ADUC814BRU View Datasheet(PDF) - Analog Devices
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ADUC814BRU Datasheet PDF : 72 Pages
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TYPICAL PERFORMANCE CURVES
The typical performance plots presented in this section
illustrate typical performance of the ADuC814 under various
operating conditions. Note that all typical plots in this section
were generated using the ADuC814BRU, i.e., the B-grade part.
Figure 3 and Figure 4 show typical ADC integral nonlinearity
(INL) errors from ADC Code 0 to Code 4095 at 5 V and 3 V
supplies, respectively. The ADC is using its internal reference
(2.5 V) and operating at a sampling rate of 152 kHz. The typical
worst-case errors in both plots are just less than 0.3 LSBs.
0.4
AVDD/DVDD = 5V
0.3 fS = 152kHz
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
0
511 1023 1535 2047 2559 3071 3583 4095
ADC CODES
Figure 3. Typical INL Error, VDD = 5 V
0.4
AVDD/DVDD = 3V
0.3 fS = 152kHz
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
0
511 1023 1535 2047 2559 3071 3583 4095
ADC CODES
Figure 4. Typical INL Error, VDD = 3 V
ADuC814
Figure 5 and Figure 6 show the variation in worst-case positive
(WCP) INL and worst-case negative (WCN) INL versus
external reference input voltage.
1.2
0.6
AVDD /DVDD = 5V
1.0
fS = 152kHz
0.4
0.8
0.6
0.2
WCP INL
0.4
0
0.2
0
–0.2
–0.4
–0.2
WCN INL
–0.4
–0.6
–0.6
0.5
1.0
1.5
2.0
2.5
5.0
EXTERNAL REFERENCE (V)
Figure 5. Typical Worst-Case INL Error vs. VREF, VDD = 5 V
0.8
0.8
AVDD/DVDD = 3V
0.6
fS = 152kHz
0.6
0.4
WCP INL
0.4
0.2
0.2
0
0
–0.2
–0.2
–0.4
WCN INL
–0.4
–0.6
–0.6
–0.8
–0.8
0.5
1.0
1.5
2.0
2.5
3.0
EXTERNAL REFERENCE (V)
Figure 6. Typical Worst-Case INL Error vs. VREF, VDD = 3 V
Figure 7 and Figure 8 show typical ADC differential nonlinearity
(DNL) errors from ADC Code 0 to Code 4095 at 5 V and 3 V
supplies, respectively. The ADC is using its internal reference
(2.5 V) and operating at a sampling rate of 152 kHz. The typical
worst-case errors in both plots are just less than 0.2 LSBs.
Rev. A | Page 13 of 72
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