2-2
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Chapter 2
Analog Input and Temperature Sensor Measurements
Analog Input Circuitry and Channel Pad
Configuration
When you use the SCB-68A with a 68-pin or 100-pin MIO DAQ device, you can use the
component pads on the SCB-68A to condition 16 AI channels. Figure 2-1 shows the analog
input and CJC circuitry on the SCB-68A.
Figure 2-1.
Analog Input and Cold-Junction Compensation Circuitry
AI 0
(I/O Pin 6
8
)
S
1.1
CJC Not U
s
ed
CJC U
s
ed
R
38
Q1
+5 V
C
3
(0.1
μ
F)
C5
(1
μ
F)
C
+5 V
G
AI
8
S
crew
Termin
a
l
(I/O Pin
3
4)
S
1.2
AI
8
(I/O Pin
3
4)
R
S
E CJC
or Non-MIO
DIFF CJC
AI
AI
AI
AI GND
D
+
U
s
er-Config
u
r
ab
le
A
+5 V
AI 0
S
crew
Termin
a
l
(I/O Pin 6
8
)
AI GND
B
+
U
s
er-Config
u
r
ab
le
F
