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LTC2400CS8 数据表(PDF) 35 Page - Linear Technology

部件名 LTC2400CS8
功能描述  24-Bit uPower No Latency ADC in SO-8
PDF  40 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC2400CS8 数据表(HTML) 35 Page - Linear Technology

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35
LTC2400
TYPICAL APPLICATIONS
VIN
SDO
SCK
CS
3
TYPE
S
6
2
5
4
5V
+
–
2
1
4
5
6
7
5V
10k
60Hz
50Hz
8
VREF
VCC
0.1
µF
GND
LTC2400
FO
2400 F36
VIN
S
LT1025
R–
GND
Figure 37. The LT1025 Complete Cold Junction Solution
A simpler, and potentially less expensive solution is the
use of the LT1025 as shown in Figure 37.
The LT1025 incorporates the functions of temperature
sensor, a precision divider chain required to produce the
appropriate correction for five different types of thermo-
couples, as well as curvature correction. The LT1025 must
be located at the cold junction. The use of a thermal mass
around the cold junction, as well as protection from air
currents, is advisable.
Simple Platinum RTD Interface
If high temperature resolution is required over a more
limited range, Figure 38 can resolve approximately
0.01
°C without additional amplification. The resistance of
a platinum RTD changes by approximately 0.31
Ω/°C at
TA = 25°C. The 100Ω to 300Ω source impedance of this
circuit does not compromise the stability, accuracy or
noise level of the LTC2400.
VIN
SDO
SCK
CS
3
FS
5V
2
R1*
12.1k
Pt RTD
100
Ω
1
4
*VISHAY S102 OR EQUIVALENT
5
6
7
5V
10k
60Hz
50Hz
8
VREF
VCC
0.1
µF
5V
GND
LTC2400
FO
2400 F37
Figure 38. Simplest Platinum RTD Interface



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