LTC2431 Linear Technology, LTC2431 Datasheet - Page 28

• Manufacturer Part Number: LTC2431
• Description: (LTC2430 / LTC2431) 20-Bit No Latency Delta-Sigma ADCs
• Manufacturer: Linear Technology

APPLICATIO S I FOR ATIO
LTC2430/LTC2431
28
Figure 20. Offset Error vs Output Data Rate and Temperature
Figure 22. – FS Error vs Output Data Rate and Temperature
10
Figure 24. Resolution (INL
vs Output Data Rate and Temperature
30
25
15
–5
22
21
19
17
15
20
10
20
18
16
9
8
7
6
5
4
3
2
1
0
5
0
0
0
0
V
V
V
F
V
V
F
V
V
F
REF
RES = LOG
O
INCM
CC
IN
O
O
INCM
CC
INCM
CC
10
= EXT OSC
10
10
OUTPUT DATA RATE (READINGS/SEC)
= EXT OSC
OUTPUT DATA RATE (READINGS/SEC)
= EXT OSC
OUTPUT DATA RATE (READINGS/SEC)
= 0V
–
= V
= V
= V
= GND
= V
20
= V
= V
REF
20 30
20 30
REF
REF
U
T
REFCM
REFCM
REFCM
A
2
= 5V
30
= 5V
= 5V
(V
= 85 C
REF
T
T
T
A
40
A
A
40
40
= 25 C
/INL
U
= 25 C
= 85 C
50
50
50
MAX
60
)
60
60
T
A
= 25 C
70
70
70
RMS
W
T
80
A
80
80
= 85 C
90
90 100
90 100
1LSB)
2431 F20
2431 F22
2430 F24
100
U
Figure 21. + FS Error vs Output Data Rate and Temperature
–20
–30
–10
–15
–25
Figure 23. Resolution (Noise
vs Output Data Rate and Temperature
–1
–2
–3
–4
–5
–5
22
21
20
19
18
17
16
15
5
4
3
2
1
0
5
0
0
0
0
Figure 25. Offset Error vs Output
Data Rate and V
V
V
REF
F
T
V
V
F
V
V
V
F
REF
RES = LOG
O
O
INCM
IN
A
INCM
CC
O
INCM
CC
IN
10
10
10
= EXT OSC
= 25 C
OUTPUT DATA RATE (READINGS/SEC)
= EXT OSC
OUTPUT DATA RATE (READINGS/SEC)
= EXT OSC
OUTPUT DATA RATE (READINGS/SEC)
= 0V
–
= 0V
–
= V
= V
= GND
= GND
= V
20
= V
= V
20 30
20 30
REF
REF
REFCM
REFCM
REFCM
2
30
= 5V
= 5V
(V
REF
T
T
40
40
A
A
40
= 85 C
= 25 C
/NOISE
T
A
50
CC
50
50
= 25 C
V
RMS
CC
60
60
T
60
A
V
= V
= 85 C
V
)
REF
70
70
CC
70
REF
RMS
= 2.7V
= 2.5V
80
80
80
= 5V
90 100
90
90 100
2431 F25
2431 F21
2431 F23
1LSB)
100
24301f