NCV2903VDR2G ON Semiconductor, NCV2903VDR2G Datasheet - Page 5

• Manufacturer Part Number: NCV2903VDR2G
• Description: Comparator ICs 150C LO PWR DUAL COMPARAT
• Manufacturer: ON Semiconductor

bandwidth characteristics. This gives the device oscillation
tendencies if the outputs are capacitively coupled to the
inputs via stray capacitance. This oscillation manifests
itself during output transitions (V
this situation, input resistors < 10 kW should be used.
Figure 10. Free−Running Square−Wave Oscillator
These dual comparators feature high gain, wide
V
D1 prevents input from going negative by more than 0.6 V.
in
V
CC
51 k
51 k
Figure 8. Zero Crossing Detector
8.2 k
R1
R1
D1
R3 ≤
0.001 mF
R5
10
6.8 k
220 k
R2
(Single Supply)
R4
for small error in zero crossing.
R1 + R2 = R3
1.0 mW
LM393
+
-
51 k
220 k
15 k
R5
V
R3
ref
*
)
LM393
V
R1
+15 V
V
CC
OL
10 m
O
0
R
S
to V
Figure 12. Comparator with Hysteresis
OH
V
R
10 k
t
10 k
CC
APPLICATIONS INFORMATION
L
). To alleviate
+
V
-
LM393
O
R2
http://onsemi.com
5
V
CC
recommended. It is good design practice to ground all
unused pins.
voltage without damaging the comparator’s inputs. Voltages
more negative than −0.3 V should not be used.
V
R
in
``ON'' for t ­ t
where:
L
The addition of positive feedback (< 10 mV) is also
Differential input voltages may be larger than supply
Dt = RC n (
t
R
V
V
V
LM393
+
-
Figure 11. Time Delay Generator
th1
th2
S
in(min)
= R1 | | R2
Figure 9. Zero Crossing Detector
= V
= V
O
+ Dt
ref
ref
[ 0.4 V peak for 1% phase distortion (DQ).
V
*
)
+V
LM393
-V
C
V
+
-
V
V
CC
ref
CC
EE
CC
R
)
C
(V
(V
(Split Supply)
R1 + R2 + R
CC
ref
-V
-V
R1 + R2
+ V
10 k
O
ref
-
LM393
+
ref
Low) R1
) R1
L
V
O
V
- V
V
t
in
0
0
C
0
O
V
V
V
EE
in
CC
O
V
V
ref
ref
V
CC
R
V
L
O
V
DQ
in(min)
t
Q
Q