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AK4201 Dataheets PDF



Part Number AK4201
Manufacturers Asahi Kasei Microsystems
Logo Asahi Kasei Microsystems
Description Stereo Cap-less HP-Amp
Datasheet AK4201 DatasheetAK4201 Datasheet (PDF)

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,.

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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 Figure 1. AK4201 Block Diagram Rev 0.2 -2- 2008/07 CONFIDENTIAL [AK4201] ■ Ordering Guide AK4201EU AKD4201 −40 ∼ +85°C 12pin USON (2.2mm x 2.9mm, 0.5mm pitch) Evaluation board for AK4201 ■ Pin Layout LIN 1 12 RIN LOUT www.DataSheet4U.com 2 11 ROUT AVDD 3 Top View 10 PVEE VSS1 4 9 VSS2 PVDD 5 8 PDN CN 6 7 CP Rev 0.2 -3- 2008/07 CONFIDENTIAL [AK4201] PIN/FUNCTION No. 1 2 3 4 5 6 7 8 Pin Name LIN LOUT AVDD VSS1 PVDD CN CP PDN I/O I O O O I Function L-channel analog input L-channel analog output Headphone positive power supply pin, 2.6V ~ 5.5V Power ground Charge-pump positive power supply pin, 2.6V ~ 5.5V Negative charge-pump capacitor terminal pin Positive charge-pump capacitor terminal pin Power-down mode pin “H”: Power-up, “L”: Power-down Signal ground; connect to VSS1 Charge-pump circuit negative voltage output pin R-channel analog output R-channel analog input 9 VSS2 10 PVEE O 11 ROUT O RIN I www.DataSheet4U.com 12 Note. PDN pin should not be floated. ■ Handling of Unused Pin The unused I/O pins should be processed appropriately as below. Classification Analog Pin Name LIN, RIN, LOUT, ROUT Setting Connect Output pin to Input pin when one channel is used and the other is not used. (Example) Connect the LOUT pin to the LIN pin if Lch is not used. Rev 0.2 -4- 2008/07 CONFIDENTIAL [AK4201] ABSOLUTE MAXIMUM RATING (VSS1=VSS2 =0V (Note 1)) Parameter Symbol min Power Supplies: Analog AVDD −0.3 (Note 2) Charge Pump PVDD −0.3 Input Curren.


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