aduc814aru-reel7 Analog Devices, Inc., aduc814aru-reel7 Datasheet - Page 14

• Manufacturer Part Number: aduc814aru-reel7
• Description: Microconverter, Small Package 12-bit Adc With Embedded Flash Mcu
• Manufacturer: Analog Devices, Inc.

ADuC814
Figure 9 and Figure 10 show the variation in worst-case positive
(WCP) DNL and worst-case negative (WCN) DNL versus
external reference input voltage.
–0.2
–0.4
–0.6
0.6
0.4
0.2
–0.50
–0.10
–0.15
–0.20
–0.25
–0.50
–0.10
–0.15
–0.20
–0.25
0
0.30
0.25
0.20
0.15
0.10
0.05
0.30
0.25
0.20
0.15
0.10
0.05
0
0
Figure 9. Typical Worst-Case DNL Error vs. V
0
0
AV
f
AV
f
0.5
S
S
= 152kHz
= 152kHz
DD
DD
511
511
/DV
/DV
Figure 7. Typical DNL Error, V
Figure 8. Typical DNL Error, V
DD
DD
1.0
1023
1023
EXTERNAL REFERENCE (V)
= 5V
= 3V
1535
1535
1.5
ADC CODES
ADC CODES
2047
2047
2.0
2559
2559
AV
f
2.5
DD
DD
S
= 152kHz
DD
= 5 V
= 3 V
3071
3071
WCP DNL
/DV
WCN DNL
REF
, V
DD
5.0
DD
3583
3583
= 5V
= 5 V
4095
4095
0.6
–0.2
–0.4
0.4
0.2
–0.6
0
Rev. A | Page 14 of 72
Figure 11 shows a histogram plot of 10,000 ADC conversion
results on a dc input with V
excellent code distribution pointing to the low noise
performance of the on-chip precision ADC.
Figure 12 shows a histogram plot of 10,000 ADC conversion
results on a dc input for V
very tight code distribution of 1 LSB with the majority of codes
appearing in one output bin.
–0.1
–0.3
–0.5
–0.7
0.7
0.5
0.3
0.1
10000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
8000
6000
4000
2000
Figure 10. Typical Worst-Case DNL Error vs. V
0
0
0.5
817
817
Figure 11. Code Histogram plot, V
Figure 12. Code Histogram Plot, V
1.0
EXTERNAL REFERENCE (V)
818
818
DD
1.5
DD
= 3 V. The plot again illustrates a
= 5 V. The plot illustrates an
CODE
CODE
819
819
2.0
2.5
AV
f
820
820
S
DD
DD
= 152kHz
DD
WCN DNL
= 5 V
= 3 V
/DV
WCP DNL
REF
3.0
, V
DD
DD
= 3V
821
821
= 3 V
0.7
0.5
0.3
0.1
–0.1
–0.3
–0.5
–0.7