ASAHI KASEI [AK5393]
8
AK5393
Enhanced Dual Bit ∆Σ 96kHz 24-Bit ADC
GENERAL DESCRIPTION
The AK5393 is a 24bit, 128x oversampling 2ch A/D Converter for professional digital audio systems. The
modulator in the AK5393 uses the new developed Enhanced Dual Bit architecture. This new architecture
achieves the wide dynamic range, while keeping much the same superior distortion characteristics as
conventional Single Bit way. The AK5393 performs 117dB dynamic range, so the device is suitable for
professional studio equipment such as digital mixer, digital VTR etc.
FEATURES
p Enhanced Dual Bit ADC
p Sampling Rate: 1kHz~108kHz
p Full Differential Inputs
p S/(N+D): 105dB
p DR: 117dB
p S/N: 117dB
p High Performance Linear Phase Digital Anti-Alias filter
• Passband: 0~21.768kHz(@fs=48kHz)
• Ripple: 0.001dB
• Stopband: 110dB
p Digital HPF & Offset Calibration for Offset Cancel
p Power Supply: 5V±5%(Analog), 3~5.25V(Digital)
p Power Dissipation: 470mW
p Package: 28pin SOP
p AK5392 Pin compatible
VREFL
GNDL
VCOML
AINL+
AINL-
ZCAL
AINR+
AINR-
VCOMR
VREFR
GNDR
HPF
HPF
Calibration
7
VD
FSYNC
SRAM
16
15
SDATA
19
HPFE
17
MCLK
18
DFS
DGNDVA
LRCK
SMODE2
12 11 14 13
1
2
3
4
5
6
25
24
26
28
27
Voltage
Reference
Delta-Sigma
Modulator
Delta-Sigma
Modulator
Voltage
Reference
AGND
BGND
Decimation
Filter
Decimation
Filter
Controller
212223
CAL
SCLKSMODE1
Serial Output
Interface
109
RST
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ASAHI KASEI [AK5393]
AINR+
n
Ordering Guide
AK5393-VS –10 ~ +70°C 28pin SOP
AKD5393 AK5393 Evaluation Board
n
Pin Layout
VREFL
GNDL
VCOML
AINL+
AINL-
ZCAL
VD 7
DGND
CAL
RST
SMODE2 11
SMODE1 12
LRCK
10
13
1
2
3
4
5
6
Top
View
8
9
28
27
26
25
24
23
22
21
20
19
18
17
16
VREFR
GNDR
VCOMR
AINR-
VA
AGND
BGND
TEST
HPFE
DFS
MCLK
FSYNC
SCLK
14
15
SDATA
n Compatibility with AK5392
AK5392 AK5393
Pin 18 CMODE DFS
fs (max) 54kHz 108kHz
MCLK (DFS ="L"@fs=48kHz) 256fs/384fs 256fs
MCLK (DFS ="H"@fs=96kHz) N/A 128fs
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ASAHI KASEI [AK5393]
PIN/FUNCTION
No. Pin Name I/O Function
1 VREFL O Lch Reference Voltage Pin, 3.75V
Normally connected to GNDL with a 10µ F electrolytic capacitor and
a 0.1µF ceramic capacitor .
2 GNDL - Lch Reference Ground Pin, 0V
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 RST
goes "H". CAL goes "L" after 8704 LRCK cycles for DFS="L",
17408 LRCK cycles for DFS ="H".
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
IISerial 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
H L Slave mode : I
H H Master mode : I
2
S : L/H
2
S : L/H
2
S : H/L
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".
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ASAHI KASEI [AK5393]
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(DFS="L") or 64fs(DFS="H") 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. 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
256fs at DFS="L", 128fs at DFS="H".
18 DFS I Double Speed Sampling Mode Pin
"L": Normal Speed
"H": Double Speed
19 HPFE I High Pass Filter Enable Pin
"L": Disable
"H": Enable
20 TEST I Test Pin (pull-down pin)
Should be connected to GND.
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 GNDR - Rch Reference Ground Pin, 0V
28 VREFR O Rch Reference Voltage Pin, 3.75V
Normally connected to GNDR with a 10µ F electrolytic capacitor and a 0.1µF
ceramic capacitor
Note: All digital inputs should not be left floating.
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ASAHI KASEI [AK5393]
ABSOLUTE MAXIMUM RATINGS
(AGND,BGND,DGND=0V; Note 1)
Parameter Symbol min max Units
Power Supplies: Analog
Digital
|BGND-DGND| (Note 2)
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
Notes: 1. All voltages with respect to ground.
2. AGND, BGND and DGND must be connected to t h e same analog ground plane.
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
VA
VD
∆GND
-0.3
-0.3
-
6.0
6.0
0.3
V
V
V
RECOMMENDED OPERATING CONDITIONS
(AGND,BGND,DGND=0V; Note 1)
Parameter Symbol min typ max Units
Power Supplies: Analog
(Note 3) Digital
Notes: 1. All voltages with respect to ground.
3. The power up sequence between VA and VD is not critical.
VA
VD
4.75
3.0
5.0
3.3
5.25
5.25
V
V
* AKM assumes no responsibility for the usage beyond the conditions in this data sheet.
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ASAHI KASEI [AK5393]
ANALOG CHARACTERISTICS
(Ta=25°C; VA=5.0V; VD=3.3V; AGND,BGND,DGND=0V; fs=48kHz; Signal Frequency=1kHz;
24bit Output; Measurement frequency=10Hz~20kHz; unless otherwise specified)
Parameter min typ max Units
Resolution 24 Bits
Analog Input Characteristics:
S/(N+D)
fs=48kHz -1dBFS
-20dBFS
-60dBFS
fs=96kHz
BW=40kHz
-1dBFS
-20dBFS
-60dBFS
98
96
105
-
-
94
54
103
-
-
85
45
dB
dB
dB
dB
dB
dB
Dynamic Range (-60dBFS with A-Weighted ) 112 117 dB
S/N ( A-Weighted ) 112 117 dB
Interchannel Isolation 110 120 dB
Interchannel Gain Mismatch 0.1 0.5 dB
Gain Drift 150 ppm/°C
Offset Error after calibration, HPF=OFF
after calibration, HPF=ON
±200
±1
±1000 LSB
LSB
24
24
Offset Drift (HPF=OFF) - ±10 - LSB24/°C
Offset Calibration Range (HPF=OFF) ±50 mV
Input Voltage (AIN+)-(AIN-) ±2.3 ±2.45 ±2.6 V
Input Impedance 2.4 4 kΩ
Power Supplies
Power Supply Current
VA
VD (fs=48kHz; DFS="L")
(fs=96kHz; DFS="H")
90
130
6
9
9
14
mA
mA
mA
Power Dissipation 470 680 mW
Power Supply Rejection (Note 4) 70 dB
Note: 4. DC to 26kHz. 110dB(typ) beyond 26kHz.
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