Datasheet

XTR105
13
SBOS061B
www.ti.com
FIGURE 6. Thermocouple Low Offset, Low Drift Loop Measurement with Diode Cold Junction Compensation.
14
1
12
5V
11
13
I
REG
< 1mA
4
3
2
6
R
G
1250Ω
XTR105
1/2
OPA2335
7
R
G
R
G
V
IN
–
V
IN
+
V
REG
I
R2
V+
I
RET
I
O
E
B
8
I
O
= 4mA + (V
IN
– V
IN
)
+ –
40
R
G
9
10
R
F
10kΩ
R
412Ω
1/2
OPA2335
V+
V–
Type J
25Ω
(G = 1 + = 50)
2R
F
R
50Ω
1kΩ
R
F
10kΩ
I
R1
V
LIN
R
CM
= 1250Ω
FIGURE 5. Input Bypassing Technique with Linearization.
14
11
12
13
4
3
2
R
G
XTR105
R
CM
7
1
0.01µF
0.01µF 0.01µF
R
Z
(1)
RTD
6
NOTE: (1) Bypass capacitors can be connected
to either the I
RET
pin or the I
O
pin.
R
G
R
G
V
IN
–
V
IN
+
V
LIN
I
R1
I
R2
V
REG
V+
I
RET
I
O
E
B
8
0.01µF
9
10
1kΩ
R
LIN1
R
LIN2
1kΩ