LM393S, LM2903S
Low Offset Voltage
Dual Comparators
The LM393S and LM2903S are dual, independent, precision
voltage comparators capable of single or split supply operation. These
devices are designed to permit a common mode range to ground level
with single supply operation. Input offset voltage specifications as low
as 2.0 mV make this device an excellent selection for many
applications in consumer, automotive, and industrial electronics.
Features
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MARKING
DIAGRAMS
•
•
•
•
•
•
•
•
•
Wide Single−Supply Range: 2.0 Vdc to 36 Vdc
Split−Supply Range:
±1.0
Vdc to
±18
Vdc
Very Low Current Drain Independent of Supply Voltage: 0.4 mA
Low Input Bias Current: 25 nA
Low Input Offset Current: 5.0 nA
Low Input Offset Voltage: 5.0 mV (max) with LM393S
Input Common Mode Range to Ground Level
Differential Input Voltage Range Equal to Power Supply Voltage
Output Voltage Compatible with DTL, ECL, TTL, MOS, and CMOS
Logic Levels
•
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
V
CC
+ Input
- Input
Output
LM393SN
AWL
YYWWG
PDIP−8
N SUFFIX
CASE 626
LM2903SN
AWL
YYWWG
LMxxxx = Specific Device Code
A, AL
= Assembly Location
WL
= Wafer Lot
Y, YY
= Year
W, WW = Work Week
G or
G
= Pb−Free Package
R2
2.1 k
Q3
F1
R4
2.0 k
Q4
Q5
Q6
Q14
PIN CONNECTIONS
Output A
Inputs A
GND
1
2
3
4
8
−
+
7
V
CC
Output B
Inputs B
−
+
5
6
(Top View)
Q10
Q1
Q2
R1
4.6 k
Q11
Q8
Q9
Q12
Q15
Q16
ORDERING INFORMATION
See detailed marking information and ordering and shipping
information on page 7 of this data sheet.
Figure 1. Representative Schematic Diagram
(Diagram shown is for 1 comparator)
©
Semiconductor Components Industries, LLC, 2014
1
October, 2014 − Rev. 0
Publication Order Number:
LM393S/D
LM393S, LM2903S
MAXIMUM RATINGS
Rating
Power Supply Voltage
Input Differential Voltage
Input Common Mode Voltage Range (Note 1)
Output Voltage
Output Short Circuit−to−Ground
Output Sink Current (Note 2)
Power Dissipation @ T
A
= 25°C
Derate above 25°C
Operating Ambient Temperature Range
LM393S
LM2903S
Maximum Operating Junction Temperature
Storage Temperature Range
T
J(max)
T
stg
Symbol
V
CC
V
IDR
V
ICR
V
O
I
SC
I
Sink
P
D
1/R
qJA
T
A
0 to +70
−40 to +105
150
−65 to +150
°C
°C
Value
+36 or
±18
36
−0.3 to +36
36
Continuous
20
570
5.7
Unit
V
V
V
V
mA
MW
mW/°C
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. For supply voltages less than 36 V, the absolute maximum input voltage is equal to the supply voltage.
2. The maximum output current may be as high as 20 mA, independent of the magnitude of V
CC
, output short circuits to V
CC
can cause
excessive heating and eventual destruction.
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LM393S, LM2903S
ELECTRICAL CHARACTERISTICS
(V
CC
= 5.0 Vdc, T
low
≤
T
A
≤
T
high
, unless otherwise noted.)
LM393S
Characteristic
Input Offset Voltage (Note 3)
T
A
= 25°C
T
low
≤
T
A
≤
T
high
Input Offset Current
T
A
= 25°C
T
low
≤
T
A
≤
T
high
Input Bias Current (Note 4)
T
A
= 25°C
T
low
≤
T
A
≤
T
high
Input Common Mode Voltage Range (Note 5)
T
A
= 25°C
T
low
≤
T
A
≤
T
high
Voltage Gain
R
L
≥
15 kW, V
CC
= 15 Vdc, T
A
= 25°C
Large Signal Response Time
V
in
= TTL Logic Swing, V
ref
= 1.4 Vdc
V
RL
= 5.0 Vdc, R
L
= 5.1 kW, T
A
= 25°C
Response Time (Note 6)
V
RL
= 5.0 Vdc, R
L
= 5.1 kW, T
A
= 25°C
Input Differential Voltage (Note 7)
All V
in
≥
GND or V− Supply (if used)
Output Sink Current
V
in
≥
1.0 Vdc, V
in+
= 0 Vdc, V
O
≤
1.5 Vdc T
A
= 25°C
Output Saturation Voltage
V
in
≥
1.0 Vdc, V
in+
= 0, I
Sink
≤
4.0 mA, T
A
= 25°C
T
low
≤
T
A
≤
T
high
Output Leakage Current
V
in−
= 0 V, V
in+
≥
1.0 Vdc, V
O
= 5.0 Vdc, T
A
= 25°C
V
in−
= 0 V, V
in+
≥
1.0 Vdc, V
O
= 30 Vdc,
T
low
≤
T
A
≤
T
high
Supply Current
R
L
=
∞
Both Comparators, T
A
= 25°C
R
L
=
∞
Both Comparators, V
CC
= 30 V
I
CC
−
−
0.6
0.75
1.0
2.5
−
−
0.6
0.75
1.0
2.5
I
OL
−
−
0.1
−
−
1000
−
−
0.1
−
−
1000
mA
V
OL
−
−
150
−
400
700
−
−
−
200
400
700
nA
mV
I
Sink
6.0
16
−
6.0
16
−
mA
V
ID
−
−
V
CC
−
−
V
CC
V
t
TLH
−
1.0
−
−
1.0
−
ms
−
−
200
−
−
200
−
ns
A
VOL
V
ICR
0
0
50
−
−
200
V
CC
−1.5
V
CC
−2.0
−
0
0
25
−
−
200
V
CC
−1.5
V
CC
−2.0
−
V/mV
I
IB
−
−
25
−
250
400
−
−
25
200
250
500
V
I
IO
−
−
±5.0
−
±50
±150
−
−
±5.0
±50
±50
±200
nA
Symbol
V
IO
−
−
±1.0
−
±5.0
±9.0
−
−
±2.0
±9.0
±7.0
±15
nA
Min
Typ
Max
Min
LM2903S
Typ
Max
Unit
mV
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
LM393S T
low
= 0°C, T
high
= +70°C
LM2903S T
low
= −40°C, T
high
= +105°C
3. At output switch point, V
O
]1.4
Vdc, R
S
= 0
W
with V
CC
from 5.0 Vdc to 30 Vdc, and over the full input common mode range
(0 V to V
CC
= −1.5 V).
4. Due to the PNP transistor inputs, bias current will flow out of the inputs. This current is essentially constant, independent of the output state,
therefore, no loading changes will exist on the input lines.
5. Input common mode of either input should not be permitted to go more than 0.3 V negative of ground or minus supply. The upper limit of
common mode range is V
CC
−1.5 V.
6. Response time is specified with a 100 mV step and 5.0 mV of overdrive. With larger magnitudes of overdrive faster response times are
obtainable.
7. The comparator will exhibit proper output state if one of the inputs becomes greater than V
CC
, the other input must remain within the common
mode range. The low input state must not be less than −0.3 V of ground or minus supply.
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LM393S, LM2903S
APPLICATIONS INFORMATION
These dual comparators feature high gain, wide
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
OL
to V
OH
). To alleviate
this situation, input resistors < 10 kW should be used.
+15 V
R4
220 k
6.8 k
R2
R5
220 k
*
LM393S
The addition of positive feedback (< 10 mV) is also
recommended. It is good design practice to ground all
unused pins.
Differential input voltages may be larger than supply
voltage without damaging the comparator’s inputs. Voltages
more negative than −0.3 V should not be used.
R1
8.2 k
V
in
R1
D1
10 k
+V
CC
*
10 k
V
in
V
in(min)
)
Q
15 k
R3
10 m
V
in
LM393S
)
-V
EE
V
CC
V
O
- V
EE
DQ
Q
D1 prevents input from going negative by more than 0.6 V.
R1 + R2 = R3
R3
≤
R5
for small error in zero crossing.
10
V
in(min)
[
0.4 V peak for 1% phase distortion (DQ).
Figure 2. Zero Crossing Detector
(Single Supply)
Figure 3. Zero Crossing Detector
(Split Supply)
V
CC
V
CC
R
+
-
LM393S
LM393S
1.0 mW
V
CC
R
L
10 k
V
O
t
R
L
-
V
CC
51 k
0.001
mF
LM393S
-
V
C
C
+
+ V
ref
V
O
+
``ON'' for t
t
O
+
Dt
where:
V
ref
)
Dt
= RC n (
V
CC
V
in
0
V
O
0
V
C
0
t
O
V
ref
51 k
51 k
V
CC
V
O
0
t
V
ref
t
Figure 4. Free−Running Square−Wave Oscillator
V
CC
Figure 5. Time Delay Generator
R
S
= R1 | | R2
R
S
-
LM393S
R
L
V
th1
= V
ref
+
(V
CC
-V
ref
) R1
R1 + R2 + R
L
(V
ref
-V
O
Low) R1
R1 + R2
+
V
ref
R1
R2
V
th2
= V
ref
-
Figure 6. Comparator with Hysteresis
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LM393S, LM2903S
ORDERING INFORMATION
Device
LM393SNG
LM2903SNG
Operating Temperature Range
0°C to +70°C
−40°C to +105°C
Package
PDIP−8
(Pb−Free)
PDIP−8
(Pb−Free)
Shipping
†
50 Units / Rail
50 Units / Rail
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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