AK4201 AKM | Alldatasheet
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CONFIDENTIAL [AK4201] Rev 0.2 2008/07 - 1 - 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) Stereo Cap-less HP-Amp AK4201= Preliminary =
Figure 1. AK4201 Block Diagram
CONFIDENTIAL [AK4201] Rev 0.2 2008/07 - 3 - ■ Ordering Guide AK4201EU −40 ∼ +85°C 12pin USON (2.2mm x 2.9mm, 0.5mm pitch) AKD4201 Evaluation board for AK4201 ■ Pin Layout
1 LIN
CONFIDENTIAL [AK4201] Rev 0.2 2008/07 - 4 - PIN/FUNCTION No. Pin Name I/O Function
1 LIN I L-channel analog input
2 LOUT O L-channel analog output
3 AVDD - Headphone positive power supply pin, 2.6V ~ 5.5V
4 VSS1 - Power ground
5 PVDD - Charge-pump positive power supply pin, 2.6V ~ 5.5V
6 CN O Negative charge-pump capacitor terminal pin
7 CP O Positive charge-pump capacitor terminal pin
8 PDN I Power-down mode pin
“H”: Power-up, “L”: Power-down
9 VSS2 - Signal ground; connect to VSS1
10 PVEE O Charge-pump circuit negative voltage output pin
11 ROUT O R-channel analog output
12 RIN I R-channel analog input
Note. PDN pin should not be floated. ■ Handling of Unused Pin The unused I/O pins should be processed appropriately as below. Classification Pin Name Setting Analog LIN, RIN, LOUT, ROUT 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.
CONFIDENTIAL [AK4201] Rev 0.2 2008/07 - 5 - ABSOLUTE MAXIMUM RATING (VSS1=VSS2 =0V (Note 1)) Parameter Symbol min max Units Power Supplies: Analog AVDD −0.3 6.0 V (Note 2) Charge Pump PVDD −0.3 6.0 V Input Current, Any Pin Except Supplies IIN - ±10 mA Input Voltage (Note 3) VIN −0.3 (AVDD + 0.3) or 6.0 V Ambient Temperature (powered applied) Ta −40 85 °C Storage Temperature Tstg −65 150 °C Maximum Power Dissipation (Note 4) Pd - TBD W WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. RECOMMEND OPERATING CONDITIONS (VSS1=VSS2 =0V (Note 1)) Parameter Symbol min typ max Units Analog Charge Pump AVDD, PVDD 4.5 2.6 5.0 3.3 5.5
3.6 V Power
Supplies (Note 5) Difference AVDD − PVDD -0.3 0 0.3 V Parameter Symbol min typ max Units External Input Resistance Ri 10 - 100 kΩ External Feedback Resistance Rf 10 - 100 kΩ Load Resistance (LOUT, ROUT pins) R L 16 - - Ω Capacitance (LOUT, ROUT pins) C L - - 300 pF Capacitance (LIN, RIN pins) Csum - - 20 pF Note 1. All voltages are respect to ground. Note 2. VSS1 and VSS2 must be connected to the same analog plane. Note 3. LIN, RIN, PDN pin The maximum value is low value either (AVDD+0.3) V or 6.0V. Note 4. 2ch Output Power (Po, when load is 16Ω) should be less TBD W. Note 5. The power up sequence among AVDD, PVDD is not critical. The PDN pin should be held to “L” when powered-up. The PDN pin should be set to “H” after all power supplies are powered-up. The PDN pin should be held to “L”, when powered-down. Operation by the power-supply voltage from 3.6 to 4.5V is prohibited. Note: AKEMD assumes no responsibility for the usage beyond the conditions in this datasheet.
CONFIDENTIAL [AK4201] Rev 0.2 2008/07 - 6 - ANALOG CHARACTERISTICS (AVDD=PVDD=5.0V) (AVDD=PVDD=5.0V; PDN=5.0V; Ta=25ºC; VSS1=VSS2=0V; Input Signal Frequency =1kHz; Measurement band width=10Hz ∼ 20kHz; Gain=+3.5dB (Ri=20kΩ, Rf=30kΩ); Headphone-Amp: RL =16Ω; Charge Pump Circuit External Capacitance: C1=C2= 1μF (Figure 3), unless otherwise specified) Parameter min typ max Units Output Power RL =16Ω, 0.68Vrms Input - 65 - mW THD+N 0.68Vrms Input; Po = 65mW @ RL =16Ω - −40 TBD dB 0.60Vrms Input; Po = 50mW @ RL =16Ω - −60 TBD dB 1.33Vrms Input; Vo = 2.0Vrms @ RL =5kΩ - −90 TBD dB S/N (Signal-to-Noise Ratio) RL =16Ω (A-weighted) (Note 6) TBD 102 - dB RL =5kΩ (A-weighted) (Note 7) TBD 108 - dB PSRR (Power Supply Rejection Ratio) (Note 8) 217Hz - 100 - dB 1kHz - 90 - dB Interchannel Isolation RL =16Ω 60 80 - dB RL =5kΩ - 80 - dB Output Offset Voltage - ±0.5 ±5.0 mV Start-up time (Note 9) - - 50 ms Power Supplies AVDD + PVDD (Normal Mode; No Output) - 4 TBD mA AVDD + PVDD (Power-Down Mode, PDN =0V) - 0.1 TBD uA Note 6. In case of 0.68Vrms Input (Po=65mW). Note 7. In case of 1.33Vrms Input (Vo=2Vrms). Note 8. PSR is applied to AVDD and PVDD with 500mVpp sine wave. Note 9. The time from PDN pin= “H” to when the AK4201 can output the data.
CONFIDENTIAL [AK4201] Rev 0.2 2008/07 - 7 - ANALOG CHARACTERISTICS (AVDD=PVDD=3.3V) (AVDD=PVDD=3.3V; PDN=3.3V; Ta=25ºC; VSS1=VSS2=0V; Input Signal Frequency =1kHz; Measurement band width=10Hz ∼ 20kHz; Gain=+3.5dB (Ri=20kΩ, Rf=30kΩ); Headphone-Amp: RL =16Ω; Charge Pump Circuit External Capacitance: C1=C2= 1μF (Figure 3), unless otherwise specified) Parameter min typ max Units Output Power RL =16Ω, 0.46Vrms Input - 30 - mW THD+N 0.46Vrms Input; Po = 30mW @ RL =16Ω - -40 TBD dB 0.27Vrms Input; Po = 10mW @ RL =16Ω -60 TBD dB 1.33Vrms Input; Vo = 2.0Vrms @ RL =5kΩ - -90 TBD dB S/N (Signal-to-Noise Ratio) RL =16Ω (A-weighted) (Note 10) 92 98 - dB RL =5kΩ (A-weighted) (Note 11) 100 106 - dB PSRR (Power Supply Rejection Ratio) (Note 12) 217Hz - 70 - dB 1kHz - 70 - dB Interchannel Isolation RL =16Ω 60 80 - dB RL =5kΩ - 80 - dB Output Offset Voltage - ±0.5 ±5.0 mV Start-up time (Note 13) - - 50 ms Power Supplies AVDD + PVDD (Normal Mode; No Output) - 4 TBD mA AVDD + PVDD (Power-Down Mode, PDN =0V) - 0.1 TBD μA Note 10. In case of 0.46Vrms Input (Po=30mW). Note 11. In case of 1.33Vrms Input (Vo=2Vrms). Note 12. PSR is applied to AVDD and PVDD with 100mVpp sine wave. Note 13. The time from PDN pin= “H” to when the AK4201 can output the data.
Note 14. Apply to the PDN pin. Figure 2. Power-down Timing
headphone amplifiers is generated from internal charge pump circuit. The external capacitors are showed in Figure 3. and piece to piece variations) are recommended for C1 and C2. Figure 3. Charge Pump Circuit External Capacitor
CONFIDENTIAL [AK4201] Rev 0.2 2008/07 - 11 - SYSTEM DESIGN Top View Power Supply 4.5∼5.5V, 2.6∼3.6V DSP or μP 10µ 0.1µ (+) (+) 0.1µ 0.22µ 0.22µ 20kΩ20kΩ 30kΩ Analog Input Analog Input Ci Ri Rf Ci Ri 10µ Power Supply 4.5∼5.5V, 2.6∼3.6V 30kΩ Rf Note: 1. The PDN pin should be held to “L” when powered-up. The PDN pin should be set to “H” after all power supplies are powered-up. When power-down the AK4201, the PDN pin should be held to “L”. Refer to “Power-Up/Down Sequence” to avoid pop noise when power-up/down the AK4201. 1) Power-Up The power should be ON when the PDN pin = “L”. The PDN pin should be set to “H” 150ns after all power supplies (AVDD, PVDD) are ON. 150ns “L” time or more is needed to reset the AK4201. 2) Power-Down The AK4201 should be powered-down when the PDN pin = “L”. 2. 1uF~2.2uF ceramic capacitors (±35% including temperature characteristics and piece-to-piece variations)should be connected to between the Cp and Cn pins, and the VSS1 and PVEE1 pins. 3. Both lines from the LIN pin and RIN pin to each Input resistance Ri and feedback resistance Rf should be short as possible. 4. A capacitor should be connected to the each LIN and RIN pin for AC coupling.
CONFIDENTIAL [AK4201] Rev 0.2 2008/07 - 12 - PACKAGE 12pin USON (2.2mm x 2.9mm, 0.5mm pitch) = Preliminary = 2.2 ± 0.05 2.9± 0.05 0.6MAX 2.9 ± 0.05 0.225 ± 0.05 0.5 0.25 ± 0.05 0.05 M 0.08 ± 0.05 0.175 ± 0.05 2.2 ± 0.05 1.35 ± 0.05 2.6 ± 0.05
CONFIDENTIAL [AK4201] Rev 0.2 2008/07 - 13 - MARKING 4201 XXXX XXXX: Date code (4 digit) IMPORTANT NOTICE z These products and their specifications are subject to change without notice. When you consider any use or application of these products , please make inquiries the sales office of Asahi Kasei EMD Corporation (AKEMD) or authorized distributors as to current status of the products. z AKEMD assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of any information contained herein. z Any export of these products, or devices or systems containi ng them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. z AKEMD products are neither intended nor authorized for use as critical componentsNote1) in any safety, life support, or other hazard related device or system Note2), and AKEMD assumes no responsibility fo r such use, except for the use approved with the express written consent by Representative Director of AKEMD. As used here: Note1) A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. Note2) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. z It is the responsibility of the buyer or distributor of AKEMD products, who distributes, disposes of, or otherwise places the product with a third party, to notify such third party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold AKEMD harmless from any and all claims arising from the use of said product in the absence of such notification.