ha17901at Renesas Electronics Corporation., ha17901at Datasheet - Page 12

• Manufacturer Part Number: ha17901at
• Description: Quadruple Comparators
• Manufacturer: Renesas Electronics Corporation.

HA17901A Series
5. Noninverting Comparator (with Hysteresis)
Rev.1.00 Mar 10, 2006 page 12 of 15
Assuming +V
(approximately 0 V). If the voltage applied to +V
the noninverting input, +V
inverted to the low level once again when the value of the noninverting input, (Vout – V
lower than V
formula can be derived, i.e. +V
> 9.06 V.
When +V
hysteresis of 7.65 V. Figure 8 shows the input characteristics.
(Vout
(Assuming Vout = 15V)
IN
is lowered, the output will invert from high to low when +V
REF
V
IN
IN
. With the circuit constants shown in figure 7, assuming V
)
is 0 V, when V
Figure 8 Noninverting Comparator I/O Transfer Characteristics
R
1
R
+ R
1
2
IN
+ V
IN
IN
+V
R
20
16
12
+Vin
2
8
4
0
/(R
REF
Figure 7 Noninverting Comparator
10 M/(5.1 M + 10 M)
REF
6V
0
1
is applied to the inverting input, the output will go to the low level
+ R
2
), exceeds +V
5.1 M
R
Input Voltage V
1
IN
5
is gradually increased, the output will go high when the value of
V
+Vin = 0 to 10 V
CC
= 15 V, +V
HA17901A
+
V
REF
10 M
6 V, and Vout will invert from low to high when +V
CC
R
2
. Next, if +V
IN
REF
10
(V)
V
= 6 V
CC
3 k
CC
IN
Vout
= 15 V and +V
IN
1.41 V. Therefore this circuit has a
is gradually lowered, Vout will be
15
IN
)
REF
R
1
= 6 V, the following
/(R
1
+ R
2
), becomes
IN
is