ASAHI KASEI
[AK4632]
16-Bit
∆Σ
Mono CODEC with ALC & MIC/SPK/Video-AMP
GENERAL DESCRIPTION
The AK4632 is a 16-bit mono CODEC with Microphone-Amplifier, Speaker-Amplifier and Video-
Amplifier. Input circuits include a Microphone-Amplifier and an ALC (Automatic Level Control) circuit.
Output circuits include a Speaker-Amplifier and Mono Line Output. Video circuits include a LPF and
Video-Amplifier. The AK4632 suits a moving picture of Digital Still Camera and etc. This
speaker-Amplifier supports a Piezo Speaker. The AK4632 is housed in a space-saving 32-pin QFN
package.
FEATURE
16-Bit Delta-Sigma Mono CODEC
Recording Function
•
1ch Mono Input
•
1
st
MIC Amplifier: 0dB, 20dB, 26dB or 32dB
•
2
nd
Amplifier with ALC: -8dB
∼
+27.5dB, 0.5dB Step
•
ADC Performance: S/(N+D): 80dB, DR, S/N: 85dB
Playback Function
•
Digital Volume: +12dB
∼
-115dB, 0.5dB Step, Mute
•
Mono Line Output Performance: S/(N+D): 85dB, S/N: 93dB
•
Mono Speaker-Amp
- Speaker-Amp Performance: S/(N+D): 60dB, S/N: 90dB (150mW@ 8Ω)
- BTL Output
- ALC (Automatic Level Control) Circuit
- Output Power: 400mW @ 8Ω, SVDD=3.3V
3.0Vrms@SVDD=5V
•
Beep Input
Power Management
Video Function
•
A Composite Video Input
•
Gain Control (-1.0dB
∼
+10.5dB, 0.5dB Step)
•
Low Pass Filter
•
A Video-Amp for Composite Video Signal(+6dB)
•
DC Direct Output or Sag Compensation Output
Flexible PLL Mode:
•
Frequencies:
11.2896MHz, 12MHz, 12.288MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)
1fs (FCK pin)
16fs, 32fs or 64fs (BICK pin)
EXT Mode:
•
Frequencies: 256fs, 512fs or 1024fs (MCKI pin)
Sampling Rate:
•
PLL Slave Mode (FCK pin) : 7.35kHz
~
26kHz
•
PLL Slave Mode (BICK pin) : 7.35kHz
~
48kHz
•
PLL Slave Mode (MCKI pin):
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
•
PLL Master Mode:
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
AK4632
1.
2.
3.
4.
5.
6.
7.
8.
MS0396-E-00
-1-
2005/06
ASAHI KASEI
[AK4632]
•
EXT Slave Mode:
7.35kHz
~
48kHz (256fs), 7.35kHz
~
26kHz (512fs), 7.35kHz
~
13kHz (1024fs)
9. Output Master Clock Frequency: 256fs
10. Serial
µP
Interface: 3-wire
11. Master / Slave Mode
12. Audio Interface Format: MSB First, 2’s compliment
•
ADC: DSP Mode, 16bit MSB justified, I
2
S
•
DAC: DSP Mode, 16bit MSB justified, 16bit LSB justified, I
2
S
13. Ta = -10
∼
70°C
14. Power Supply
•
CODEC: 2.6
∼
3.6V (typ. 3.3V)
•
Speaker-Amp: 2.6
∼
5.25V (typ. 3.3V/5.0V)
•
Video-Amp: 2.8
∼
5.25V (typ. 3.3V/5.0V)
15. Power Supply Current: 23.5 mA (All Power ON)
16. Package: 32pin QFN
17. Register Compatible with AK4631
Block Diagram
VCOM
MICOUT
MPI
MIC
MIC-AMP
0dB or 20dB
or 26dB or 32dB
PMMIC
MIC Power
Supply
ALC1
(IPGA)
PMADC
AVSS AVDD
AIN
DVDD
DVSS
PDN
ADC
HPF
PMAO
ALC1A
DACA
PMDAC
Audio
Interface
DVOL
FCK
BICK
AOUT
BEEPA
DACM
ALC1M
DAC
SDTO
SDTI
SVDD
SVSS
PMSPK
DSP
and
uP
SPP
SPK-
AMP
SPN
BEEP
PMBP
MIX
ALC2
Control
Register
CSN
CCLK
CDTI
PMV
PMPLL
MCKO
VOUT
+6dB
GCA
-1dB ~ +10.5dB
Step 0.5dB
LPF
CLAMP
PLL
MCKI
VSAG
VIN
VVDD
MIN
MOUT
VCOC
Figure 1. AK4632 Block Diagram
MS0396-E-00
-2-
2005/06
ASAHI KASEI
[AK4632]
Ordering Guide
AK4632VN
AKD4632
−10 ∼
+70°C
32pin QFN (0.5mm pitch)
Evaluation board for AK4632
Pin Layout
MCKO
SVDD
18
24
23
22
21
20
MOUT
AOUT
BEEP
AIN
MICOUT
MIC
MPI
VCOM
19
17
DVSS
SVSS
MCKI
SPN
SPP
MIN
25
26
27
28
29
30
31
32
7
1
2
3
4
5
6
8
16
15
14
DVDD
BICK
FCK
SDTO
SDTI
CDTI
CCLK
CSN
AK4632VN
Top View
13
12
11
10
9
VCOC
AVDD
VVDD
VSAG
VOUT
AVSS
Compare with AK4632
Function
Video Function
Package
AK4631
No
28pin QFN (5.2mm x 5.2mm)
AK4632
Yes
32pin QFN (5.0mm x 5.0mm)
The audio function of the AK4632 is compatible with that of the AK4631. Since the register map of audio
function is the same as the AK4631’s, the software of the audio function can run on the ak4632 without any
change.
MS0396-E-00
-3-
PDN
VIN
2005/06
ASAHI KASEI
[AK4632]
PIN/FUNCTION
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Pin Name
VCOC
AVDD
AVSS
VVDD
VIN
VOUT
VSAG
PDN
CSN
CCLK
CDTI
SDTI
SDTO
FCK
BICK
DVDD
DVSS
MCKI
MCKO
SPN
SPP
SVDD
SVSS
MIN
MOUT
AOUT
BEEP
AIN
MICOUT
MIC
MPI
VCOM
I/O
O
-
-
-
I
O
I
I
I
I
I
I
O
I/O
I/O
-
-
I
O
O
O
-
-
I
O
O
I
I
O
I
O
O
Function
Output Pin for Loop Filter of PLL Circuit
This pin should be connected to AVSS with one resistor and capacitor in series.
Analog Power Supply Pin
Analog Ground Pin
Video Block Power Supply Pin.
Composite Video Signal Input Pin
Composite Video Signal Driver Pin
Composite Video Signal Output Feedback Input Pin
Power-Down Mode Pin
“H”:
Power up,
“L”:
Power down reset and initialize the control register.
Chip Select Pin
Control Data Clock Pin
Control Data Input Pin
Audio Serial Data Input Pin
Audio Serial Data Output Pin
Frame Clock Pin
Audio Serial Data Clock Pin
Digital Power Supply Pin
Digital Ground Pin
External Master Clock Input Pin (Internal Pull Down 25kΩ@PDN pin =“L”)
Master Clock Output Pin
Speaker Amp Negative Output Pin
Speaker Amp Positive Output Pin
Speaker Amp Power Supply Pin
Speaker Amp Ground Pin
ALC2 Input Pin
Mono Analog Output Pin
Mono Line Output Pin
Beep Signal Input Pin
IPGA (ALC1) Input Pin
Microphone Analog Output Pin
Microphone Input Pin (Mono Input)
MIC Power Supply Pin for Microphone
Common Voltage Output Pin. Common Voltage = 0.45 x AVDD
Bias voltage of ADC inputs and DAC outputs.
Note : All input pins except analog input pins (MIC, AIN, MIN, BEEP and VIN pins) should not be left floating.
Note : The exposed pad on the bottom surface of the package must be open.
MS0396-E-00
-4-
2005/06
ASAHI KASEI
[AK4632]
Handling of Unused Pin
The unused I/O pins should be processed appropriately as below.
Classification
Pin Name
Analog Input
Analog Output
Digital Input
Digital Output
MIC, AIN, BEEP, MIN, VSAG
MICOUT, MPI, AOUT, MOUT, SPP, SPN, VOUT
MCKI, SDTI, FCK(when M/S bit =
“0”),
BICK(when M/S bit =
“0”)
MCKO, SDTO, FCK(when M/S bit =
“1”),
BICK(when M/S bit =
“1”)
Setting
These pins should be open and each path
should be switched off.
These pins should be open.
These pins should be connected to DVSS.
These pins should be open.
ABSOLUTE MAXIMUM RATINGS
(AVSS, DVSS, SVSS=0V; Note 1)
Parameter
Power Supplies:
Analog
Digital
Speaker-Amp
Video
|AVSS – DVSS| (Note 2)
|AVSS – SVSS|
(Note 2)
Input Current, Any Pin Except Supplies
Analog Input Voltage(Audio)
(Note 3)
Analog Input Voltage(Video)
(Note 4)
Digital Input Voltage
Ambient Temperature (powered applied)
Storage Temperature
Maximum Power Dissipation (Note 5)
Symbol
AVDD
DVDD
SVDD
VVDD
∆GND1
∆GND2
IIN
VINA
VINV
VIND
Ta
Tstg
Pd
min
−0.3
−0.3
−0.3
−0.3
-
-
-
−0.3
−0.3
−0.3
−10
−65
-
max
6.0
6.0
6.0
6.0
0.3
0.3
±10
AVDD+0.3
VVDD+0.3
DVDD+0.3
70
150
700
Units
V
V
V
V
V
V
mA
V
V
V
°C
°C
mW
Note 1. All voltages with respect to ground.
Note 2. AVSS, DVSS and SVSS must be connected to the same analog ground plane.
Note 3. MIC, AIN, BEEP, MIN pins
Note 4. VIN pin
Note 5. In case that PCB wiring density is 100%. This power is the AK4632 internal dissipation that does not include
power of externally connected speaker.
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
MS0396-E-00
-5-
2005/06
京公网安备 11010802033920号
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