+15V
–15V
16
4
RCV420
92kΩ
300kΩ
99kΩ
1
12
15
14
10
11
VOUT
0–5V
75Ω
11.5kΩ
2
10.0V
75Ω
1.01kΩ
100kΩ
10.0V
Reference
1.27kΩ
3
300kΩ
+5V
13
5
10kΩ
+15V
8
4
8
10kΩ
10kΩ
1MΩ
2
5
7
6
10kΩ
10kΩ
AT&T
LH1191
Solid-State
Relay
555
Timer
6.95V
LM193
1µF
0.01µF
3
1
0.57V
470Ω
47kΩ
4–20mA
Input
22.9kΩ
604Ω
4
2N3904
1µF
Overrange
Output
Underrange
Output
See Application Bulletin AB-014 for more details.
FIGURE 14. 4-20mA Current Loop Receiver with Input Overload Protection.
+15V
–15V
16
4
RCV420
1
2
12
300kΩ
99kΩ
92kΩ
15
14
301Ω
301Ω
75Ω
75Ω
VO
0-5V
11.5kΩ
0-20mA
Input
10
11
1.01kΩ
10.0V
Ref
3
300kΩ
100kΩ
13
5
See Application Bulletin AB-018 for more details.
FIGURE 15. 0-20mA/0-5V Receiver Using RCV420.
®
10
RCV420
BB [ BURR-BROWN CORPORATION ]
