AK5394A Datasheet, PDF (21/24 Pages) Asahi Kasei Microsystems – Super High Performance 192kHz 24-Bit ADC

ASAHI KASEI
[AK5394A]
5. Measurement example
Figure 11 plot is the THD+N vs Input Level with circuit Figure 9 and circuit Figure 10. X-AXIS is input level, Y-AXIS is
THD+N (ratio).
Measurement condition
Ta=25°C; VA=5.0V; VD=3.3V; AGND, BGND, DGND=0V; fs=48kHz; Input frequency=1kHz; 24 bit Output;
Measurement frequency =10Hz ∼ 20kHz; DFS0=“L”, DFS1=“L”, VREF capacitors=1000µF
Measured by Audio Precision System Two.
AKM
AK5394A THD+N vs Input Level
-80
-82.5
-85
-87.5
-90
-92.5
Figure 10
-95
-97.5
d
-100
B
-102.5
-105
-107.5
Figure 9
-110
-112.5
-115
-117.5
-120
-30
-28
-26
-24
-22
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
dBr
last.at2c
Figure 11. THD+N(ratio) vs. Input Level
Figure 12 shows the relationship between THD+N and Frequency with capacitors on Table 4. Input circuit uses Figure 9.
Measurement condition
Ta=25°C; VA=5.0V; VD=3.3V; AGND, BGND, DGND=0V; fs=48kHz; 24 bit Output; BW=10Hz ∼ 20kHz; DFS0=“L”,
DFS1=“L”, Measured by Audio Precision System Two.
AKM
AK5394A THD+N vs Frequency
-60
-65
-70
-75
220µF
100µF
-80
-85
-90
d
B
-95
F
S
-100
-105
-110
-115
-120
-125 ^1000µF
470µF
-130
10
20
50
100
200
500
1k
2k
Hz
last.at2c
Figure 12. THD+N vs. Frequency
10µF
5k
10k
20k
MS0137-E-01
- 21 -
2002/07