LTC2487 Linear Technology, LTC2487 Datasheet - Page 29

• Manufacturer Part Number: LTC2487
• Description: 16-Bit 2-/4-Channel ADC
• Manufacturer: Linear Technology

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applicaTions inForMaTion
–100
–110
–120
–130
–140
–1000
–1500
–2000
–2500
–3000
–3500
–80
–90
–500
–10
–70
20
15
10
–5
5
0
0
48
Figure 31. –FS Error vs Output Data
Rate and Temperature
Figure 34. Offset Error vs Output
Data Rate and Temperature
Figure 28. Input Normal Mode
Rejection 2x Speed Mode with and
Without Running Averaging
0
DIFFERENTIAL INPUT SIGNAL FREQUENCY (Hz)
0
V
V
F
T
V
V
F
O
A
IN(CM)
IN
O
IN(CM)
CC
10
10
= EXT CLOCK
= 25°C
OUTPUT DATA RATE (READINGS/SEC)
OUTPUT DATA RATE (READINGS/SEC)
= EXT CLOCK
50
= 0V
= V
20 30
20 30
V
= V
REF
= V
CC
52
REF(CM)
REF(CM)
= 5V
= 5V, V
T
A
40
40
54
= 85°C
REF
V
CC
50
50
NO AVERAGE
= 2.5V
56
= V
60
60
REF
T
A
58
70
70
RUNNING
= 5V
AVERAGE
= 25°C
WITH
80
80
60
90 100
90 100
2487 F28
2487 F34
2487 F31
62
–10
50
40
30
20
10
Figure 32. Resolution (Noise
vs Output Data Rate and Temperature
Figure 35. Resolution (Noise
vs Output Data Rate and Temperature
18
16
14
10
18
16
14
10
12
12
0
Figure 29. Offset Error vs Output Data
Rate and Temperature
0
0
0
V
V
V
F
V
V
F
RES = LOG 2 (V
V
V
F
T
RES = LOG 2 (V
O
O
O
A
IN(CM)
CC
IN
IN(CM)
CC
IN(CM)
IN
10
10
10
= EXT CLOCK
OUTPUT DATA RATE (READINGS/SEC)
= EXT CLOCK
= 25°C
= EXT CLOCK
OUTPUT DATA RATE (READINGS/SEC)
OUTPUT DATA RATE (READINGS/SEC)
= 0V
= 0V
= V
= V
20
20 30
20 30
REF
REF
= V
= V
= V
REF(CM)
= 5V
REF(CM)
REF(CM)
30
= 5V
T
REF
T
REF
40
T
A
40
V
40
A
A
CC
= 85°C
= 25°C
/INL
/NOISE
= 85°C
50
50
= 5V, V
50
MAX
60
60
60
RMS
)
REF
)
70
70
70
= 2.5V, 5V
T
RMS
A
80
RMS
80
80
= 25°C
90
90 100
90 100
2487 F32
≤ 1LSB)
2487 F35
≤ 1LSB)
2487 F29
100
3500
3000
2500
2000
1500
1000
–10
500
18
16
14
10
12
20
15
10
–5
0
Figure 33. Resolution (INL
vs Output Data Rate and Temperature
Figure 36. Resolution (INL
vs Output Data Rate and Temperature
5
0
0
0
0
Figure 30. +FS Error vs Output Data
Rate and Temperature
V
V
V
REF
F
T
RES = LOG 2 (V
V
V
F
T
O
V
V
F
CC
IN(CM)
IN
A
O
IN(CM)
IN
A
O
10
IN(CM)
CC
10
= EXT CLOCK
= 25°C
10
OUTPUT DATA RATE (READINGS/SEC)
= EXT CLOCK
= 25°C
OUTPUT DATA RATE (READINGS/SEC)
= 0V
–
OUTPUT DATA RATE (READINGS/SEC)
= EXT CLOCK
= 0V
= 5V, V
= GND
= V
20 30
20 30
20 30
= V
V
= V
REF
= V
CC
REF
REF(CM)
REF(CM)
REF(CM)
= 5V
= 5V, V
= 2.5V
REF
40
40
T
40
A
/INL
REF
V
= 85°C
50
CC
50
LTC2487
50
MAX
= 2.5V
= V
60
60
60
V
)
REF
CC
70
= V
70
70
= 5V
T
A
MAX
MAX
REF
= 25°C
80
80
80

= 5V
≤ 1LSB)
≤ 1LSB)
90 100
90 100
2487 F36
90 100
2487 F33
2487fa
2487 F30