AK5394A Datasheet, PDF (17/24 Pages) Asahi Kasei Microsystems – Super High Performance 192kHz 24-Bit ADC

ASAHI KASEI
[AK5394A]
SYSTEM DESIGN
Figure 7 and 8 show the system connection diagram. An evaluation board [AKD5394A] is available which demonstrates
the optimum layout, power supply arrangements and measurement results.
+3.3~5V
Digital
Reset &
Cal Control
Mode
Select
System
Controller
Lch+
Lch-
+
10u
C+
1
C+
0.22u
2
0.22u
3
VREFL+
VREFL-
VCOML
VREFR+
VREFR-
VCOMR
28
0.22u
27
0.22u
26
+C
+C
4 AINL+
5 AINL-
6 ZCAL
AK5394A
AINR+ ²⁵
AINR- 24
VA 23
7 VD
0.1u
8 DGND
AGND 22
BGND 21
Rch+
Rch-
0.1u
+ _10u
9 CAL
DFS1 20
10 _RSTN
11 SMODE2
HPFE 19
DFS0 18
12 SMODE1
fs
13 LRCK
MCLK 17
FSYNC 16
14 SCLK
SDATA 15
+5V
Analog
System Ground
Analog Ground
Figure 7. Typical Connection Diagram
Notes:
- LRCK = fs, SCLK = 64fs.
- Power lines of VA and VD should be distributed separately from the point with low impedance of regulator etc.
- AGND, BGND and DGND must be connected to the same analog ground plane.
- All digital input pins should not be left floating.
- Refer Table 4 and Figure 12 about C.
Digital Ground
System
Controller
Analog Ground
1 VREFL+
VREFR+ 28
2 VREFL-
VREFR- 27
3 VCOML
VCOMR 26
4 AINL+
5 AINL-
6 ZCAL
AK5394A
AINR+ ²⁵
AINR- 24
VA 23
7 VD
AGND 22
8 DGND
BGND 21
9 CAL
DFS1 20
10 RSTN
HPFE 19
11 SMODE
DFS0 18
12 MCKS
MCLK 17
13 LRCK
FSYNC 16
14 SCLK
SDATA 15
Figure 8 Ground layout
MS0137-E-01
- 17 -
2002/07