- 2008/07 CONFIDENTIAL [AK4201] ■ Block Diagram Rf AVDD Regulator Ci www.DataSheet4U.com Ri LIN Amp LOUT VSS2 AK4201 Regulator ROUT Ci Ri RIN Amp PVDD Charge Pump PDN VSS1 CP CN PVEE Rf...