AK4490 Datasheet, PDF (60/68 Pages) Asahi Kasei Microsystems – Premium 32-Bit 2ch DAC

[AK4490]
10. Recommended External Circuits
Figure 38 shows the system connection diagram. Figure 40, Figure 41 and Figure 42 show the analog output
circuit examples. The evaluation board (AKD4490) demonstrates the optimum layout, power supply
arrangements and measurement results.
DSP
Micro-
Controller
Digital 3.3V Analog 3.3V
+
10u
0.1u
10u
0.1u
220u
0.1u
10u
0.1u
Analog 5.0V
1 NC
2 PDN
3 BICK
4 SDATA
5 LRCK
6 WCK
7 SMUTE/CSN
8 SD/CCLK/SCL
9 SLOW/CDTI/SDA
10 DIF0/DZFL
11 DIF1/DZFR
12 DIF2/CAD0
AOUTLP 36
AOUTLN 35
VDDL 34 _{0.1u 10u}
VDDL 33
+
VSSL 32
VSSL 31
VSSR 30
N
VSSR
0.1u 10u
29
VDDR 28
+
VDDR 27
AOUTRN 26
AOUTRP ₂₅
Lch
Lch
LPF Mute
Lch Out
Rch
Rch
LPF Mute
Rch Out
Digital
Ground
0.1u
220u
0.1u
10u
Analog
Ground
+
Electrolytic Capacitor
Ceramic Capacitor
Notes:
- Chip Address = “00”. BICK = 64fs, LRCK = fs
- Power lines of AVDD and DVDD should be distributed separately from the point with low impedance of
regulator etc.
- AVSS, DVSS, VSSL, VSSR, VREFLL and VREFLR must be connected to the same analog ground plane.
- When AOUT drives a capacitive load, some resistance should be connected in series between AOUT and
the capacitive load.
- All input pins except pull-down/pull-up pins should not be allowed to float.
Figure 38. Typical Connection Diagram (AVDD=3.3V, VDDL/R=5V, DVDD=3.3V, Serial control mode)
MS1648-E-03
- 60 -
2014/11