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Электронный компонент: AK5394A

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ASAHI KASEI
[AK5394A]
MS0137-E-01
2002/07
- 1 -
GENERAL DESCRIPTION
The AK5394A is a 24bit, 192kHz sampling 2ch A/D Converter for professional digital audio systems. The
modulator in the AK5394A uses the new developed advanced multi bit architecture. This new
architecture achieves the wide dynamic range and wide bandwidth, while keeping superior distortion
characteristics. The AK5394A performs 123dB dynamic range, so the device is suitable for professional
studio equipment such as digital mixer, digital VTR etc. The operating voltages support analog 5V and
digital 3.3V, so it is easy to I/F with 3.3V logic IC.
FEATURES
128x Oversampling
New advanced multi bit Architecture ADC
Sampling Rate: 1kHz
216kHz
Full Differential Inputs
S/(N+D): 110dB
DR: 123dB
S/N: 123dB
High Performance Linear Phase Digital Anti-Alias filter
Passband: 0
21.768kHz(@fs=48kHz)
Ripple: 0.001dB
Stopband: 120dB
Digital HPF & Offset Calibration for Offset Cancel
Power Supply: 5V
5%(Analog), 3
5.25V(Digital)
Power Dissipation: 665mW
Package: 28pin SOP
AK5392/3 Semi-Pin Compatible
LRCK
VREFL+
VREFL-
SCLK
SMODE1
FSYNC
Serial Output
Interface
SMODE2
DGND
VA
AGND
BGND
CAL
RSTN
VD
Controller
SDATA
MCLK
DFS0
HPFE
ZCAL
AINR-
VREFR-
Delta-Sigma
Modulator
Voltage
Reference
Decimation
Filter
HPF
HPF
Calibration
SRAM
VCOML
AINL+
AINL-
AINR+
VCOMR
VREFR+
12
11
14
13
16
15
19
17
18
8
7
10
9
21
22
23
27
28
26
24
25
6
5
4
3
2
1
DFS1
20
Delta-Sigma
Modulator
Voltage
Reference
Decimation
Filter
AK5394A
Super High Performance 192kHz 24-Bit
ADC
ASAHI KASEI
[AK5394A]
MS0137-E-01
2002/07
- 2 -
Ordering Guide
AK5394AVS
10
+70
C
28pin SOP
AKD5394A
AK5394A Evaluation Board
Pin Layout
6
5
4
3
2
1
VREFL+
VREFL-
AINL+
VCOML
AINL-
ZCAL
VD
7
DGND
8
Top
View
10
9
CAL
RSTN
SMODE2
11
SMODE1
12
13
14
LRCK
SCLK
VREFR+
VREFR-
VCOMR
AINR+
AINR-
VA
AGND
BGND
DFS1
HPFE
DFS0
MCLK
23
24
25
26
27
28
22
21
19
20
18
17
16
15
FSYNC
SDATA
Compatibility with AK5392/3
AK5394A
AK5393
AK5392
Pin 2
VREFL
-
GNDL
GNDL
Pin 18
DFS0
DFS
CMODE
Pin 20
DFS1
TEST
TEST
Pin 27
VREFR
-
GNDR
GNDR
fs (max)
216kHz
108kHz
54kHz
MCLK at 48kHz
256fs
256fs
256fs or 384fs
MCLK at 96kHz
128fs
128fs
N/A
MCLK at 192kHz
64fs
N/A
N/A
DR
123dB
117dB
116dB
S/N
123dB
117dB
116dB
ASAHI KASEI
[AK5394A]
MS0137-E-01
2002/07
- 3 -
Common PCB layout example between AK5393 and AK5394A
Pin#
AK5393
AK5394A
GNDL
VREFL
-
2
Connected to AGND
Connected to AGND with a 10uF electrolytic capacitor, and
connected to VREFL+ with a 0.22uF ceramic capacitor.
18
DFS
DFS0
20
TEST
DFS1
GNDR
VREFR
-
27
Connected to AGND
Connected to AGND with a 10uF electrolytic capacitor, and
connected to VREFR+ with a 0.22uF ceramic capacitor.
0.1u
0.22u
+
10u
VREFL+
1
GNDL
2
VCOML
3
AINL+
4
AINL-
5
ZCAL
6
VD
7
DGND
8
CAL
9
RSTN
10
SMODE2
11
SMODE1
12
VREFR+
28
GNDR
27
VCOMR
26
AINR+
25
AINR-
24
VA
23
AGND
22
BGND
21
TEST
20
HPFE
19
DFS
18
MCLK
17
AK5393
13
14
16
15
LRCK
SCLK
FSYNC
SDATA
+3.3~5V
Digital
10u
+
0.1u
+5V
Analog
0.1u
0.1u
(short )
0.22u
10u
+
+
10u
0.22u
10u
+
0.22u
+
10u
VREFL+
1
VREFL-
2
VCOML
3
AINL+
4
AINL-
5
ZCAL
6
VD
7
DGND
8
CAL
9
RSTN
10
SMODE2
11
SMODE1
12
VREFR+
28
VREFR-
27
VCOMR
26
AINR+
25
AINR-
24
VA
23
AGND
22
BGND
21
DFS1
20
HPFE
19
DFS0
18
MCLK
17
AK5394A
13
14
16
15
LRCK
SCLK
FSYNC
SDATA
+3.3~5V
Digital
10u
+
0.1u
+5V
Analog
0.1u
0.22u
10u
0.22u
10u
+
+
+
10u
(short )
(Analog
Ground)
(Analog
Ground)
ASAHI KASEI
[AK5394A]
MS0137-E-01
2002/07
- 4 -
PIN/FUNCTION
No.
Pin Name
I/O
Function
1
VREFL+
O
Lch Positive Reference Voltage, 3.75V
Normally connected to AGND with a large electrolytic capacitor and connected to
VREFL
-
with a 0.22
F ceramic capacitor.
2
VREFL
-
O
Lch Negative Reference Voltage, 1.25V
Normally connected to AGND with a large electrolytic capacitor and connected to
VREFL+ with a 0.22
F ceramic capacitor.
3
VCOML
O
Lch Common Voltage Pin, 2.75V
4
AINL+
I
Lch Analog positive input Pin
5
AINL-
I
Lch Analog negative input Pin
6
ZCAL
I
Zero Calibration Control Pin
This pin controls the calibration reference signal.
"L" :VCOML and VCOMR
"H" : Analog Input Pins (AINL
, AINR
)
7
VD
-
Digital Power Supply Pin, 3.3V
8
DGND
-
Digital Ground Pin, 0V
9
CAL
O
Calibration Active Signal Pin
"H" means the offset calibration cycle is in progress. Offset calibration starts
when RSTN pin goes "H". CAL goes "L" after 8704 LRCK cycles for DFS pin =
"L", 17408 LRCK cycles for DFS pin = "H".
10
RSTN
I
Reset Pin
When "L", the digital section is powered-down. Upon returning "H", an offset
calibration cycle is started. An offset calibration cycle should always be initiated
after power-up.
11
12
SMODE2
SMODE1
I
I
Serial Interface Mode Select Pin
MSB first, 2's compliment.
SMODE2 SMODE1 MODE LRCK
L L Slave mode : MSB justified : H/L
L H Master mode : Similar to I
2
S : H/L
H L Slave mode : I
2
S : L/H
H H Master mode : I
2
S : L/H
13
LRCK
I/O
Left/Right Channel Select Clock Pin
When RSTN pin = "L" in master mode, LRCK outputs "L".
ASAHI KASEI
[AK5394A]
MS0137-E-01
2002/07
- 5 -
14
SCLK
I/O
Serial Data Clock Pin
SDATA is clocked out on the falling edge of SCLK.
Slave mode:
SCLK requires more than 48fs clock.
Master mode:
AK5394A outputs following clocks as SCLK.
Normal Speed Mode: 128fs
Double Speed Mode: 64fs
Quad Speed Mode: 64fs
When RSTN pin = "L", SCLK outputs "L"(normal/double speed mode) or
outputs the inverted MCLK (quad speed mode).
15
SDATA
O
Serial Data Output Pin
MSB first, 2's complement.
16
FSYNC
I/O
Frame Synchronization Signal Pin
Slave mode:
When "H", the data bits are clocked out on SDATA. In I
2
S mode, FSYNC is
don't care.
Master mode:
FSYNC outputs 2fs clock.
FSYNC stays "L" during reset.
17
MCLK
I
Master Clock Input Pin
DFS1 DFS0 MCLK fs(typ)
L L 256fs 48kHz
L H 128fs 96kHz
H L 64fs 192kHz
H H (N/A) (N/A)
18
DFS0
I
Sampling Speed Select Pin 0
DFS1 DFS0 fs(typ)
L L 48kHz
L H 96kHz
H L 192kHz
H H (N/A)
19
HPFE
I
High Pass Filter Enable Pin
"L": Disable
"H": Enable
20
DFS1
I
Sampling Speed Select Pin 1
(see #18 DFS0)
21
BGND
-
Substrate Ground Pin, 0V
22
AGND
-
Analog Ground Pin, 0V
23
VA
-
Analog Supply Pin, 5V
24
AINR
-
I
Rch Analog negative input Pin
25
AINR+
I
Rch Analog positive input Pin
26
VCOMR
O
Rch Common Voltage Pin, 2.75V
27
VREFR
-
O
Rch Negative Reference Voltage, 1.25V
Normally connected to AGND with a large electrolytic capacitor and connected to
VREFR+ with a 0.22
F ceramic capacitor.
28
VREFR+
O
Rch Positive Reference Voltage, 3.75V
Normally connected to AGND with a large electrolytic capacitor and connected to
VREFR- with a 0.22
F ceramic capacitor.
Note: All digital inputs should not be left floating.