AD7401
Rev. D | Page 9 of 20
100
P
S
RR
(
d
B)
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, using a 25 kHz brick wall filter, unless otherwise noted.
0
1000
SUPPLY RIPPLE FREQUENCY (kHz)
90
80
70
60
50
40
30
20
10
100
200
300
400
500
600
700
800
900
MCLKIN = 16MHz
MCLKIN = 5MHz
MCLKIN = 10MHz
200mV p-p SINE WAVE ON VDD1
NO DECOUPLING
VDD1 =VDD2 =5V
1MHz CUTOFF FILTER
05
85
1-
00
6
Figure 6. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
–90
–50
0
10k
INPUT FREQUENCY (Hz)
S
INA
D
(
d
B)
–85
–80
–75
–70
–65
–60
–55
1k
2k
3k
4k
5k
6k
7k
8k
9k
VDD1 =VDD2 =5 V
VDD1 =VDD2 =5V
MCLKIN = 16MHz
MCLKIN = 5MHz
MCLKIN = 10MHz
05
85
1-
02
7
Figure 7. SINAD vs. Analog Input Frequency
20
–180
03
FREQUENCY (kHz)
(dB
)
0
–20
–40
–60
–80
–100
–120
–140
–160
5
10152025
4096 POINT FFT
fIN = 5kHz
SINAD = 81.984dB
THD = –96.311dB
DECIMATION BY 256
05
85
1-
04
2
Figure 8. Typical FFT (±200 mV Range)
–90
–50
0.17
0.33
± INPUT AMPLITUDE (V)
S
INA
D
(
d
B)
–85
–80
–75
–70
–65
–60
–55
0.18 0.19 0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.30 0.31 0.32
MCLKIN = 16MHz
MCLKIN = 10MHz
VDD1 =VDD2 =5V
05
85
1-
02
8
Figure 9. SINAD vs. VIN
0.4
–0.5
0
60k
CODE
D
N
L
E
R
RO
R
(L
S
B
)
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
10k
20k
30k
40k
50k
VIN+ = –200mV TO +200mV
VIN– = 0V
05
85
1-
04
3
Figure 10. Typical DNL (±200 mV Range)
0.8
–0.4
0
60k
CODE
INL
E
RRO
R
(
L
S
B)
05
85
1-
04
4
0.6
0.4
0.2
0
–0.2
10k
20k
30k
40k
50k
VIN+ = –200mV TO +200mV
VIN–= 0V
Figure 11. Typical INL (±200 mV Range)