Datasheet

Data Sheet AD7490
Rev. D | Page 9 of 28
–50
–85
–80
–75
–70
–65
–60
–55
10
100
1000
02691-008
INPUT FREQUENCY (Hz)
THD (dB)
R
IN
= 1000Ω
R
IN
= 100Ω
R
IN
= 10Ω
R
IN
= 5Ω
f
S
= 1MSPS
T
A
= 25°C
V
DD
= 5.25V
RANGE = 0V
T
O REF
IN
Figure 9. THD vs. Analog Input Frequency
for Various Analog Source Impedances
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
0
512 1024 1536 2048 2560 3072 3584
4096
02691-009
CODE
INL ERROR (LSB)
V
DD
= V
DRIVE
= 5V
TEMPERA
TURE = 25°C
Figure 10. Typical INL
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
0 512 1024 1536 2048 2560 3072 3584 4096
02691-010
CODE
DNL ERROR (LSB)
V
DD
= V
DRIVE
= 5V
TEMPERATURE = 25°C
Figure 11. Typical DNL