ASAHI KASEI
[AK5354]
MS0054-E-01
2001/01
- 1 -
FEATURES
The AK5354 is a low voltage 20bit A/D converter for digital audio system. The AK5354 also includes
Analog input PGA, therefore is suitable for microphone application and etc. As digital power supply of the
AK5354 corresponds to 1.8V, the interface with microprocessor can operate at low voltage. Analog
signal input of the AK5354 is single-ended, therefore, any external filters are not required. As the
package is 16pin TSSOP, the AK5354 is a suitable for minimizing system.
FEATURES
1. Resolution : 20bits
2. Recording Functions
2-Stereo Inputs Selector
Analog Input PGA
Monaural Mixing
Digital HPF for DC-offset cancellation (fc=3.4Hz@fs=44.1kHz)
3. ADC Characteristics
Input Level : 1.5Vpp@VA=2.5V (= 0.6 x VA)
S/(N+D) : 84dB
DR, S/N : 89dB
4. 3-wire Serial Control I/F
5. Master Clock : 256fs/384fs
6. Audio Data Format : MSB First, 2's compliment
20bit MSB justified or I
2
S
8. Power Supply
VA : 2.1
3.3V (typ. 2.5V)
VD : 1.8
3.3V (typ. 2.5V)
9. Power Supply Current
IPGA + ADC : 7mA
10. Ta = -40
85
C
11. Package : 16pin TSSOP
LIN1
VCOM
VA
VSS
CSN
CCLK
CDTI
MCLK
SDTO
BCLK
LRCK
VD
ADC
HPF
Audio I/F
Controller
Control Register I/F
Clock Divider
PDN
LIN2
RIN1
RIN2
IPGA
Low Power 20bit
ADC with PGA
AK5354
ASAHI KASEI
[AK5354]
MS0054-E-01
2001/01
- 2 -
n
Ordering Guide
AK5354VT
-40
+85
C
16pin TSSOP (0.65mm pitch)
AKD5354
Evaluation Board for AK5354
n
Pin Layout
Top View
8
7
6
5
4
3
2
1
9
10
11
12
13
14
15
16
LIN2
RIN2
VA
VD
CCLK
CDTI
SDTO
BCLK
MCLK
LIN1
RIN1
VCOM
VSS
LRCK
CSN
PDN
PIN/FUNCTION
No.
Pin Name
I/O
Function
1
LIN1
I
Lch #1 Input Pin
2
RIN1
I
Rch #1 Input Pin
3
LIN2
I
Lch #2 Input Pin
4
RIN2
I
Rch #2 Input Pin
5
VCOM
O
ADC Common Voltage Output Pin
6
VSS
-
Ground Pin
7
VA
-
Analog Power Supply Pin, +2.5V
8
VD
-
Digital Power Supply Pin, +2.5V
9
SDTO
O
Audio Serial Data Output Pin
10
BCLK
I
Audio Serial Data Clock Pin
11
MCLK
I
Master Clock Input Pin
12
LRCK
I
Input/Output Channel Clock Pin
13
CDTI
I
Control Data Input Pin
14
CCLK
I
Control Clock Input Pin
15
CSN
I
Chip Select Pin
16
PDN
I
Reset & Power Down Pin
"L" : Reset & Power down
"H" : Normal operation
Note: All digital input pins should not be left floating.
ASAHI KASEI
[AK5354]
MS0054-E-01
2001/01
- 3 -
ABSOLUTE MAXIMUM RATINGS
(VSS=0V; Note 1)
Parameter
Symbol
min
max
Units
Power Supply
Analog
Digital
VA
VD
-0.3
-0.3
4.6
4.6
V
V
Input Current (Any Pin Except Supplies)
IIN
-
10
mA
Analog Input Voltage (LIN2-1, RIN2-1 pins)
VINA
-0.3
VA+0.3
V
Digital Input Voltage
VIND
-0.3
VD+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.
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
(VSS=0V; Note 1)
Parameter
Symbol
min
typ
max
Units
Power Supply
Analog (VA pin)
Digital (VD pin)
VA
VD
2.1
1.8
2.5
2.5
3.3
VA
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.
ASAHI KASEI
[AK5354]
MS0054-E-01
2001/01
- 4 -
ANALOG CHARACTERISTICS
(Ta=25
C; VA, VD=2.5V; fs=44.1kHz; Signal Frequency=1kHz; Measurement frequency=10Hz
20kHz;
unless otherwise specified)
Parameter
min
typ
max
Units
Resolution
20
bits
Input PGA Characteristics (IPGA):
Input Voltage (LIN1, LIN2, RIN1, RIN2) (Note 2)
1.35
1.5
1.65
Vpp
Input Impedance
6.3
9
15
k
Step Width
+28dB
-8dB
-8dB
-16dB
-16dB
-32dB
-32dB
-40dB
-40dB
-52dB
0.1
0.1
0.1
-
-
0.5
1
2
2
4
1
2
4
-
-
dB
dB
dB
dB
dB
ADC Analog Input Characteristics: (Note 3)
S/(N+D) (-0.5dBFS Input)
74
84
dB
D-Range (EIAJ)
82
89
dB
S/N (EIAJ)
82
89
dB
Interchannel Isolation
90
100
dB
Interchannel Gain Mismatch
0.2
0.5
dB
Power Supplies
Power Supply Current: VA+VD
Normal Operation (PDN="H")
IPGA+AD (PM0=1, PM1=1)
Power Down (PDN="L") (Note 4)
7
10
10
100
mA
A
Note: 2. Analog input voltage (full-scale voltage: IPGA = 0dB) scale with VREF. (IPGA = ADC = 0.6 x VREF)
Note: 3. ADC is input from LIN1/RIN1 or LIN2/RIN2 and it measures included in IPGA. The value of IPGA is set 0dB.
Internal HPF cancels the offset of IPGA and ADC.
Note: 4. In case of power-down mode, all digital input pins including clocks pins (MCLK, BCLK and LRCK) are held
VD or VSS. PDN pin is held VSS.
ASAHI KASEI
[AK5354]
MS0054-E-01
2001/01
- 5 -
FILTER CHARACTERISTICS
(Ta=25
C; VA=2.1
3.3V, VD=1.8
3.3; fs=44.1kHz)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (Decimation LPF):
Passband (Note 5)
0.1dB
-1.0dB
-3.0dB
PB
0
20.0
21.1
17.4
kHz
kHz
kHz
Stopband (Note 5)
SB
27.0
kHz
Passband Ripple
PR
0.1
dB
Stopband Attenuation
SA
65
dB
Group Delay (Note 6)
GD
17.0
1/fs
Group Delay Distortion
GD
0
s
ADC Digital Filter (HPF):
Frequency Response (Note 5)
-3dB
-0.5dB
-0.1dB
FR
3.4
10
22
Hz
Hz
Hz
Note:5. The passband and stopband frequencies scale with fs (sampling frequency).
For examples, PB=0.454 x fs(@ADC: -1.0dB), PB=0.454 x fs(@DAC: -0.1dB).
Note: 6. The calculating delay time which occurred by digital filtering. This time is from the input of analog signal to
setting the 20bit data of both channels to the output register for ADC and include group delay of HPF.
DC CHARACTERISTICS
(Ta=25
C; VA=2.1
3.3V, VD=1.8
3.3V)
Parameter
Symbol
min
Typ
max
Units
High-Level Input Voltage
Low-Level Input Voltage
VIH
VIL
75
%
VD
-
-
-
-
25
%
VD
V
V
High-Level Output Voltage (Iout=-80
A)
Low-Level Output Voltage (Iout=80
A)
VOH
VOL
VD-0.4
-
-
-
0.4
V
V
Input Leakage Current
Iin
-
-
10
A
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