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ASAHI KASEI
[AK4640]
AK4640
16-Bit ∆Σ CODEC with MIC/HP/SPK-AMP
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)
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=50/15µs, 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
MS0273-E-00
-1-
2004/03

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ASAHI KASEI
[AK4640]
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
„ Block Diagram
MPE
MPI
INT
EXT
MOUT+
MOUT-
MICOUT
MIC Power
Supply
MIC Power
Supply
PMMIC
AIN
ALC1
(IPGA)
MIC-AMP
0dB or 20dB
PMMO
ATT
ATT
PMHPL or PMHPR or PMSPK
ATT
HVDD
HVSS
HPL
PMHPL
HP-AMP MIX
MIX
M/S AVSS AVDD
PMADC
ADC HPF
Audio
Interface
PMDAC
DATT
DAC SMUTE
Control
Register
HPR
MUTET
SPP
SPN
VCOM
PMHPR
HP-AMP MIX
MIX
SPK-
AMP
PMSPK
ALC2
MIX
PMBPS
PMBPM
PMPLL
PLL
Volume
MIX
MOUT
PMAUX
DVSS DVDD
BEEPL
BEEPR BEEPM MIN MOUT2 AUXIN+ AUXIN-
Figure 1. Block Diagram
CAD0
PDN
LRCK
BICK
SDTO
SDTI
I2C
CSN/CAD1
CCLK/SCL
CDTI/SDA
CDTO
XTO
XTI/MCKI
PVDD
PVSS
MCKO
VCOC
DSP
and
uP
MS0273-E-00
-2-
2004/03

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ASAHI KASEI
„ Ordering Guide
AK4640VG
AK4640VN
AKD4640
10 +70°C
57pin BGA (0.5mm pitch)
10 +70°C
52pin QFN (0.4mm pitch)
Evaluation board for AK4640
„ Pin Layout (AK4640VG)
[AK4640]
9
8
7
6 AK4640
5 Top View
4
3
2
1
A BC D EFG H J
9
NC
HPR
HVSS
HVDD
SPN
SPP
M/S XTI/MCKI NC
8
HPL
MUTET
HVSS
HVDD
SPN
SPP
XTO
DVDD
DVSS
7 MIN NC
NC MCKO
6 MOUT2 MOUT
BICK
LRCK
5 MOUT+ AUXIN
Top View
SDTI
SDTO
4 BEEPM AUXIN+
CDTO
I2C
3
BEEPL BEEPR
NC
CCLK/SCL CDTI/SDA
2
MICOUT
AIN
MPI
VCOM
AVDD
AVDD
PVSS CSN/CAD1 PDN
1
NC
EXT MPE
INT
AVSS
PVDD
VCOC
CAD0
NC
A BCDE FGH J
MS0273-E-00
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2004/03

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ASAHI KASEI
„ Pin Layout (AK4640VN)
[AK4640]
MIN
MOUT2
NC
NC
MOUT
MOUT+
AUXIN
AUXIN+
BEEPM
BEEPR
BEEPL
AIN
NC
40
41
42
43
44
45
46
47
48
49
50
51
52
AK4640
Top View
26 NC
25 MCKO
24 BICK
23 LRCK
22 SDTO
21 SDTI
20 I2C
19 CDTO
18 CDTI/SDA
17 CCLK/SCL
16 CSN/CAD1
15 PDN
14 CAD0
MS0273-E-00
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2004/03

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ASAHI KASEI
„ Comparison with AK4534, AK4538
1. Function
Function
SPK-Amp Output Power at DAC
path
DAC Digital Filter
Stopband Attenuation
AUX Input
MOUT Gain Select
Path from IPGA to Analog Output
HP-Amp Mono mode
Stereo Line Out
MIC Detect
HP-Amp Power Supply Current
(typ)
SPK-Amp Power Supply Current
(typ)
Package
AK4534
150mW
43dB
Not Available
Not Available
Not Available
Not Available
Not Available
Not Available
6.5mA
9mA
52pin QFN
(7.2mm x 7.2mm)
2. Pin
Pin#
2
42
43
46
47
3. Register
Addr
00H
02H
03H
05H
07H
0EH
0FH
Data
D2
D4
D4
D7
D4
D5
D6
D2
D3
D4
D7
D3-0
D6-4
D7
D0
AK4534
TST1
TST2
TST3
TST4
TST5
AK4534
0
0
0
0
0
0
0
0
HPLM
HPRM
0
0
0
0
-
AK4538
150mW
43dB
Available
Available
Available
Available
Available
Available
6.5mA
9mA
52pin QFN
(7.2mm x 7.2mm)
AK4538
MDT
ROUT
LOUT
AUXIN
AUXIN+
AK4538
PMAUX
PMLO
MICM
MOGN
MICL
AUXL
PSLO
HPM
HPLM
HPRM
AUXAD
GN3-0
ATTS2-0
ATTM
DTMIC
[AK4640]
AK4640
300mW
59dB
Available
Available
Available
Available
Not Available
Not Available
4mA
7mA
52pin QFN
(7.2mm x 7.2mm),
57pin BGA
(5mm x 5mm)
AK4640VN
NC
NC
NC
AUXIN
AUXIN+
AK4640
PMAUX
0
MICM
MOGN
MICL
AUXL
0
HPM
0
0
AUXAD
GN3-0
ATTS2-0
ATTM
-
MS0273-E-00
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2004/03