This is information on a product in full production.
December 2012 Doc ID 2470 Rev 10 1/18
18
LM2903
Low-power dual voltage comparator
Datasheet − production data
Features
■Wide single supply voltage range or dual
supplies +2 V to +36 V or ±1 V to ±18 V
■Very low supply current (0.4 mA) independent
of supply voltage (1 mW/comparator at +5 V)
■Low input bias current: 25 nA typ.
■Low input offset current: ±5 nA typ.
■Input common-mode voltage range includes
negative rail
■Low output saturation voltage:
250 mV typ. (IO = 4 mA)
■Differential input voltage range equal to the
supply voltage
■TTL, DTL, ECL, MOS, CMOS compatible
outputs
■Automotive qualification
Description
This device consists of two independent low-
power 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 device also has a unique characteristic in that
the input common-mode voltage range includes
the negative rail even though operated from a
single power supply voltage.
N
DIP8
(Plastic package)
D
SO-8
(Plastic micropackage)
P
TSSOP8
(Thin shrink small outline package)
DFN8 2x2 mm
(Plastic micropackage)
www.st.com
Contents LM2903
2/18 Doc ID 2470 Rev 10
Contents
1 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Package pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5 Typical application schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1 DIP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.3 TSSOP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.4 DFN8 2x2 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
LM2903 Schematic diagram
Doc ID 2470 Rev 10 3/18
1 Schematic diagram
Figure 1. Schematic diagram (1/2 LM2903)
2 Package pin connections
Figure 2. Pin connections for each package (top view)
3.5 μA100 μA3.5 μA 100 μA
Non-inverting
input
Inverting
input
6##
).
/54
6## ).

/54
).
).
DIP8 / SO-8 / TSSOP8 / DFN8
Absolute maximum ratings and operating conditions LM2903
4/18 Doc ID 2470 Rev 10
3 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings
Symbol Parameter Value Unit
VCC Supply voltage ±18 or 36
VVid Differential input voltage ±36
Vin Input voltage -0.3 to +36
Output short-circuit to ground (1)
1. Short-circuits from the output to VCC+ can cause excessive heating and possible destruction. The
maximum output current is approximately 20 mA, independent of the magnitude of VCC+.
Infinite
Rthja
Thermal resistance junction to ambient(2)
DIP8
SO-8
TSSOP8
DFN8 2x2 mm
2. Short-circuits can cause excessive heating and destructive dissipation. Values are typical.
85
125
120
57 °C/W
Rthjc
Thermal resistance junction to case(2)
DIP8
SO-8
TSSOP8
41
40
37
TjMaximum junction temperature +150 °C
Tstg Storage temperature range -65 to +150
ESD
Human body model (HBM)(3)
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.
800 V
Machine model (MM)(4)
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.
200
CDM: charged device model(5)
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.
1.5 kV
Table 2. Operating conditions
Symbol Parameter Value Unit
Vicm
Common mode input voltage range
Tmin ≤ Tamb ≤ Tmax
0 to VCC+ -1.5
0 to VCC+ -2 V
Toper Operating free-air temperature range -40 to +125 °C
LM2903 Electrical characteristics
Doc ID 2470 Rev 10 5/18
4 Electrical characteristics
Table 3. VCC+ = 5 V, VCC- = GND, Tamb = 25°C (unless otherwise specified)
Symbol Parameter Min. Typ. Max. Unit
Vio
Input offset voltage(1)
Tmin ≤ Tamb ≤ Tmax
17
15 mV
Iio
Input offset current
Tmin ≤ Tamb ≤ Tmax
550
150 nA
Iib
Input bias current(2)
Tmin ≤ Tamb ≤ Tmax
25 250
400
Avd
Large signal voltage gain
VCC = 15 V, RL= 15 kΩ, Vo= 1 to 11 V 25 200 V/mV
ICC
Supply current (all comparators)
VCC = 5 V, no load
VCC = 30 V, no load
0.4
1
1
2.5
mA
Vid Differential input voltage(3) VCC+V
VOL
Low level output voltage (Vid = -1 V, Isink = 4 mA)
Tmin ≤ Tamb ≤ Tmax
250 400
700 mV
IOH
High level output current (VCC =Vo = 30 V, Vid = 1 V)
Tmin ≤ Tamb ≤ Tmax
0.1
1
nA
µA
Isink Output sink current (Vid = -1 V, Vo = 1.5 V) 6 16 mA
tres Small signal response time(4) (RL = 5.1 kΩ to VCC+)1.3µs
trel
Large signal response time(5)
TTL input (Vref = +1.4 V, RL= 5.1 kΩ to VCC+)
Output signal at 50 % of final value
Output signal at 95 % of final value
500
1
ns
µs
1. At output switch point, VO ≈ 1.4 V, RS = 0 Ω with VCC+ from 5 V to 30 V, and over the full input common-mode range
(0 V to VCC+ –1.5 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 provides 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.
Electrical characteristics LM2903
6/18 Doc ID 2470 Rev 10
Figure 3. Supply current vs. supply voltage Figure 4. Input current vs. supply voltage
Figure 5. Output saturation voltage vs.
output current
Figure 6. Response time for various input
overdrives - negative transition
Figure 7. Response time for various input
overdrives - positive transition
LM2903 Typical application schematics
Doc ID 2470 Rev 10 7/18
5 Typical application schematics
Figure 8. Basic comparator Figure 9. Driving CMOS
VCC = 5 V
15 kΩ
VO
+V(ref)
1/2
LM2903
-V(ref)
5 V
100 kΩ
&
1/ 2
LM2903
+V(ref)
-V(ref)
Figure 10. Driving TTL Figure 11. Low frequency op-amp
5 V
10 kΩ
+V(ref)
&
&
1/ 2
LM2903
-V(ref)
5 V
15 k
Ω
eo
0.5
μ
F
100 kΩ
el
1 kΩ
~
1/2
LM2903
AV = 100
Figure 12. Low frequency op-amp with boost Figure 13. Transducer amplifier
5 V
15 kΩ
0.5 μF
100 kΩ
1 kΩ
~
2N 2222
(eo = 0 V for el = 0 V)
1/ 2
LM2903
eo
el
AV = 100
5 V
10 kΩ
eo
20 MΩ
3 kΩ
Magnetic pick-up
10 kΩ
1/ 2
LM2903
Typical application schematics LM2903
8/18 Doc ID 2470 Rev 10
Figure 14. Low frequency op- amp with offset
adjust
Figure 15. Zero crossing detector
(single power supply)
100 kΩ
10 kΩ
el
20 MΩ
5 V
1N4148
5.1 kΩ
5.1 kΩ
100 kΩ
1/ 2
LM2903
5.1 kΩ
Figure 16. Limit comparator Figure 17. Split-supply applications - zero
crossing detector
10 kΩ
e
I
~
R
S
2R
S
V
(ref)
high
V
(ref)
low
2N 2222
V
CC
Lamp
1/ 2
LM2903
1/2
LM2903
2R
S
(12 V)
15 V
5.1 kΩ
eo
eI~
15 V
1/2
LM2903
Figure 18. Crystal controlled oscillator Figure 19. Comparator with a negative
reference
2 kΩ
200 kΩ
e
o
V
CC
0
100 kΩ
200 kΩ
1/2
LM2903
0.1 μF
f = 100 kHz
V
CC
= 15 V
15 V
5.1 kΩ
eo
eI~
15 V
5 V
1/2
LM2903
LM2903 Typical application schematics
Doc ID 2470 Rev 10 9/18
Figure 20. Time delay generator
Figure 21. Two-decade high-frequency VCO
VCC
0
V(ref.)
10 kΩ
1/2
15 kΩ
200 k
Ω
3 kΩ
3 k
Ω
3 k
Ω
10 MΩ
VO2
V03
O1
V
51 kΩ
V1
V2
0.001
μ
F
V
C1
V3
VCC
VC1
V1
V2
V
3
0
01
tt3
t4
t
2
t
t
VCC
t
0
t
1
VCC
VCC
VCC=+15V
1/2
LM2903
1/2
1/2
10 kΩ
10 kΩ
10 kΩ
10 kΩ
10 MΩ
10 MΩ
51 kΩ
51 kΩ
t2
to
t3
to
tA
to
Input gating signal
LM2903
LM2903
LM2903
VCC VCC
100 kΩ
3 kΩ
5.1 kΩ
/2
VCC /2
0.01 μF
500 pF
100 kΩ
0.1 μF
20 kΩ
50 kΩ
=+30V
+250 mV Vcontrol +50 V
700 Hz f 100 kHz
o
20 kΩ
3 kΩ
1/ 2
LM2903
1/ 2
LM2903
1/ 2
LM2903
Output 1
Output 2
VCC
VCC
Frequency control
voltage input
Vcontrol
10 kΩ
Package information LM2903
10/18 Doc ID 2470 Rev 10
6 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
LM2903 Package information
Doc ID 2470 Rev 10 11/18
6.1 DIP8 package information
Figure 22. DIP8 package mechanical drawing
Table 4. DIP8 package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A5.330.210
A1 0.38 0.015
A2 2.92 3.30 4.95 0.115 0.130 0.195
b 0.36 0.46 0.56 0.014 0.018 0.022
b2 1.14 1.52 1.78 0.045 0.060 0.070
c 0.20 0.25 0.36 0.008 0.010 0.014
D 9.02 9.27 10.16 0.355 0.365 0.400
E 7.62 7.87 8.26 0.300 0.310 0.325
E1 6.10 6.35 7.11 0.240 0.250 0.280
e 2.54 0.100
eA 7.62 0.300
eB 10.92 0.430
L 2.92 3.30 3.81 0.115 0.130 0.150
Package information LM2903
12/18 Doc ID 2470 Rev 10
6.2 SO-8 package information
Figure 23. SO-8 package mechanical drawing
Table 5. SO-8 package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A1.750.069
A1 0.10 0.25 0.004 0.010
A2 1.25 0.049
b 0.28 0.48 0.011 0.019
c 0.17 0.23 0.007 0.010
D 4.80 4.90 5.00 0.189 0.193 0.197
E 5.80 6.00 6.20 0.228 0.236 0.244
E1 3.80 3.90 4.00 0.150 0.154 0.157
e 1.27 0.050
h 0.25 0.50 0.010 0.020
L 0.40 1.27 0.016 0.050
L1 1.04 0.040
k1° 8°1° 8°
ccc 0.10 0.004
LM2903 Package information
Doc ID 2470 Rev 10 13/18
6.3 TSSOP8 package information
Figure 24. TSSOP8 package mechanical drawing
Table 6. TSSOP8 package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A1.200.047
A1 0.05 0.15 0.002 0.006
A2 0.80 1.00 1.05 0.031 0.039 0.041
b 0.19 0.30 0.007 0.012
c 0.09 0.20 0.004 0.008
D 2.90 3.00 3.10 0.114 0.118 0.122
E 6.20 6.40 6.60 0.244 0.252 0.260
E1 4.30 4.40 4.50 0.169 0.173 0.177
e 0.65 0.0256
k0° 8°0° 8°
L 0.45 0.60 0.75 0.018 0.024 0.030
L1 1 0.039
aaa 0.10 0.004
Package information LM2903
14/18 Doc ID 2470 Rev 10
6.4 DFN8 2x2 package mechanical data
Figure 25. DFN8 2x2 package mechanical drawing
Table 7. DFN8 2x2x0.6 mm package mechanical data (pitch 0.5 mm)
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 0.51 0.55 0.60 0.020 0.022 0.024
A1 0.05 0.002
A3 0.15 0.006
b 0.18 0.25 0.30 0.007 0.010 0.012
D 1.85 2.00 2.15 0.073 0.079 0.085
D2 1.45 1.60 1.70 0.057 0.063 0.067
E 1.85 2.00 2.15 0.073 0.079 0.085
E2 0.75 0.90 1.00 0.030 0.035 0.039
e 0.50 0.020
L0.500.020
ddd 0.08 0.003
!-3?6
LM2903 Package information
Doc ID 2470 Rev 10 15/18
Figure 26. DFN8 2x2 footprint recommendation
!-3?6
MM
MM
MM
MM
MM
MM
Ordering information LM2903
16/18 Doc ID 2470 Rev 10
7 Ordering information
Table 8. Order codes
Order code Temperature
range Package Packing Marking
LM2903N
-40°C to +125°C
DIP8 Tube LM2903N
LM2903D/DT SO-8 Tube or tape & reel 2903
LM2903YDT(1)
1. Qualified and characterized according to AEC Q100 and Q003 or equivalent, advanced screening
according to AEC Q001 & Q 002 or equivalent.
SO-8
(Automotive grade)
Tape & reel
2903Y
LM2903PT TSSOP8 2903
LM2903YPT(2)
2. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening
according to AEC Q001 & Q 002 or equivalent are on-going.
TSSOP8
(Automotive grade) 2903Y
LM2903Q2T DFN8 2x2mm K1Z
LM2903 Revision history
Doc ID 2470 Rev 10 17/18
8 Revision history
Table 9. Document revision history
Date Revision Changes
15-Jun-2003 1 Initial release.
2-May-2005 2 PPAP references inserted in the datasheet see table order code p1.
8-Aug-2005 3
Electrical characteristics table corrected (see Table 3 on page 5).
Pin connections diagram moved to cover page.
Lead-free package information added.
27-Oct-2005 4 PPAP part number added in Table 8: Order codes.
11-May-2007 5 ESD tolerance added in Table 1: Absolute maximum ratings on
page 4.
17-Jan-2008 6
Added Rthja and Rthjc, and ESD CDM parameters in Table 1:
Absolute maximum ratings.
Removed Vicm from electrical characteristics in Tab l e 3.
Reformatted package information in Section 6.
Added footnotes for automotive grade parts in Table 8: Order codes.
21-Feb-2008 7
Corrected SO-8 package mechanical data. Dimension E in drawing
was marked H in table.
Corrected revision history (revision 6 is of January 2008, not January
2007).
03-Dec-2009 8 Added pin description on cover page.
16-Feb-2012 9 Removed LM2903YD order code from Ta bl e 8 .
05-Dec-2012 10 Added the DFN8 package
Small modifications to Figure 2 and Ta bl e 1 .
LM2903
18/18 Doc ID 2470 Rev 10
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