This device consists of two independent lowpower voltage comparators designed specifically
to operate from a single supply over a wide range
of voltages. Operation from split power supplies is
also possible.
The input common-mode voltage range includes
the negative rail even though operated from a
single power supply voltage.
All the pins are protected against electrostatic
discharge up to 2 kV. As a consequence, the input
voltages must not exceed the magnitude of V
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
www.st.com
13
Schematic diagramLM2903W
1 Schematic diagram
Figure 1.Schematic diagram (1/2 LM2903W)
6##
.ONINVER TING
INPUT
)NVERTING
INPUT
!
6##6##
!!
6##6##
6##6##
6##
!
6O
2/13Doc ID 022662 Rev 1
LM2903WAbsolute maximum ratings and operating conditions
2 Absolute maximum ratings and operating conditions
Table 1.Absolute maximum ratings
SymbolParameterValueUnit
V
CC
V
id
V
in
V
out
R
thja
R
thjc
T
j
T
stg
ESD
1. Short-circuits from the output to V
maximum output current is approximately 20 mA, independent of the magnitude of V
2. Short-circuits can cause excessive heating and destructive dissipation. Values are typical.
3. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating.
4. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of
connected pin combinations while the other pins are floating.
5. Charged device model: all pins and the package are charged together to the specified voltage and then
discharged directly to the ground through only one pin. This is done for all pins.
Table 2.Operating conditions
Supply voltage ±18 to 36V
Differential input voltage
Input voltage
V
CC
-
-0.3 to V
+
+0.3V
CC
Output voltage36V
Output short-circuit to ground
Thermal resistance junction to ambient
SO-8
Thermal resistance junction to case
SO-8 40
(1)
(2)
(2)
Infinite
125
°C/W
°C/W
Maximum junction temperature+150°C
Storage temperature range-65 to +150°C
Human body model (HBM)
Machine model (MM)
CDM: charged device model
CC
(3)
(4)
(5)
+
can cause excessive heating and possible destruction. The
2000V
200V
1500V
+
.
CC
SymbolParameterValueUnit
V
T
icm
oper
Common mode input voltage range
≤ T
T
min
amb
≤ T
max
0 to V
0 to V
Operating free-air temperature range-40 to +125°C
CC
CC
+
-1.5
+
-2
V
Doc ID 022662 Rev 13/13
Electrical characteristicsLM2903W
3 Electrical characteristics
Table 3.V
CC
+
= 5 V, V
SymbolParameterMin.Typ.Max.Unit
V
I
I
A
Input offset voltage
io
≤ T
T
min
Input offset current
io
≤ T
T
min
Input bias current
ib
T
≤ T
min
Large signal voltage gain
vd
= 15 V, RL = 15 kΩ, Vo = 1 to 11 V
V
CC
amb
amb
amb
Supply current (all comparators)
I
V
V
I
I
sink
t
CC
id
OL
OH
res
= 5 V, no load
V
CC
= 30 V, no load
V
CC
Differential input voltage
Low level output voltage (Vid = -1 V, I
≤ T
T
min
amb
High level output current (V
≤ T
T
min
amb
≤ T
Output sink current (Vid = -1 V, Vo = 1.5 V)616mA
Small signal response time
Large signal response time
rel
TTL input (V
Output signal at 50% of final value
t
ref
Output signal at 95% of final value
1. At output switch point, VO ≈ 1.4 V, RS = 0 Ω with V
(0 V to V
2. 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 charge exists on the reference of input lines.
3. 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
–0.3 V (or 0.3 V below the negative power supply, if used).
4. The response time specified is for a 100 mV input step with 5 mV overdrive.
5. Maximum values are guaranteed by design and evaluation.
CC
+
–1.5 V).
-
≤ T
≤ T
≤ T
≤ T
max
= GND, T
CC
(1)
max
max
(2)
max
max
(3)
CC
(4)
(5)
= 25°C (unless otherwise specified)
amb
sink
= Vo = 30 V, Vid = 1 V)
(RL = 5.1 kΩ to V
= +1.4 V, RL = 5.1 kΩ to V
17
15
550
150
25250
400
25200V/mV
0.4
= 4 mA)
1
250400
V
2.5
CC
700
0.1
+
)1.3µs
CC
+
)
CC
500
+
from 5 V to 30 V, and over the full input common-mode range
CC
mV
nA
nA
1
+
mA
V
mV
nA
1
µA
ns
1
µs
4/13Doc ID 022662 Rev 1
LM2903WElectrical characteristics
Figure 2.Supply current vs. supply voltageFigure 3.Input current vs. supply voltage
Figure 4.Output saturation voltage vs.
output current
Figure 5.Response time for various input
overdrives - negative transition
Figure 6.Response time for various input
overdrives - positive transition
Doc ID 022662 Rev 15/13
Typical application schematicsLM2903W
4 Typical application schematics
Figure 7.Basic comparatorFigure 8.Driving CMOS
5 V
V
= 5 V
CC
100 kΩ
+V
-V
15 kΩ
+V
-V
(ref)
1/ 2
LM2903
(ref)
(ref)
(ref)
1/2
LM2903
V
O
Figure 9.Driving TTLFigure 10. Low frequency op-amp
5 V
5 V
15 k
1/2
LM2903
100 kΩ
AV = 100
0.5 μF
+V
-V
(ref)
(ref)
1/ 2
LM2903
10 kΩ
~
e
&
&
l
1 kΩ
&
Ω
e
o
Figure 11. Low frequency op-ampFigure 12. Transducer amplifier
5 V
(eo = 0 V for el = 0 V)
Magnetic pick-up
~
e
1 kΩ
15 kΩ
1/ 2
LM2903
l
0.5 μF
100 kΩ
2N 2222
e
o
AV = 100
6/13Doc ID 022662 Rev 1
10 kΩ
5 V
10 kΩ
1/ 2
LM2903
20 MΩ
3 kΩ
e
o
LM2903WTypical application schematics
Figure 13. Low frequency op- amp with offset
~
e
l
Figure 14. Zero crossing detector (single
adjust
5 V
Offset adjust
R
2
R
S
R
1
1 MΩ
100 kΩ
1 kΩ
1 MΩ
1/ 2
LM2903
100 kΩ
15 kΩ
0.5μF
R1
5 V
2N 2222
e
o
e
l
power supply)
5.1 kΩ
1N4148
100 kΩ
5.1 kΩ
10 kΩ
100 kΩ
1/ 2
LM2903
20 MΩ
5 V
5.1 kΩ
Figure 15. Limit comparatorFigure 16. Split-supply applications - zero
crossing detector
V
(12 V)
CC
15 V
V
high
2R
(ref)
e
I
S
R
S
~
1/ 2
LM2903
10 kΩ
Lamp
5.1 kΩ
1/2
e
~
I
LM2903
e
o
V
low
1/2
2R
(ref)
LM2903
S
2N 2222
15 V
Figure 17. Crystal controlled oscillatorFigure 18. Comparator with a negative
reference
V
= 15 V
CC
15 V
0.1 μF
200 kΩ
200 kΩ
100 kΩ
1/2
LM2903
f = 100 kHz
2 kΩ
V
CC
0
e
o
e
~
I
1/2
LM2903
5.1 kΩ
e
o
5 V
15 V
Doc ID 022662 Rev 17/13
Typical application schematicsLM2903W
Figure 19. Time delay generator
V
=+15V
C C
V
CC
0
t
Input gating signal
V
CC
V
3
V
V
2
C1
V
1
0
t
t
t
2
1
0
10 kΩ
15 kΩ
200 k
Ω
3 kΩ
10 MΩ
10 kΩ
1/2
V
3
LM2903
3 k
10 kΩ
1/2
LM2903
t
o
A
V
(ref.)
51 kΩ
V
C1
10 kΩ
V
2
10 MΩ
1/2
LM2903
V
CC
V
03
t
t
o
3
Ω
V
CC
V
O2
t
t
o
2
0.001μF
3 k
Ω
10 MΩ
51 kΩ
V
1
t
3
t
t
4
51 kΩ
10 kΩ
1/2
LM2903
V
V
CC
O1
t0t
1
Figure 20. Two-decade high-frequency VCO
V
CC
100 kΩ
Frequency control
voltage input
Vcontrol
10 kΩ
0.1 μF
20 kΩ
50 kΩ
V
=+30V
CC
+250 mV
700 Hzf100 kHz
V
o
control
8/13Doc ID 022662 Rev 1
20 kΩ
+50 V
1/ 2
LM2903
500 pF
1/ 2
LM2903
3 kΩ
0.01 μF
5.1 kΩ
V
CC
V
100 kΩ
CC
3 kΩ
1/ 2
LM2903
V
/2
CC
Output 1
Output 2
/2
LM2903WPackage information
5 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
Doc ID 022662 Rev 19/13
Package informationLM2903W
5.1 SO-8 package information
Figure 21. SO-8 package mechanical drawing
Table 4.SO-8 package mechanical data
Dimensions
Ref.
Min.Typ.Max.Min.Typ.Max.
A1.750.069
A10.100.250.0040.010
A21.250.049
b0.280.480.0110.019
c0.170.230.0070.010
D4.804.905.000.1890.1930.197
E5.806.006.200.2280.2360.244
E13.803.904.000.1500.1540.157
e1.270.050
h0.250.500.0100.020
L0.401.270.0160.050
L11.040.040
k1°8°1°8°
ccc0.100.004
MillimetersInches
10/13Doc ID 022662 Rev 1
LM2903WOrdering information
6 Ordering information
Table 5.Order codes
Order code
LM2903WDT
LM2903WYDT
1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening
according to AEC Q001 & Q 002 or equivalent are ongoing.
(1)
Temperature
range
-40°C to +125°C
PackagePackingMarking
SO-8Tape & reel2903W
SO-8
(Automotive grade)
Tape & reel2903WY
Doc ID 022662 Rev 111/13
Revision historyLM2903W
7 Revision history
Table 6.Document revision history
DateRevisionChanges
18-Jan-20121Initial release.
12/13Doc ID 022662 Rev 1
LM2903W
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