參數(shù)資料
型號: ISO100CP
元件分類: 隔離放大器
英文描述: Optically-Coupled Linear ISOLATION AMPLIFIER
中文描述: 光耦合線性隔離放大器
文件頁數(shù): 13/15頁
文件大小: 202K
代理商: ISO100CP
ISO100
13
FIGURE 14. Three-Port Isolation Thermocouple Amplifier
(Bipolar).
FIGURE 15. Isolated Test Equipment Amplifier (Unipolar
with Offsetting).
FIGURE 16. Isolated 4mA to 20mA Transmitter (Example of an isolated voltage controlled current source).
T
7
9
15
+
17
ISO100
3
18
16
R
F
1M
8
V
O
= I
IN
R
F
(±10V)
1012
Isolation Barrier
C
F
4
0.001μF
2
R
3
15k
R
2
15k
+V
C
–V
C
–V
+V
p+
722
Isolated
Power
Supply
V+
E
V–
C
0.001μF
C
C
1
0.47μF
C
may be used to
improve frequency
response (reduce peaking).
f
O
= 1/2
π
R
F
C
F
R
and R
are required to maintain
a 3mA minimum load to the 722.
Cold junction
compensation
not shown.
R
4
1k
V = 10mV
(±Temp)
R
1
1.2k
+15V
7
9
15
+
17
ISO100
3
18
16
8
V
OUT
Gain = +10 to +1000
V
IN
+
R
1
100k
R
2
1k
R
3
2M
R
4
100k
Offsetting
+15V
–15V
R
F
1M
C
F
Approximate input offsetting = 0 to ±7.5μA for
isolated supplies—see Figures 10 and 11.
Gain
Adjust
Siliconix
VN88AF
7
9
15
+
17
3
18
2
Input
–5V to 0V
R
IN
500
R
3
200
+
R
2
500k
16
R
1
1M
Span Adjust
R
4
335k
For isolated supplies see Figures 10 and 11.
–V
ISOLATED
8
+V
ISOLATED
R
L
I
OUT
4-20mA
Offset
Adjust
4
ISO100
Calibration procedure:
1. Set V
IN
= 0V
2. Adjust R
2
for I
OUT
= 20mA
3. Set V
= –5V
4. Adjust R
IN
for I
OUT
= 4mA
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