ASAHI KASEI
[AK5392]
0188-E-01
1997/11
- 1 -
AK5392
Enhanced Dual Bit
24Bit ADC
General Description
The AK5392 is a 24bit, 128x oversampling 2ch A/D Converterfor professional digital audio systems. The modulator
in the AK5392 uses the new developed Enhanced Dual Bit architecture. This new architecture achieves the wider
dynamic range, while keeping much the same superior distortion characteristics as conventional Single Bit way. The
AK5392 performs 116dB dynamic range, so the device is suitable for professional studio equipments such as digital
mixer, digital VTR etc.
Features
Enhanced Dual Bit ADC
Sampling Rate: 1kHz
54kHz
Full Differential Inputs
S/(N+D): 105dB
DR: 116dB
S/N: 116dB
High Performance Linear Phase Digital Anti-Alias filter
Passband: 0
21.768kHz(@fs=48kHz)
Ripple: 0.001dB
Stopband: 110dB
Digital HPF & Offset Calibration for Offset Cancel
Master Clock: 256/384fs
Power Supply: 5V
5%(Analog), 3
5.25V(Digital)
Power Dissipation: 470mW
Package: 28pin SOP
ASAHI KASEI
[AK5392]
0188-E-01
1997/11
- 2 -
Ordering Guide
AK5392-VS
-10
+70
C
28pin SOP
AKD5392
AK5392 Evaluation Board
Pin Layout
Compatibility with AK5391
1. Changed Specs
Parameter
AK5391
AK5392
HPF
No
Yes
Output Resolution
20/24bit
24bit
DR
113dB
116dB
Input Offset
Required
Not required
2. Pin Compatibility
The following pin functions are changed from AK5391. AK5392 supports 24bit only.
Pin No.
AK5391
AK5392
2
VREFL-
GNDL
19
SEL24
HPFE
27
VREFR-
GNDR
ASAHI KASEI
[AK5392]
0188-E-01
1997/11
- 3 -
PIN/FUNCTION
No.
Pin Name
I/O
Function
1
VREFL
O
Lch Reference Voltage Pin, 3.75V
Normally connected to GNDL with a 10uF electrolytic capacitor and
a 0.1uF ceramic capacitor
2
GNDL
-
Lch Reference Ground Pin, 0V
3
VCOML
O
Lch Common Voltage Pin, 2.5V
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
RST
goes "H". CAL goes "L" after 8704 LRCK cycles.
10
RST
I
Reset Pin
When "L", 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 I2S
: H/L
H
L
Slave mode : I2S
: L/H
H
H
Master mode : I2S
: L/H
13
LRCK
I/O
Left/Right Channel Select Clock Pin
LRCK goes "H" at SMODE2="L" and "L" at SMODE2="H" during reset
when SMODE1 "H".
ASAHI KASEI
[AK5392]
0188-E-01
1997/11
- 4 -
14
SCLK
I/O
Serial Data Clock Pin
Data is clocked out on the falling edge of SCLK.
Slave mode:
SCLK requires more than 48fs clock.
Master mode:
SCLK outputs a 128fs clock. SCLK stays "L" during reset.
15
SDATA
O
Serial Data Output Pin
MSB first, 2's complement. SDATA stays "L" during reset.
16
FSYNC
I/O
Frame Synchronization Signal Pin
Slave mode:
When "H", the data bits are clocked out on SDATA.
Master mode:
FSYNC outputs 2fs clock.
FSYNC stays "L" during reset.
17
CLK
I
Master Clock Input Pin
CMODE="H":384fs
CMODE="L":256fs
18
CMODE
I
Master Clock Select Pin
"L": CLK=256fs (12.288MHz @fs=48kHz)
"H": CLK=384fs (18.432MHz @fs=48kHz)
19
HPFE
I
High Pass Filter Enable Pin
"L": Disable
"H": Enable
20
TEST
I
Test Pin
Should be connected DGND.
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, 2.5V
27
GNDR
-
Rch Reference Ground Pin, 0V
28
VREFR
O
Rch Reference Voltage Pin, 3.75V
Normally connected to GNDR with a 10uF electrolytic capacitor and
a 0.1uF ceramic capacitor
ASAHI KASEI
[AK5392]
0188-E-01
1997/11
- 5 -
ABSOLUTE MAXIMUM RATINGS
(AGND,BGND,DGND=0V; Note 1 )
Parameter
Symbol
min
max
Units
Power Supplies: Analog
Digital
|BGND-DGND| (Note 2 )
VA
VD
GND
-0.3
-0.3
-
6.0
6.0
0.3
V
V
V
Input Current, Any Pin Except Supplies
IIN
-
10
mA
Analog Input Voltage
VINA
-0.3
VA+0.3
V
Digital Input Voltage
VIND
-0.3
VD+0.3
V
Ambient Temperature (power applied)
Ta
-10
70
C
Storage Temperature
Tstg
-65
150
C
Note: 1 . All voltages with respect to ground.
2 . AGND and BGND must be same voltage.
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(AGND,BGND,DGND=0V; Note 1 )
Parameter
Symbol
min
typ
max
Units
Power Supplies: Analog
(Note 3 ) Digital
VA
VD
4.75
3.0
5.0
3.3
5.25
5.25
V
V
Notes: 1 . All voltages with respect to ground.
3 . The power up sequence between VA and VD is not critical.
* AKM assumes no responsibility for the usage beyond the conditions in this data
sheet.
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