ASAHI KASEI
[AK4640]
MS0273-E-00
2004/03
-
1
-
GENERAL 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.
FEATURES
1. Resolution : 16bits
2. Recording Function
Mono Input
2 to 1 Selector (Internal and External MIC)
1
st
MIC Amplifier : +20dB or 0dB
2
nd
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=50/15
s, 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 / I
2
C Bus
10. Master/Slave mode
16-Bit
CODEC with MIC/HP/SPK-AMP
AK4640
ASAHI KASEI
[AK4640]
MS0273-E-00
2004/03
-
2
-
11. Audio Interface Format : MSB First, 2's compliment
ADC : I
2
S, 16bit MSB justified
DAC : I
2
S, 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
Block Diagram
ALC1
(IPGA)
PMMIC
ATT
AVDD
AVSS
MICOUT
AIN
LRCK
BICK
SDTO
SDTI
PDN
DSP
and
uP
DVDD
DVSS
HVDD
HVSS
VCOM
MUTET
MIN
MOUT2
MOUT-
AUXIN+
MIX
HPL
PMHPL
HP-AMP
HPR
PMHPR
HP-AMP
Control
Register
Interface
Audio
PMSPK
SPK-
AMP
SPP
SPN
I2C
CSN/CAD1
CCLK/SCL
CDTI/SDA
CDTO
Volume
PMMO
MOUT
CAD0
AUXIN-
MOUT+
ATT
BEEPL
PLL
XTI/MCKI
XTO
MCKO
VCOC
PMPLL
PVDD
PVSS
MIX
MIX
MIX
MIX
PMAUX
MPE
MIC Power
Supply
EXT
INT
MIC-AMP
0dB or 20dB
MPI
MIC Power
Supply
M/S
PMBPS
HPF
ADC
PMADC
PMDAC
DATT
SMUTE
DAC
BEEPR
MIX
ATT
ALC2
BEEPM
PMBPM
PMHPL or PMHPR or PMSPK
Figure 1. Block Diagram
ASAHI KASEI
[AK4640]
MS0273-E-00
2004/03
-
5
-
Comparison with AK4534, AK4538
1. Function
Function AK4534
AK4538
AK4640
SPK-Amp Output Power at DAC
path
150mW 150mW 300mW
DAC Digital Filter
Stopband Attenuation
43dB 43dB 59dB
AUX Input
Not Available
Available
Available
MOUT Gain Select
Not Available
Available
Available
Path from IPGA to Analog Output
Not Available
Available
Available
HP-Amp Mono mode
Not Available
Available
Available
Stereo Line Out
Not Available
Available
Not Available
MIC Detect
Not Available
Available
Not Available
HP-Amp Power Supply Current
(typ)
6.5mA 6.5mA 4mA
SPK-Amp Power Supply Current
(typ)
9mA 9mA 7mA
Package 52pin
QFN
(7.2mm x 7.2mm)
52pin QFN
(7.2mm x 7.2mm)
52pin QFN
(7.2mm x 7.2mm),
57pin BGA
(5mm x 5mm)
2. Pin
Pin# AK4534
AK4538
AK4640VN
2 TST1
MDT
NC
42 TST2
ROUT
NC
43 TST3
LOUT
NC
46 TST4
AUXIN
- AUXIN-
47 TST5
AUXIN+
AUXIN+
3. Register
Addr Data AK4534
AK4538
AK4640
00H D2 0
PMAUX PMAUX
D4
0
PMLO 0
02H D4 0
MICM
MICM
D7
0
MOGN MOGN
03H D4 0
MICL
MICL
D5
0
AUXL AUXL
D6
0
PSLO 0
05H D2 0
HPM
HPM
D3
HPLM HPLM 0
D4
HPRM HPRM 0
07H D7 0
AUXAD AUXAD
0EH D3-0 0
GN3-0
GN3-0
D6-4
0
ATTS2-0
ATTS2-0
D7
0
ATTM ATTM
0FH D0 -
DTMIC
-
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