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LTC2492 Datasheet(PDF) 33 Page - Linear Technology

Part # LTC2492
Description  24-Bit 2-/4-Channel ?誇 ADC with Easy Drive Input Current Cancellation
PDF  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2492 Datasheet(HTML) 33 Page - Linear Technology

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LTC2492
33
2492fb
DIFFERENTIAL INPUT SIGNAL FREQUENCY (Hz)
48
–70
–80
–90
–100
–110
–120
–130
–140
54
58
2492 F29
50
52
56
60
62
NO AVERAGE
WITH
RUNNING
AVERAGE
OUTPUT DATA RATE (READINGS/SEC)
–10
10
30
50
0
20
40
20
40
60
80
2492 F30
100
10
030
50
70
90
VIN(CM) = VREF(CM)
VCC = VREF = 5V
VIN = 0V
FO = EXT CLOCK
TA = 85°C
TA = 25°C
OUTPUT DATA RATE (READINGS/SEC)
0
–3500
–3000
–2000
–1500
–1000
0
10
50
70
2492 F32
–2500
–500
40
90 100
20 30
60
80
VIN(CM) = VREF(CM)
VCC = VREF = 5V
FO = EXT CLOCK
TA = 85°C
TA = 25°C
OUTPUT DATA RATE (READINGS/SEC)
0
0
500
1500
2000
2500
3500
10
50
70
2492 F31
1000
3000
40
90 100
20 30
60
80
VIN(CM) = VREF(CM)
VCC = VREF = 5V
FO = EXT CLOCK
TA = 85°C
TA = 25°C
OUTPUT DATA RATE (READINGS/SEC)
0
10
12
16
18
20
24
10
50
70
2492 F33
14
22
40
90 100
20 30
60
80
VIN(CM) = VREF(CM)
VCC = VREF = 5V
VIN = 0V
FO = EXT CLOCK
RES = LOG 2 (VREF/NOISERMS)
TA = 85°C
TA = 25°C
OUTPUT DATA RATE (READINGS/SEC)
0
10
12
16
18
22
10
50
70
2492 F34
14
20
40
90 100
20 30
60
80
TA = 85°C
TA = 25°C
VIN(CM) = VREF(CM)
VCC = VREF = 5V
FO = EXT CLOCK
RES = LOG 2 (VREF/INLMAX)
APPLICATIONS INFORMATION
Figure 29. Input Normal Mode Rejection
2x Speed Mode with and Without Running
Averaging
Figure 30. Offset Error vs Output Data
Rate and Temperature
Figure 31. +FS Error vs Output Data
Rate and Temperature
Figure 32.–FS Error vs Output Data Rate
and Temperature
Figure 33. Resolution (NoiseRMS ≤ 1LSB)
vs Output Data Rate and Temperature
Figure 34. Resolution (INLMAX ≤ 1LSB)
vs Output Data Rate and Temperature
Figure 36. Resolution (NoiseRMS ≤ 1LSB)
vs Output Data Rate and Reference
Voltage
Figure 37. Resolution (INLMAX ≤ 1LSB)
vs Output Data Rate and Reference
Voltage
OUTPUT DATA RATE (READINGS/SEC)
0
–10
–5
5
10
20
10
50
70
2492 F35
0
15
40
90 100
20 30
60
80
VCC = 5V, VREF = 2.5V
VCC = VREF = 5V
VIN(CM) = VREF(CM)
VIN = 0V
FO = EXT CLOCK
TA = 25°C
OUTPUT DATA RATE (READINGS/SEC)
0
10
12
16
18
20
24
10
50
70
2492 F36
14
22
40
90 100
20 30
60
80
VIN(CM) = VREF(CM)
VIN = 0V
FO = EXT CLOCK
TA = 25°C
RES = LOG 2 (VREF/NOISERMS)
VCC = 5V, VREF = 2.5V
VCC = VREF = 5V
OUTPUT DATA RATE (READINGS/SEC)
0
10
12
16
18
22
10
50
70
2492 F37
14
20
40
90 100
20 30
60
80
VCC = 5V, VREF = 2.5V
VCC = VREF = 5V
VIN(CM) = VREF(CM)
VIN = 0V
REF– = GND
FO = EXT CLOCK
TA = 25°C
RES = LOG 2 (VREF/INLMAX)
Figure 35. Offset Error vs Output Data
Rate and Reference Voltage



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