Datasheet

AD7440/AD7450A
Rev. C | Page 13 of 28
3.0
–1.0
–0.5
0
0.5
1.0
1.5
2.0
2.5
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
03051-A-013
V
REF
(V)
CHANGE IN DNL (LSB)
POSITIVE DNL
NEGATIVE DNL
Figure 13. Change in DNL vs. V
REF
for the AD7450A for V
DD
= 5 V
2.5
–1.0
–0.5
0
0.5
1.0
1.5
2.0
0 0.5 1.0 1.5 2.0 2.2 2.5
03051-A-014
V
REF
(V)
CHANGE IN DNL (LSB)
POSITIVE DNL
NEGATIVE DNL
Figure 14. Change in DNL vs. V
REF
for the AD7450A for V
DD
= 3 V
5
–5
–4
–3
–2
–1
0
1
2
3
4
0 0.5 1.0 1.5 2.52.0 3.0 3.5
03051-A-015
V
REF
(V)
CHANGE IN INL (LSB)
POSITIVE INL
NEGATIVE INL
Figure 15. Change in INL vs. V
REF
for the AD7450A for V
DD
= 5 V
2.5
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
2.0
0 0.5 1.0 1.5 2.0 2.2 2.5
03051-A-016
V
REF
(V)
CHANGE IN INL (LSB)
POSITIVE INL
NEGATIVE INL
Figure 16. Change in INL vs. V
REF
for the AD7450A for V
DD
= 3 V
8
0
1
2
3
4
5
6
7
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
03051-A-017
V
REF
(V)
ZERO-CODE ERROR (LSB)
V
DD
= 5V
V
DD
= 3V
Figure 17. Change in Zero-Code Error vs. Reference Voltage for
V
DD
= 5 V and 3 V for the AD7450A
12.0
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
03051-A-018
V
REF
(V)
EFFECTIVE NUMBER OF BITS
V
DD
= 5V
V
DD
= 3V
Figure 18. Change in ENOB vs. Reference Voltage for V
DD
= 5 V and 3 V
for the AD7450A