LM111, LM211, LM311
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007H − SEPTEMBER 1973 − REVISED AUGUST 2003
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
2N2222
Output
to TTL
†
R1
30 kΩ
†
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
TTL
BAL/STRB
2N3708
‡
V
CC−
Strobe
1 kΩ
‡
Transient voltage and inductive kickback protection
Figure 27. Relay Driver With Strobe
15
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