AS1538/AS1540
Data Sheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
7 Typical Operating Characteristics
V
DD
= 3.6V; V
REF
= 2.5V (internal), f
SCL
= 3.4MHz, C
REF
= 4.7µF, T
AMB
= +25ºC (unless otherwise specified).
Figure 4. DNL vs. Digital Output Code, Int. Reference
Figure 5. INL vs. Digital Output Code, Int. Reference
1
0.8
0.6
0.8
f
SAMPLE
= 50ksps
1.2
f
SAMPLE
= 50ksps
DNL (LSB)
.
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0
1024
2048
3072
4096
INL (LSB)
.
0.4
0.4
0
-0.4
-0.8
-1.2
0
1024
2048
3072
4096
Digital Output Code
Digital Output Code
Figure 6. DNL vs. Digital Output Code, Ext. Reference
1
0.8
0.6
f
SAMPLE
= 50ksps
Figure 7. INL vs. Digital Output Code, Ext. Reference
1.2
0.8
f
SAMPLE
= 50ksps
DNL (LSB)
.
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0
1024
2048
3072
4096
INL (LSB)
.
0.4
0
-0.4
-0.8
-1.2
0
1024
2048
3072
4096
Digital Output Code
Digital Output Code
Figure 8. Offset Error vs. Temperature
6
4
Figure 9. Offset Matching vs. Temperature
1
0.8
0.6
Offset (LSB)
.
2
0
-2
-4
-6
-45 -30 -15
Offset (LSB)
.
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
0
15 30
45
60 75
90
-1
-45 -30 -15
0
15 30 45 60 75 90
Temperature (°C)
Temperature (°C)
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Revision 1.03
7 - 20
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