HA17901 Datasheet, PDF (13/16 Pages) Hitachi Semiconductor – Quadruple Comparators

HA17901, HA17339 Series
+V_REF
+Vin
R₁
5.1M
V_CC
V_CC
–
HA17901
+
3k
Vout
10M
R₂
Figure 7 Noninverting Comparator
20
V_CC = 15 V, +V_REF = 6 V
+Vin = 0 to 10 V
16
12
8
4
0
0
5
10
15
Input Voltage V_IN (V)
Figure 8 Noninverting Comparator I/O Transfer Characteristics
6. Inverting Comparator (with Hysteresis)
In this circuit, the output Vout inverts from high to low when +V_IN > (V_CC + Vout)/3. Similarly, the
output Vout inverts from low to high when +V_IN < V_CC/3. With the circuit constants shown in figure 9,
assuming V_CC = 15V and Vout = 15V, this circuit will have a 5V hysteresis. Figure 10 shows the I/O
characteristics for the circuit in figure 9.
+Vin
1M
V_CC
V_CC
–
HA17901
+
V_CC
3k
Vout
1M ^1M
Figure 9 Inverting Comparator
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