ADT7518
Rev. A | Page 15 of 40
TEMPERATURE (?/SPAN>C)
30
0
40
85
120
1.5
1.0
0.5
0
0.5
1.0
EXTERNAL TEMPERATURE @ 3.3V
INTERNAL TEMPERATURE @ 5V
INTERNAL TEMPERATURE @ 3.3V
EXTERNAL TEMPERATURE @ 5V
Figure 28. Internal Temperature Error @ 3.3 V and 5 V
1
0
1
2
3
2
3
4
V
DD
= 3.3V
40
20
0
TEMPERATURE (?/SPAN>C)
20
40
60
80
100
120
GAIN ERROR
OFFSET ERROR
Figure 29. ADC Offset Error and Gain Error vs. Temperature
V
DD
(V)
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
3
2
1
0
1
2
3
OFFSET ERROR
GAIN ERROR
Figure 30. ADC Offset Error and Gain Error vs. V
DD
15
10
5
0
5
10
15
20
25
0
10
20
PCB LEAKAGE RESISTANCE (M&)
30
40
50
60
70
80
90 100
V
DD
= 3.3V
TEMPERATURE = 25?/SPAN>C
D+ TO GND
D+ TO V
CC
Figure 31. External Temperature Error vs. PCB Leakage Resistance
60
50
40
30
20
10
0
V
DD
= 3.3V
0
5
10
15
20
25
CAPACITANCE (nF)
30
35
40
45
50
Figure 32. External Temperature Error vs. Capacitance between D+ and D
10
0
2
4
6
8
2
4
6
NOISE FREQUENCY (Hz)
V
DD
= 3.3V
COMMON-MODE
VOLTAGE = 100mV
1
100
200
300
400
500
600
Figure 33. External Temperature Error vs. Common-Mode Noise Frequency
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