www.fairchildsemi.com
LM2903,LM393/LM393A,LM293A
Dual Differential Comparator
Features
•
•
•
•
•
•
•
•
Single Supply Operation: 2V to 36V
Dual Supply Operation:
1V
to
18V
Allow Comparison of Voltages Near Ground Potential
Low Current Drain 800A Typ.
Compatible with all Forms of Logic
Low Input Bias Current 25nA Typ.
Low Input Offset Current
5nA
Typ.
Low Offset Voltage
1mV
Typ.
Description
The LM2903, LM393/LM393A, LM293A consist of two
independent voltage comparators designed to operate from a
single power supply over a wide voltage range.
8-DIP
1
8-SOIC
1
Internal Block Diagram
OUTPUT1
1
8
V
CC
IN1 (-)
2
-
+
7
OUTPUT2
6
IN2 (-)
IN1 (+)
3
-
+
GND
4
5
IN2 (+)
Rev. 2.0.2
©2012 Fairchild Semiconductor Corporation
LM2903,LM393/LM393A,LM293A
Schematic Diagram
V
CC
Q9
Q12
Q14
D3
D2
Q2
D1
Q3
D4
R2
IN (+)
IN (-)
Q1
Q4
OUTPUT
Q8
Q13
Q7
Q5
Q6
R1
D6
D5
GND
Absolute Maximum Ratings
Parameter
Power Supply Voltage
Differential Input Voltage
Input Voltage
Output Short Circuit to GND
Power Dissipation, T
a
= 25C
8-DIP
8-SOIC
Operating Temperature
LM393/LM393A
LM2903
LM293A
Storage Temperature
Symbol
V
CC
V
I(DIFF)
V
I
-
P
D
Value
18
or 36
36
-0.3 to +36
Continuous
1040
480
0 ~ +70
-40 ~ +105
-25 ~ +85
-65 ~ +150
Unit
V
V
V
-
mW
T
OPR
T
STG
C
C
Thermal Data
Parameter
Thermal Resistance Junction-Ambient Max.
8-DIP
8-SOIC
Symbol
R
ja
Value
120
260
Unit
C/W
2
LM2903,LM393/LM393A,LM293A
Electrical Characteristics
(V
CC
= 5V, T
A
= 25C, unless otherwise specified)
Parameter
Input Offset
Voltage
Input Offset Current
Input Bias Current
Input Common
Mode
Voltage Range
Supply Current
Voltage Gain
Large Signal
Response Time
Response Time
Output Sink Current
Output Saturation
Voltage
Output Leakage
Current
Symbol
V
IO
I
IO
I
BIAS
Conditions
V
O(P)
=1.4V, R
S
= 0
V
CM
= 0 to 1.5V Note1
Note1
Note1
LM293A/LM393A
Min.
-
-
-
-
-
-
0
Note1
I
CC
G
V
T
LRES
T
RES
I
SINK
V
SAT
I
O(LKG)
R
L
=
V
CC
= 5V
R
L
=
,
V
CC
= 30V
V
CC
=15V, R
L
15k
(for large V
O(P-P)swing
)
V
I
=TTL Logic Swing
V
REF
=1.4V, V
RL
= 5V,
R
L
= 5.1k
V
RL
=5V, R
L
=5.1k
V
I(-)
1V,
V
I(+)
=0V,
V
O(P)
1.5V
V
I(-)
1V,
VI(+) = 0V
I
SINK
= 4mA
V
I(-)
= 0V,
V
I(+)
= 1V
Note1
V
O(P)
= 5V
V
O(P)
= 30V
0
-
-
50
-
-
6
-
-
-
-
Typ.
1
-
5
-
65
-
-
-
0.6
0.8
200
350
1.4
18
160
-
0.1
-
Max.
2
4.0
50
150
250
400
V
CC
-1.5
V
CC
-2
1
2.5
-
-
-
-
400
700
-
1.0
Min.
-
-
-
-
-
-
0
0
-
-
50
-
-
6
-
-
-
-
LM393
Typ.
1
-
5
-
65
-
-
-
0.6
0.8
200
350
1.4
18
160
-
0.1
-
Max.
5
9.0
50
150
250
400
V
CC
-1.5
V
CC
-2
1
2.5
-
-
-
-
400
700
-
1.0
mA
V/mV
nS
S
mA
mV
nA
A
Unit
mV
nA
nA
V
I(R)
V
Note1
LM393/LM393A: 0
T
A
+70C
LM2903: -40
T
A
+105C
LM293A : -25
T
A
+85C
3
LM2903,LM393/LM393A,LM293A
Electrical Characteristics
(Continued)
(V
CC
= 5V, T
A
= 25C, unless otherwise specified)
Parameter
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Common Mode
Voltage Range
Supply Current
Voltage Gain
Large Signal Response Time
Response Time
Output Sink Current
Output Saturation Voltage
Output Leakage Current
Note1
LM393/LM393A: 0
T
A
+70C
LM2903: -40
T
A
+105C
LM293A : -25
T
A
+85C
Symbol
V
IO
I
IO
I
BIAS
Conditions
V
O(P)
=1.4V, R
S
= 0
V
CM
= 0 to 1.5V
Note1
Note1
Note1
LM2903
Min.
-
-
-
-
-
-
0
Typ.
1
9
5
50
65
-
-
-
0.6
1
100
350
1.5
16
160
-
0.1
-
Max.
7
15
50
200
250
500
V
CC
-1.5
V
CC
-2
1
2.5
-
-
-
-
400
700
-
1.0
Unit
mV
nA
nA
V
I(R)
Note1
I
CC
G
V
T
LRES
T
RES
I
SINK
V
SAT
I
O(LKG)
R
L
=
,
V
CC
= 5V
R
L
=
,
V
CC
= 30V
V
CC
=15V, R
L
15k
(for large V
O(P-P)swing
)
V
I
=TTL Logic Swing
V
REF
=1.4V, V
RL
= 5V, R
L
= 5.1k
V
RL
= 5V, R
L
= 5.1k
V
I(-)
1V,
V
I(+)
= 0V, V
O(P)
1.5V
V
I(-)
1V,
VI(+) = 0V
I
SINK
= 4mA
V
I(-)
= 0V,
V
I(+)
= 1V
Note1
V
O(P)
= 5V
V
O(P)
= 30V
V
0
-
-
25
-
-
6
-
-
-
-
mA
V/mV
nS
S
mA
mV
nA
A
4
LM2903,LM393/LM393A,LM293A
Typical Performance Characteristics
Figure 1. Supply Current vs Supply Voltage
Figure 2. Input Current vs Supply Voltage
Figure 3. Output Saturation Voltage vs Sink Current
Figure 4. Response Time for Various Input
Overdrive-Negative Transition
Figure 5. Response Time for Various Input
Overdrive-Positive Transition
5
