
LTC2430/LTC2431
28
24301f
APPLICATIO S I FOR ATIO
WU
UU
Figure 23. Resolution (NoiseRMS ≤ 1LSB)
vs Output Data Rate and Temperature
Figure 24. Resolution (INLRMS ≤ 1LSB)
vs Output Data Rate and Temperature
Figure 21. + FS Error vs Output Data Rate and Temperature
Figure 22. – FS Error vs Output Data Rate and Temperature
Figure 20. Offset Error vs Output Data Rate and Temperature
Figure 25. Offset Error vs Output
Data Rate and VCC
OUTPUT DATA RATE (READINGS/SEC)
0
OFFSET
ERROR
(ppm
OF
V
REF
)
6
8
10
80
2431 F20
4
2
5
7
9
3
1
0
20
40
60
10
90
30
50
70
100
VINCM = VREFCM
VCC = VREF = 5V
VIN = 0V
FO = EXT OSC
TA = 85°C
TA = 25°C
OUTPUT DATA RATE (READINGS/SEC)
0
–30
+
FS
ERROR
(ppm
OF
V
REF
)
–25
–15
–10
–5
5
10
50
70
2431 F21
–20
0
40
90 100
20 30
60
80
VINCM = VREFCM
VCC = VREF = 5V
FO = EXT OSC
TA = 85°C
TA = 25°C
OUTPUT DATA RATE (READINGS/SEC)
0
–5
–
FS
ERROR
(ppm
OF
V
REF
)
0
10
15
20
30
10
50
70
2431 F22
5
25
40
90 100
20 30
60
80
VINCM = VREFCM
VCC = VREF = 5V
FO = EXT OSC
TA = 85°C
TA = 25°C
OUTPUT DATA RATE (READINGS/SEC)
0
15
RESOLUTION
(BITS)
16
18
19
20
22
10
50
70
2431 F23
17
21
40
90 100
20 30
60
80
VINCM = VREFCM
VCC = VREF = 5V
VIN = 0V
FO = EXT OSC
REF– = GND
RES = LOG2 (VREF/NOISERMS)
TA = 85°C
TA = 25°C
OUTPUT DATA RATE (READINGS/SEC)
0
15
RESOLUTION
(BITS)
16
18
19
20
22
10
50
70
2430 F24
17
21
40
90 100
20 30
60
80
VINCM = VREFCM
VCC = VREF = 5V
FO = EXT OSC
REF– = GND
RES = LOG2(VREF/INLMAX)
TA = 85°C
TA = 25°C
OUTPUT DATA RATE (READINGS/SEC)
10
OFFSET
ERROR
(ppm
OF
V
REF
)
1
3
5
90
2431 F25
–1
–3
0
2
4
–2
–4
–5
30
50
70
20
0
100
40
60
80
VINCM = VREFCM
VIN = 0V
REF– = GND
FO = EXT OSC
TA = 25°C
VCC = VREF = 5V
VCC = 2.7V
VREF = 2.5V