Datasheet

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2N2222
2N3708
R1
30 kΩ
(see Note A)
3.9 kΩ
1 kΩ
Output
to TTL
V
CC+
= 5 V
1N2175
2N3708
V
CC+
Inputs
TTL
Strobe
V
CC−
1 kΩ
BAL/STRB
See Note A
LM211-EP
DIFFERENTIAL COMPARATOR WITH STROBES
SLCS140A – DECEMBER 2002 – REVISED MAY 2006
APPLICATION INFORMATION (continued)
A. 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
A. Transient voltage and inductive kickback protection
Figure 27. Relay Driver With Strobe
15
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