Datasheet

AD7401
Rev. D | Page 9 of 20
100
PSRR (dB)
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, using a 25 kHz brick wall filter, unless otherwise noted.
0
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 V
DD1
NO DECOUPLING
V
DD1
=V
DD2
=5V
1MHz CUTOFF FILTER
05851-006
Figure 6. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
–
90
–50
0 10k
INPUT FREQUENCY (Hz)
SINAD (dB)
–85
–80
–75
–70
–65
–60
–55
1k 2k 3k 4k 5k 6k 7k 8k 9k
V
DD1
=V
DD2
=5V
V
DD1
=V
DD2
=5V
MCLKIN = 16MHz
MCLKIN = 5MHz
MCLKIN = 10MHz
05851-027
Figure 7. SINAD vs. Analog Input Frequency
20
–180
03
FREQUENCY (kHz)
(dB)
0
0
–20
–40
–60
–80
–100
–120
–140
–160
5 10152025
4096 POINT FFT
f
IN
= 5kHz
SINAD = 81.984dB
THD = –96.311dB
DECIMATION BY 256
05851-042
Figure 8. Typical FFT (±200 mV Range)
–
90
–50
0.17 0.33
± INPUT AMPLITUDE (V)
SINAD (dB)
–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
V
DD1
=V
DD2
=5V
05851-028
Figure 9. SINAD vs. V
IN
0.4
–0.5
0 60k
CODE
DNL ERROR (LSB)
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
10k 20k 30k 40k 50k
V
IN
+ = –200mV TO +200mV
V
IN
– = 0V
05851-043
Figure 10. Typical DNL (±200 mV Range)
0.8
–0.4
0 60k
CODE
INL ERROR (LSB)
05851-044
0.6
0.4
0.2
0
–0.2
10k 20k 30k 40k 50k
V
IN
+ = –200mV TO +200mV
V
IN
–=0V
Figure 11. Typical INL (±200 mV Range)