LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
APPLICATION INFORMATION
V
CC+
= 15 V
1 MΩ
2 kΩ
TL081
10 kΩ
15 µF
+
Input
Output
–
+
V
CC–
= –15 V
Figure 25. Negative-Peak Detector
V
CC+
= 5 V
3.9 kΩ
1N2175
1 kΩ
2N3708
Output to TTL
†
R1
30 kΩ
2N2222
†
R1 sets the comparison level. At comparison, the photodiode has less than 5 mV across it
decreasing dark current by an order of magnitude.
Figure 26. Precision Photodiode Comparator
V
CC+
Inputs
BAL/STRB
2N3708
‡
V
CC–
TTL Strobe
1 kΩ
‡
Transient voltage and inductive kickback protection
Figure 27. Relay Driver With Strobe
14
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