Datasheet

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SBOS146A − OCTOBER 1986 − REVISED AUGUST 2004
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15
R
1
+
−
2.5k
Ω
11
10
OPA21
8
7
3
4
0.01
µ
F15V
+V
CC
R
2
I
1
I
2
+V
CC
V
REF
=ImAR
2
XTR101
V
REF
Out
Figure 19. Dual Precision Current Sources Operated from One Supply
7
+
−
XTR101
4−20 mA
8
7
−
+
10
12
18
16
+V
2
722
−
V
2
C
2
C
1
−
V
1
+V
1
P+
E
V+
V
−
2
4
3
8
ISO100
I
REF2
1M
Ω
1M
Ω
250
Ω
1k
Ω
Isolation
Barrier
1
µ
F
1
µ
F
+15V
−
15V
V
OUT
(1)
+1V to +5V
NOTE: (1) Can be shifted and amplified
using ISO100 current sources.
I
REF1
30V
+
−
∆
e
IN
+15V
9
17
15
Figure 20. Isolated Two-Wire Current Loop