AK4640

Features:

1. Resolution : 16bits
2. Recording Function
    • Mono Input
    • 2 to 1 Selector (Internal and External MIC)
    • 1st MIC Amplifier : +20dB or 0dB
    • 2nd Amplifier with ALC : +27.5dB ∼ −8dB, 0.5dB Step
    • ADC Performance : S/(N+D) : 79dB, DR, S/N : 83dB
3. Playback Function
    • Digital De-emphasis Filter (tc=50/15s, fs=32kHz, 44.1kHz, 48kHz)
    • Digital Volume (0dB ∼ −127dB, 0.5dB Step, Mute)
    • Headphone-Amp
        - S/(N+D) : 70dB, S/N : 90dB
        - Output Power : 15mW@16 (HVDD=3.3V)
        -  Click Noise Free at Power ON/OFF
    • Mono Speaker-Amp with ALC
       - S/(N+D) : 64dB@150mW, S/N : 90dB
       - BTL Output
       - ALC circuit
       - Output Power : 300mW@8, THD+N=10% (HVDD=3.3V)
    • Mono and Stereo Beep Inputs
4. Phone I/F
    • Full-differential AUX Input
    • Full-differential Mono Output
5. Power Management
6. Master Clock
   (1) PLL Mode
   • Frequencies : 11.2896MHz, 12MHz and 12.288MHz
   • Input Level : CMOS
   (2) External Clock Mode
   • Frequencies : 1.792MHz ∼ 12.288MHz
7. Output Master Clock Frequencies : 32fs/64fs/128fs/256fs
8. Sampling Rate
    (1) PLL Mode
    • 8kHz, 11.025kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
    (2) External Clock Mode
    • 8kHz ∼ 48kHz
9. Control mode: 4-wire Serial / I²C Bus
10. Master/Slave mode
11. Audio Interface Format : MSB First, 2's compliment
    • ADC : I²S, 16bit MSB justified
    • DAC : I²S, 16bit MSB justified, 16bit LSB justified
12. Ta = −10 ∼ 70°C
13. Power Supply: 2.4V ∼ 3.6V (typ. 3.3V)
14. Power Supply Current
     • AVDD+DVDD : 19mA
     • PVDD : 1.2mA
     • HVDD (HP-AMP=ON, SPK-AMP=OFF) : 4mA
     • HVDD (HP-AMP=OFF, SPK-AMP=ON) : 7mA
15. Package : 57pin BGA (5mm x 5mm, 0.5mm pitch)
                      52pin QFN (Pin Compatible with AK4534/8VN)
16. Register Compatible with AK4534/8


Pinout




Specifications

(AVSS, DVSS, PVSS, HVSS=0V; Note 1)

Parameter		Symbol	min	max	Units
Power Supplies:	Analog Digital PLL PVDD Headphone-Amp / Speaker-Amp |AVSS PVSS| (Note 2) |AVSS DVSS| (Note 2) |AVSS HVSS| (Note 2)	AVDD DVDD PVDD HVDD GND1 GND2 GND3	-0.3 -0.3 -0.3 -0.3 - - -	4.6 4.6 4.6 4.6 0.3 0.3 0.3	V V V V V V V
Input Current, Any Pin Except Supplies		IIN	-	±10	mA
Analog Input Voltage		VINA	-0.3	AVDD+0.3	V
Digital Input Voltage		VIND	-0.3	DVDD+0.3	V
Ambient Temperature (Powered applied)		Ta	-10	70	°C
Storage Temperature		Tstg	-65	150	°C

Note 1. All voltages with respect to ground.
Note 2. AVSS, DVSS, PVSS and HVSS must be connected to the same analog ground plane.


Description

The AK4640 targeted at PDA and other low-power, small size applications. It features a 16bit stereo CODEC with a built-in Microphone-Amplifier, Headphone-Amplifier and Speaker-Amplifier. Input circuits include a Microphone-Amplifier and an ALC (Auto Level Control) circuit. The AK4640 is available in a smaller 57pin BGA in addition to a 52pin QFN that has compatibility with the AK4534/8, utilizing less board space than competitive offerings.