www.ti.com

2N2222

2N3708

R1

30 k

Ω

(see Note A)

3.9 k

Ω

1 k

Ω

Output

to TTL

1N2175

2N3708

Inputs

TTL

Strobe

1 k

Ω

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

Submit Documentation Feedback