LM193/LM293/LM393/LM2903
Low Power Low Offset Voltage Dual Comparators
General Description
The LM193 series consists of two independent precision
voltage comparators with an offset voltage specification as
low as 2.0 mV max for two comparators which were de-
signed specifically to operate from a single power supply
over a wide range of voltages. Operation from split power
supplies is also possible and the low power supply current
drain is independent of the magnitude of the power supply
voltage. These comparators also have a unique characteris-
tic in that the input common-mode voltage range includes
ground, even though operated from a single power supply
voltage.
Application areas include limit comparators, simple analog to
digital converters; pulse, squarewave and time delay gen-
erators; wide range VCO; MOS clock timers; multivibrators
and high voltage digital logic gates. The LM193 series was
designed to directly interface with TTL and CMOS. When
operated from both plus and minus power supplies, the
LM193 series will directly interface with MOS logic where
their low power drain is a distinct advantage over standard
comparators.
The LM393 and LM2903 parts are available in National's
innovative thin micro SMD package with 8 (12 mil) large
bumps.
Advantages
n
High precision comparators
n
Reduced V
OS
drift over temperature
n
Eliminates need for dual supplies
n
Allows sensing near ground
n
Compatible with all forms of logic
n
Power drain suitable for battery operation
Features
n
Wide supply
-- Voltage range:
2.0V to 36V
-- Single or dual supplies:
1.0V to
18V
n
Very low supply current drain (0.4 mA) -- independent
of supply voltage
n
Low input biasing current:
25 nA
n
Low input offset current:
5 nA
n
Maximum offset voltage:
3 mV
n
Input common-mode voltage range includes ground
n
Differential input voltage range equal to the power
supply voltage
n
Low output saturation voltage,:
250 mV at 4 mA
n
Output voltage compatible with TTL, DTL, ECL, MOS
and CMOS logic systems
n
Available in the 8-Bump (12 mil) micro SMD package
n
See AN-1112 for micro SMD considerations
Squarewave Oscillator
Non-Inverting Comparator with Hysteresis
00570938
00570909
August 2002
LM193/LM293/LM393/LM2903
Low
Power
Low
Offset
V
oltage
Dual
Comparators
2002 National Semiconductor Corporation
DS005709
www.national.com
Schematic and Connection Diagrams
00570902
Metal Can Package
Dual-In-Line/SOIC Package
00570903
00570901
micro SMD
micro SMD Marking
00570945
Top View
00570946
Top View
LM193/LM293/LM393/LM2903
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2
Absolute Maximum Ratings
(Note 10)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage, V
+
36V
Differential Input Voltage (Note 8)
36V
Input Voltage
-0.3V to +36V
Input Current (V
IN
<
-0.3V) (Note 3)
50 mA
Power Dissipation (Note 1)
Molded DIP
780 mW
Metal Can
660 mW
Small Outline Package
510 mW
micro SMD Pacakge
568mW
Output Short-Circuit to Ground
(Note 2)
Continuous
Operating Temperature Range
LM393
0C to +70C
LM293
-25C to +85C
LM193/LM193A
-55C to +125C
LM2903
-40C to +85C
Storage Temperature Range
-65C to +150C
Lead Temperature
(Soldering, 10 seconds)
+260C
Soldering Information
Dual-In-Line Package
Soldering (10 seconds)
260C
Small Outline Package
215C
Vapor Phase (60 seconds)
Infrared (15 seconds)
220C
See AN-450 "Surface Mounting Methods and Their Effect
on Product Reliability" for other methods of soldering
surface mount devices.
ESD rating
(1.5 k
in series with 100 pF)
1300V
Electrical Characteristics
(V
+
=5V, T
A
= 25C, unless otherwise stated)
Parameter
Conditions
LM193A
Units
Min
Typ
Max
Input Offset Voltage
(Note 9)
1.0
2.0
mV
Input Bias Current
I
IN
(+) or I
IN
(-) with Output In Linear
25
100
nA
Range, V
CM
= 0V (Note 5)
Input Offset Current
I
IN
(+)-I
IN
(-) V
CM
= 0V
3.0
25
nA
Input Common Mode
V+ = 30V (Note 6)
0
V
+
-1.5
V
Voltage Range
Supply Current
R
L
=
V
+
=5V
0.4
1
mA
V
+
=36V
1
2.5
mA
Voltage Gain
R
L
15 k, V
+
=15V
50
200
V/mV
V
O
= 1V to 11V
Large Signal Response
V
IN
=TTL Logic Swing, V
REF
=1.4V
300
ns
Time
V
RL
=5V, R
L
=5.1 k
Response Time
V
RL
=5V, R
L
=5.1 k
(Note 7)
1.3
s
Output Sink Current
V
IN
(-)=1V, V
IN
(+)=0, V
O
1.5V
6.0
16
mA
Saturation Voltage
V
IN
(-)=1V, V
IN
(+)=0, I
SINK
4 mA
250
400
mV
Output Leakage Current
V
IN
(-)=0, V
IN
(+)=1V, V
O
=5V
0.1
nA
Electrical Characteristics
(V
+
=5V, T
A
= 25C, unless otherwise stated)
Parameter
Conditions
LM193
LM293, LM393
LM2903
Units
Min Typ
Max
Min Typ
Max
Min Typ
Max
Input Offset Voltage
(Note 9)
1.0
5.0
1.0
5.0
2.0
7.0
mV
Input Bias Current
I
IN
(+) or I
IN
(-) with Output In
25
100
25
250
25
250
nA
Linear Range, V
CM
= 0V (Note 5)
Input Offset Current
I
IN
(+)-I
IN
(-) V
CM
= 0V
3.0
25
5.0
50
5.0
50
nA
Input Common Mode
V+ = 30V (Note 6)
0
V+-1.5
0
V+-1.5
0
V+-1.5
V
Voltage Range
LM193/LM293/LM393/LM2903
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3
Electrical Characteristics
(Continued)
(V
+
=5V, T
A
= 25C, unless otherwise stated)
Parameter
Conditions
LM193
LM293, LM393
LM2903
Units
Min Typ
Max
Min Typ
Max
Min Typ
Max
Supply Current
R
L
=
V
+
=5V
0.4
1
0.4
1
0.4
1.0
mA
V
+
=36V
1
2.5
1
2.5
1
2.5
mA
Voltage Gain
R
L
15 k, V
+
=15V
50
200
50
200
25
100
V/mV
V
O
= 1V to 11V
Large Signal Response
V
IN
=TTL Logic Swing, V
REF
=1.4V
300
300
300
ns
Time
V
RL
=5V, R
L
=5.1 k
Response Time
V
RL
=5V, R
L
=5.1 k
(Note 7)
1.3
1.3
1.5
s
Output Sink Current
V
IN
(-)=1V, V
IN
(+)=0, V
O
1.5V
6.0
16
6.0
16
6.0
16
mA
Saturation Voltage
V
IN
(-)=1V, V
IN
(+)=0, I
SINK
4 mA
250
400
250
400
250
400
mV
Output Leakage Current
V
IN
(-)=0, V
IN
(+)=1V, V
O
=5V
0.1
0.1
0.1
nA
Electrical Characteristics
(V+ = 5V) (Note 4)
Parameter
Conditions
LM193A
Units
Min
Typ
Max
Input Offset Voltage
(Note 9)
4.0
mV
Input Offset Current
I
IN(+)
-I
IN(-)
, V
CM
=0V
100
nA
Input Bias Current
I
IN
(+) or I
IN
(-) with Output in Linear Range,
300
nA
V
CM
=0V (Note 5)
Input Common Mode
Voltage Range
V
+
=30V (Note 6)
0
V
+
-2.0
V
Saturation Voltage
V
IN
(-)=1V, V
IN
(+)=0, I
SINK
4 mA
700
mV
Output Leakage Current
V
IN
(-)=0, V
IN(+)
=1V, V
O
=30V
1.0
A
Differential Input Voltage
Keep All V
IN
's
0V (or V
-
, if Used), (Note 8)
36
V
Electrical Characteristics
(V+ = 5V) (Note 4)
Parameter
Conditions
LM193
LM293, LM393
LM2903
Units
Min Typ
Max
Min Typ
Max
Min Typ
Max
Input Offset Voltage
(Note 9)
9
9
9
15
mV
Input Offset Current
I
IN(+)
-I
IN(-)
, V
CM
=0V
100
150
50
200
nA
Input Bias Current
I
IN
(+) or I
IN
(-) with Output in
Linear Range, V
CM
=0V
(Note 5)
300
400
200
500
nA
Input Common Mode
Voltage Range
V
+
=30V (Note 6)
0
V
+
-2.0
0
V
+
-2.0
0
V
+
-2.0
V
Saturation Voltage
V
IN
(-)=1V, V
IN
(+)=0,
I
SINK
4 mA
700
700
400
700
mV
Output Leakage Current
V
IN
(-)=0, V
IN(+)
=1V, V
O
=30V
1.0
1.0
1.0
A
Differential Input Voltage
Keep All V
IN
's
0V (or V
-
, if
Used), (Note 8)
36
36
36
V
Note 1: For operating at high temperatures, the LM393 and LM2903 must be derated based on a 125C maximum junction temperature and a thermal resistance
of 170C/W which applies for the device soldered in a printed circuit board, operating in a still air ambient. The LM193/LM193A/LM293 must be derated based on
a 150C maximum junction temperature. The low bias dissipation and the "ON-OFF" characteristic of the outputs keeps the chip dissipation very small (P
D
100 mW),
provided the output transistors are allowed to saturate.
Note 2: Short circuits from the output to V
+
can cause excessive heating and eventual destruction. When considering short circuits to ground, the maximum output
current is approximately 20 mA independent of the magnitude of V
+
.
Note 3: This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP
transistors becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action
LM193/LM293/LM393/LM2903
www.national.com
4
Electrical Characteristics
(Continued)
on the IC chip. This transistor action can cause the output voltages of the comparators to go to the V
+
voltage level (or to ground for a large overdrive) for the time
duration that an input is driven negative. This is not destructive and normal output states will re-establish when the input voltage, which was negative, again returns
to a value greater than -0.3V.
Note 4: These specifications are limited to -55C
T
A
+125C, for the LM193/LM193A. With the LM293 all temperature specifications are limited to
-25C
T
A
+85C and the LM393 temperature specifications are limited to 0CT
A
+70C. The LM2903 is limited to -40CT
A
+85C.
Note 5: The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the output so
no loading change exists on the reference or input lines.
Note 6: The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3V. The upper end of the common-mode
voltage range is V
+
-1.5V at 25C, but either or both inputs can go to 36V without damage, independent of the magnitude of V
+
.
Note 7: The response time specified is for a 100 mV input step with 5 mV overdrive. For larger overdrive signals 300 ns can be obtained, see typical performance
characteristics section.
Note 8: Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the common-mode range, the
comparator will provide a proper output state. The low input voltage state must not be less than -0.3V (or 0.3V below the magnitude of the negative power supply,
if used).
Note 9: At output switch point, V
O
.1.4V, R
S
=0
with V
+
from 5V to 30V; and over the full input common-mode range (0V to V
+
-1.5V), at 25C.
Note 10: Refer to RETS193AX for LM193AH military specifications and to RETS193X for LM193H military specifications.
Ordering Information
Package
Temperature Range
Part Number
NSC Drawing
8-Pin Metal Can
-55C to 125C
LM193H
*
H08C
LM193H/883
LM193H-MLS
LM193AH-MLS
LM193AH-QMLV
**
LM193AH
LM193AH/883
-25C to 85C
LM293H
0C to 70C
LM393H
8-Pin Ceramic DIP
-55C to 125C
LM193J/883
*
J08A
LM193AJ/883
LM193AJ-QMLV
**
LM193AJ-MLS
8-Pin Molded DIP
0C to 70C
LM393N
N08E
-40C to 85C
LM2903N
8-Pin SOIC
0C to 70C
LM393M
M08A
LM393MX
-40C to 85C
LM2903M
LM2903MX
8-Bump (12 mils)
micro SMD
0C to 70C
LM393TL
TLA08AAA
LM393TLX
-40C to 85C
LM2903ITL
LM2903ITLX
Note: * Also available per LM38510/11202
Note: ** See STD Mil DWG 5962-94526
LM193/LM293/LM393/LM2903
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