HA17901 Datasheet, PDF (14/16 Pages) Hitachi Semiconductor – Quadruple Comparators

HA17901, HA17339 Series
20
16
V_CC = 15 V
12
8
4
0
0
5
10
15
Input Voltage V_IN (V)
Figure 10 Inverting Comparator I/O Transfer Characteristics
7. Zero-Cross Detector (Single-Voltage Power Supply)
In this circuit, the noninverting input will essentially beheld at the potential determined by dividing V_CC
with 100kΩ and 10kΩ resistors. When V_IN is 0V or higher, the output will be low, and when V_IN is
negative, Vout will invert to the high level. (See figure 11.)
V_CC
100k
5.1k
5.1k
Vin
1S2076
100k ^VCC
–
HA17901
+
5.1k
Vout
10k ^20M
Figure 11 Zero-Cross Detector
14