ASAHI KASEI
[AK5356]
MS0171-E-00
2002/08
- 1 -
GENERAL DESCRIPTION
The AK5356 is a low voltage 20bit A/D converter for digital audio system. The AK5356 also includes
microphone amplifier and analog input PGA, making it suitable for microphone applications or low-input
signal levels. As digital power supply of the AK5356 corresponds to 1.8V, the interface with
microprocessor can operate at low voltage. The AK5356 is housed in a space-saving 28-pin QFN
package.
FEATURES
1. MIC Block
MIC Power
Pre-Amplifier (+13dB / +18dB / +28dB / +33dB)
2. 20bit 2ch ADC
2-Input Stereo Selector
Analog Input PGA: +28dB
- 52dB, Mute
S/(N+D): 84dB
DR, S/N: 89dB
Monaural Mixing
Digital HPF for DC-offset cancellation (fc=3.4Hz@fs=44.1kHz)
3. 3-wire Serial Control I/F
4. Master Clock: 256fs/384fs
5. Audio Data Format: MSB First, 2's compliment
16/20bit MSB justified or 16/20bit I
2
S compatible
6. Power Supply Voltage
AVDD: 2.0
3.3V
MVDD: 2.4
3.3V
DVDD: 1.8
3.3V
7. Power Supply Current
MIC Block: 3.4mA
IPGA+ADC: 6mA
8. Ta = - 40
85
C
9. Package: 28pin QFN
Low Power 20-Bit ADC with MIC-Amp & PGA
AK5356
ASAHI KASEI
[AK5356]
MS0171-E-00
2002/08
- 2 -
SDTO
MCLK
LRCK
BCLK
PRER
DVSS
DVDD
PDN
CSN CCLK CDTI
Audio I/F
Controller
Control Register I/F
PREL
MIC Power Supply
Power Management
ADC
MVDD
RIN
PMADC
Pre-Amp
LIN
PMMIC
MVSS
MRF
AVSS
AVDD
VCOM
MVCM
MICL
MPWR
MICR
Figure 1. AK5356 Block Diagram
ASAHI KASEI
[AK5356]
MS0171-E-00
2002/08
- 3 -
n
Ordering Guide
AK5356VN -40
+85
C 28pin QFN (0.5mm pitch)
AKD5356 Evaluation Board for AK5356
n
Pin Layout
Top View
8
7
6
5
4
3
2
1
28
27
26
25
24
23
22
9
10
11
12
13
14
16
17
18
19
20
21
AVDD
AVSS
SDTO
MRF
LIN
MP
WR
MVSS
MVDD
MICR
PREOR
MICL
PREOL
PRENL
PREL
PRER
PRENR
LRCK
CDTI
CCLK
CSN
PDN
RIN
VCOM
DVSS
DVDD
BCLK
MCLK
15
MVCM
ASAHI KASEI
[AK5356]
MS0171-E-00
2002/08
- 4 -
PIN/FUNCTION
No.
Pin Name
I/O
Function
1
RIN
I
Rch Line Input Pin
2
VCOM
O
ADC Common Voltage Output Pin
3
AVDD
-
Analog Power Supply Pin, +2.5V
4
AVSS
-
Analog Ground Pin
5
DVSS
-
Digital Ground Pin
6
DVDD
-
Digital Power Supply Pin, +2.5V
7
SDTO
O
Audio Serial Data Output Pin
8
BCLK
I
Audio Serial Data Clock Pin
9
MCLK
I
Master Clock Input Pin
10
LRCK
I
Input/Output Channel Clock Pin
11
CDTI
I
Control Data Input Pin
12
CCLK
I
Control Clock Input Pin
13
CSN
I
Chip Select Pin
14
PDN
I
Reset & Power Down Pin
"L": Reset & Power down, "H": Normal operation
15
MICL
I
Lch MIC Input Pin
16
PREOL
O
Lch Pre-Amp Output Pin
17
PRENL
I
Lch Pre-Amp Negative Input Pin
18
PREL
I
Lch Pre-Amp Positive Input Pin
19
PRER
I
Rch Pre-Amp Positive Input Pin
20
PRENR
I
Rch Pre-Amp Negative Input Pin
21
PREOR
O
Rch Pre-Amp Output Pin
22
MICR
I
Rch MIC Input Pin
23
MVDD
-
MIC Block Power Supply Pin, +2.7V
24
MVSS
-
MIC Block Ground Pin
25
MVCM
O
MIC Block Common Voltage Output Pin
26
MRF
O
MIC Power Supply Ripple Filter Pin
27
MPWR
O
MIC Power Supply Pin
28
LIN
I
Lch Line Input Pin
Note: All digital input pins should not be left floating.
ASAHI KASEI
[AK5356]
MS0171-E-00
2002/08
- 5 -
ABSOLUTE MAXIMUM RATINGS
(AVSS, DVSS, MVSS=0V; Note 1)
Parameter
Symbol
min
max
Units
Power Supply
Analog
MIC
Digital
| DVSS AVSS | (Note 2)
| MVSS AVSS | (Note 2)
AVDD
MVDD
DVDD
GND1
GND2
-0.3
-0.3
-0.3
-
-
4.6
4.6
4.6
0.3
0.3
V
V
V
V
V
Input Current (Any Pin Except Supplies)
IIN
-
10
mA
Analog Input Voltage (Note 3)
(Note 4)
VINA1
VINA2
-0.3
-0.3
AVDD+0.3
MVDD+0.3
V
V
Digital Input Voltage (Note 5)
VIND
-0.3
DVDD+0.3
V
Ambient Temperature (power applied)
Ta
-40
85
C
Storage Temperature
Tstg
-65
150
C
Note 1. All voltages with respect to ground.
Note 2. AVSS, DVSS and MVSS must be connected to the same analog ground plane.
Note 3. MICL, MICR, LIN and RIN pins
Note 4. PREL, PRER, PRENL and PRENR pins
Note 5. MCLK, BCLK, LRCK, CSN, CCLK, CDTI and PDN pins
WARNING: Operation at or beyond these limits may results in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(AVSS, DVSS, MVSS=0V; Note 1)
Parameter
Symbol
min
typ
max
Units
Power Supply
Analog
MIC
Digital
AVDD
MVDD
DVDD
2.0
2.4
1.8
2.5
2.7
2.5
3.3
3.3
AVDD
V
V
V
Note 1. All voltages with respect to ground
WARNING: AKM assumes no responsibility for the usage beyond the conditions in this data sheet.
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