ASAHI KASEI
[AK5385A]
MS0265-E-01
2003/11
- 1 -
GENERAL DESCRIPTION
The AK5385A is a 24bit, 192kHz sampling 2ch A/D converter for high-end audio system. The modulator
in the AK5385A uses the Enhanced Dual Bit architecture and the AK5385A realizes high accuracy and
low cost. The AK5385A performs 114dB dynamic range, so the device is suitable for AV-amp, AV
recorder and musical instruments. The AK5385A is available in 28pin VSOP and SOP package, utilizing
less board space.
FEATURES
p
Sampling Rate: 8kHz ~ 216kHz
p
Full Differential Inputs
p
S/(N+D): 103dB
p
DR: 114dB
p
S/N: 114dB
p
High Performance Linear Phase Digital Anti-Alias filter
Passband: 0~21.768kHz (@fs=48kHz)
Ripple: 0.005dB
Stopband: 100dB
p
Digital HPF
p
Power Supply: 5V
5%(Analog), 3.0 ~ 5.25V(Digital)
p
Power Dissipation: 183mW (@fs=48kHz)
p
Package: 28pin SOP / 28pin VSOP
p
AK5383/AK5393/AK5394A Semi-Pin compatible
TEST
Decimation
Filter
Delta-Sigma
Modulator
Decimation
Filter
HPF
HPF
Audio I/F
Controller
DVDD
AVDD
DVSS
AVSS
VREFR
VREFL
LIN+
LIN-
Delta-Sigma
Modulator
RIN+
RIN-
DIF
PDN
LRCK
BICK
MCLK
SDTO
HPFE
M/S DFS1 DFS0 CKS1 CKS0
VCOM
BVSS
OVF
Block diagram
24Bit 192kHz
ADC
AK5385A
ASAHI KASEI
[AK5385A]
MS0265-E-01
2003/11
- 2 -
n
Ordering Guide
AK5385AVS 10 ~ +70
C 28pin SOP (1.27mm pitch)
AK5385AVF 40 ~ +85
C 28pin VSOP (0.65mm pitch)
AKD5385A Evaluation Board for AK5385A
n
Pin Layout
VCOM
LIN+
DVDD
DVSS
VREFL
AVSS
LIN-
CKS0
PDN
DIF
M/S
LRCK
BICK
OVF
Top View
8
7
6
5
4
3
2
1
21
22
23
24
25
26
27
28
TEST
RIN+
AVSS
AVDD
RIN-
AVSS
VREFR
9
10
11
12
13
14
18
19
20
HPFE
15
16
17
SDTO
CKS1
MCLK
DFS1
BVSS
DFS0
ASAHI KASEI
[AK5385A]
MS0265-E-01
2003/11
- 3 -
n
Compatibility with AK5383/AK5394A
AK5385A
AK5383
AK5394A
Pin 1
VREFL
VREFL
VREFL+
Pin 2
AVSS
GNDL
VREFL
-
Pin 3
VCOM
VCOML
VCOML
Pin 6
CKS0
ZCAL
ZCAL
Pin 9
OVF
CAL
CAL
Pin 11
DIF
SMODE2
SMODE2
Pin 12
M/S
SMODE1
SMODE1
Pin 16
CKS1
FSYNC
FSYNC
Pin 18
DFS0
DFS
DFS0
Pin 20
DFS1
TEST
DFS1
Pin 26
TEST
VCOMR
VCOMR
Pin 27
AVSS
GNDR
VREFR
-
Pin 28
VREFR
VREFR
VREFR+
fs
8kHz
216kHz 1kHz
108kHz 1kHz
216kHz
MCLK at 48kHz
256/384/512fs
256fs
256fs
MCLK at 96kHz
256fs
128fs
128fs
MCLK at 192kHz
128fs
Not Available
64fs
DR, S/N
114dB
110dB
123dB
Input Voltage
2.9Vpp
2.45Vpp
2.4Vpp
Offset Calibration
Not Available
Available
Available
ASAHI KASEI
[AK5385A]
MS0265-E-01
2003/11
- 4 -
n
Compare PCB layout example between AK5385A and AK5383
3.0 ~ 5.25V
Digital
VREFL
GNDL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VCOML
AINL+
AINL-
ZCAL
VD
DGND
CAL
RSTN
SMODE2
SMODE1
LRCK
SCLK
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VREFR
GNDR
VCOMR
AINR+
AINR-
VA
AGND
BGND
TEST
HPFE
DFS
MCLK
FSYNC
SDATA
0.1
10
0.22
0.1
10
0.1
10
5V
Analog
Analog Ground
0.1
10
0.22
3.0 ~ 5.25V
Digital
VREFL
AVSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VCOM
LIN+
LIN-
CKS0
DVDD
DVSS
OVF
PDN
M/S
DIF
LRCK
BICK
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VREFR
AVSS
TEST
RIN+
RIN-
AVDD
AVSS
BVSS
DFS1
HPFE
DFS0
MCLK
CKS1
SDTO
10
0.22
0.1
10
0.1
10
5V
Analog
10
AK5385A
AK5383
0.1
Analog Ground
0.1
Pin #
AK5383
AK5385A
VREFL
VREFL
1
Lch Voltage Reference Output Pin, 3.75V
Normally, connected to GNDL with a 10
F
electrolytic capacitor and a 0.1
F ceramic capacitor.
Lch Voltage Reference Input Pin, AVDD
Normally, connected to AVSS with a 10
F
electrolytic capacitor and a 0.1
F ceramic capacitor.
ZCAL
CKS0
6
Zero Calibration Control Pin
This pin controls the calibration reference signal.
Master Clock Select 0 Pin
(Internal Pull-down Pin, typ. 100k
)
CAL
OVF
9
Calibration Active Signal Pin
Analog Input Overflow Detect Pin
SMODE2
DIF
11
Serial Interface Mode Select Pin
Audio Interface Format Pin
SMODE1
M/S
12
Serial Interface Mode Select Pin
Master / Slave Mode Pin
FSYNC
CKS1
16
Frame Synchronization Signal Pin
Master Clock Select 1 Pin
(Internal Pull-down Pin, typ.100k
)
DFS
DFS0
18
Double Speed Sampling Mode Pin
Sampling Speed Select 0 Pin
TEST
DFS1
20
Test Pin (Internal Pull-down Pin)
Sampling Speed Select 1 Pin
VCOMR
TEST
26
Rch Common Voltage Pin, 2.75V
Test Pin (Internal Pull-down Pin, typ. 100k
)
VREFR
VREFR
28
Rch Voltage Reference Output Pin, 3.75V
Normally, connected to GNDL with a 10
F
electrolytic capacitor and a 0.1
F ceramic capacitor.
Rch Voltage Reference Input Pin, AVDD
Normally, connected to AVSS with a 10
F
electrolytic capacitor and a 0.1
F ceramic capacitor.
ASAHI KASEI
[AK5385A]
MS0265-E-01
2003/11
- 5 -
n
Compare PCB layout example between AK5385A and AK5394A
3.0 ~ 5.25V
Digital
VREFL+
VREFL-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VCOML
AINL+
AINL-
ZCAL
VD
DGND
CAL
RSTN
SMODE2
SMODE1
LRCK
SCLK
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VREFR+
VREFR-
VCOMR
AINR+
AINR-
VA
AGND
BGND
DFS1
HPFE
DFS0
MCLK
FSYNC
SDATA
0.1
10
0.22
0.1
10
0.1
10
5V
Analog
Analog Ground
0.1
10
0.22
AK5394A
10
10
3.0 ~ 5.25V
Digital
VREFL
AVSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VCOM
LIN+
LIN-
CKS0
DVDD
DVSS
OVF
PDN
M/S
DIF
LRCK
BICK
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VREFR
AVSS
TEST
RIN+
RIN-
AVDD
AVSS
BVSS
DFS1
HPFE
DFS0
MCLK
CKS1
SDTO
0.1
10
0.22
0.1
10
0.1
10
5V
Analog
0.1
10
AK5385A
(short)
(short)
Analog Ground
Pin #
AK5394A
AK5385A
VREFL+
VREFL
1
Lch Positive Voltage Reference Output Pin, 3.75V
Normally connected to AGND with a large
electrolytic capacitor and connected to VREFL
-
with a 0.22
F ceramic capacitor.
Lch Voltage Reference Input Pin, AVDD
Normally, connected to AVSS with a 10
F
electrolytic capacitor and a 0.1
F ceramic capacitor.
VREFL
-
AVSS
2
Lch Negative Voltage Reference Output Pin, 1.25V
Normally connected to AGND with a large
electrolytic capacitor and connected to VREFL+
with a 0.22
F ceramic capacitor.
Analog Ground Pin
ZCAL
CKS0
6
Zero Calibration Control Pin
This pin controls the calibration reference signal.
Master Clock Select 0 Pin
(Internal Pull-down Pin, typ. 100k
)
CAL
OVF
9
Calibration Active Signal Pin
Analog Input Overflow Detect Pin
SMODE2
DIF
11
Serial Interface Mode Select Pin
Audio Interface Format Pin
SMODE1
M/S
12
Serial Interface Mode Select Pin
Master / Slave Mode Pin
FSYNC
CKS1
16
Frame Synchronization Signal Pin
Master Clock Select 1 Pin
(Internal Pull-down Pin, typ. 100k
)
VREFR
-
AVSS
27
Rch Negative Voltage Reference Output Pin, 1.25V
Normally connected to AGND with a large
electrolytic capacitor and connected to VREFR+
with a 0.22
F ceramic capacitor.
Analog Ground Pin
VCOMR
TEST
26
Rch Common Voltage Pin, 2.75V
Test Pin (Internal Pull-down Pin, typ. 100k
)
VREFR+
VREFR
28
Rch Positive Reference Output Voltage, 3.75V
Normally connected to AGND with a large
electrolytic capacitor and connected to VREFR
-
with a 0.22
F ceramic capacitor.
Rch Voltage Reference Input Pin, AVDD
Normally, connected to AVSS with a 10
F
electrolytic capacitor and a 0.1
F ceramic capacitor.
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