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LTC2485CDD Datasheet(PDF) 33 Page - Linear Technology

Part # LTC2485CDD
Description  24-Bit ?誇 ADC with Easy Drive Input Current Cancellation and I2C Interface
PDF  40 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2485CDD Datasheet(HTML) 33 Page - Linear Technology

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LTC2485
2485fa
APPLICATIO S I FOR ATIO
Figure 43. Input Normal Mode Rejection 2x Speed Mode
Figure 42. Input Normal Mode Rejection vs Input
Frequency, 2x Speed Mode and 50Hz/60Hz Mode
Figure 41. Input Normal Mode Rejection 2x Speed Mode
Figure 40. Input Normal Mode Rejection 2x Speed Mode
Figure 44. Calibration Setup
INPUT SIGNAL FREQUENCY (fN)
2485 F40
0
–20
–40
–60
–80
–100
–120
0
fN
2fN 3fN 4fN 5fN
6fN 7fN
8fN
INPUT SIGNAL FREQUENCY (fN)
2485 F41
0
–20
–40
–60
–80
–100
–120
250
248
252 254 256 258 260 262 264
INPUT FREQUENCY (Hz)
0
50
100 125
225
2485 F42
25
75
150 175 200
0
–20
–40
–60
–80
–100
–120
VCC = 5V
VREF = 5V
VINCM = 2.5V
VIN(P-P) = 5V
TA = 25°C
MEASURED DATA
CALCULATED DATA
DIFFERENTIAL INPUT SIGNAL FREQUENCY (Hz)
48
–70
–80
–90
–100
–110
–120
–130
–140
54
58
2485 F43
50
52
56
60
62
NO AVERAGE
WITH
RUNNING
AVERAGE
SCL
SDA
CA1
CA0/F0
6
7
9
10
VCC
5V
LTC2485
REF+
GND
IN–
IN+
1
ISOTHERMAL
2
C7
0.1
µF
1.7k
C8
1
µF
4
R2
2k
R7
8k
6
2
5
4
R8
1k
5
2485 F44
26.3C
TYPE K
THERMOCOUPLE
JACK
(OMEGA MPJ-K-F)
8
3
REF–
IN OUT
G1
NC1M4V0
TRIM
GND
LT1236
+
1.7k



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