LM2903N ON Semiconductor, LM2903N Datasheet - Page 5

• Manufacturer Part Number: LM2903N
• Description: Comparator ICs 2-36V Dual
• Manufacturer: ON Semiconductor

Specifications of LM2903N

• Number Of Channels: 2 Channels
• Output Type: Open Collector
• Response Time: 1.5 us
• Offset Voltage (max): 7 mV
• Input Bias Current (max): 250 nA
• Supply Voltage (max): 36 V
• Supply Voltage (min): 2 V
• Supply Current (max): 1 mA
• Maximum Power Dissipation: 570 mW
• Maximum Operating Temperature: + 105 C
• Mounting Style: Through Hole
• Package / Case: PDIP-8
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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