This is information on a product in full production.
October 2018 DocID2470 Rev 13 1/21
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
Related products
See the LM2903W for similar devices with
higher ESD performances
See the LM2903H for sim ilar dev ices with
operating temperature up to 150 °C
Description
This device consists of two independent low-
power voltage comparators de sig ne d sp ecif ica lly
to operate from a single sup ply over a wide range
of voltages. Oper ation from split power supplies is
also possible.
In addition, the device 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.
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Contents LM2903
2/21 DocID2470 R e v 13
Contents
1 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Package pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical application schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.1 SO8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2 TSSOP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.3 MiniSO8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.4 DFN8 2x2 package mechanical data (LM2903Q2T) . . . . . . . . . . . . . . . . 15
6.5 DFN8 2x2 package mechanical data (LM2903YQ3T) . . . . . . . . . . . . . . . 17
7 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
DocID2470 Rev 13 3/21
LM2903 Schematic diagram
21
1 Schematic diagram
Figure 1. Schematic diagram (1/2 LM2903)
3.5 μA100 μA3.5 μA 100 μA
Non-inverting
input
Inverting
input
Package pin connections LM2903
4/21 DocID2470 R e v 13
2 Package pin connections
Figure 2. Pin connections for each package (top view)(a)
a. Exposed pad can be left floating or connected to ground.
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DocID2470 Rev 13 5/21
LM2903 Absolute maximum ratings and operating conditions
21
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)
SO8
TSSOP8
MiniSO8
DFN8 2x2 mm
2. Short-circuits can cause excessive heating and destructive dissipation. Values are typical.
125
120
190
57 °C/W
Rthjc
Thermal resistance junction to case(2)
SO8
TSSOP8
MiniSO8
DFN8 2x2 mm
40
37
39
57
TjMaximum junction temp erature +150 °C
Tstg Storage temperature range -65 to +150
ESD
Human body mode l (HBM)(3)
3. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 kresistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are left 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 ). This is done for all couples of
connected pin combinations while the other pins are left floating.
200
CDM: charged device model (all packages
except MiniSO8)(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
CDM: charged device model (MiniSO8) 1.3
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
Electrical characteristics LM2903
6/21 DocID2470 R e v 13
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 curr ent
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 k, 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
11
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 1nA
µA
Isink Output sink current (Vid = -1 V, Vo = 1.5 V) 6 16 mA
tres Small signal response time(4) (RL = 5.1 k to VCC+)1.3µs
trel
Large signal response time(5)
TTL input (Vref = +1.4 V, RL= 5.1 k to VCC+)
Output signal at 50% of final value
Output signal at 95% of final value 500
1ns
µs
1. At output switch point, VO 1.4 V, RS = 0 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.
DocID2470 Rev 13 7/21
LM2903 Electrical characteristics
21
Figure 7. Response time for various input overdrives - positive transition
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
Typical application schematics LM2903
8/21 DocID2470 R e v 13
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
DocID2470 Rev 13 9/21
LM2903 Typical application schematics
21
Figure 14. Low frequency op-amp with offset
adjust Figure 15. Zero crossing detector
(single power supply)
Figure 16. Limit comparator Figure 17. Split-supply applications - zero
crossing detector
100 kΩ
10 kΩ
el
20 MΩ
5 V
1N4148
5.1 kΩ
5.1 kΩ
100 kΩ
1/ 2
LM2903
5.1 kΩ
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
Typical application schematics LM2903
10/21 DocID2470 Rev 13
Figure 20. Time delay gen erator
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
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
DocID2470 Rev 13 11/21
LM2903 Typical application schematics
21
Figure 21. Two-decade, high-frequency VCO
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
12/21 DocID2470 Rev 13
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.
DocID2470 Rev 13 13/21
LM2903 Package information
21
6.1 SO8 package information
Figure 22. SO8 package mechanical drawing
Table 4. SO8 packag e mechanical data
Ref.
Dimensions
mm 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
Package information LM2903
14/21 DocID2470 Rev 13
6.2 TSSOP8 package information
Figure 23. TSSOP8 package mechanical drawing
Table 5. TSSOP8 packag e mechanical data
Ref.
Dimensions
mm 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
DocID2470 Rev 13 15/21
LM2903 Package information
21
6.3 MiniSO8 package information
Figure 24. MiniSO8 package mechanical drawing
Tabl e 6. Min iSO 8 package mechan ica l da ta
Ref.
Dimensions
mm Inches
Min. Typ. Max. Min. Typ. Max.
A 1.1 0.043
A1 0 0.15 0 0.006
A2 0.75 0.85 0.95 0.030 0.033 0.037
b 0.22 0.40 0.009 0.016
c 0.08 0.23 0.003 0.009
D 2.80 3.00 3.20 0.11 0.118 0.126
E 4.65 4.90 5.15 0.183 0.193 0.203
E1 2.80 3.00 3.10 0.11 0.118 0.122
e 0.65 0.026
L 0.40 0.60 0.80 0.016 0.024 0.031
L1 0.95 0.037
L2 0.25 0.010
k 0 ° 8 ° 0 ° 8 °
ccc 0.10 0.004
Package information LM2903
16/21 DocID2470 Rev 13
6.4 DFN8 2x2 package information (LM2903Q2T)
Figure 25. DFN8 2x2x0.6 mm package mechanical drawing (pitch 0.5 mm)
Table 7. DFN8 2x2x0.6 mm package mechanical data (pitch 0.5 mm)
Ref.
Dimensions
mm 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
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DocID2470 Rev 13 17/21
LM2903 Package information
21
Figure 26. DFN8 2x2x0.6 mm recommended footprint
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Package information LM2903
18/21 DocID2470 Rev 13
6.5 DFN8 2x2 package information (LM2903YQ3T)
Figure 27. DFN8 2x2 mm wettable flanks package outline
Table 8. DFN8 2x2 mm wettable flanks package mechanical data
Ref.
Dimensions
mm Inches
Min. Typ. Max. Min. Typ. Max.
A 0.70 0.75 0.80 0.027 0.029 0.031
A1 0.10 0.003
b 0.20 0.25 0.30 0.007 0.009 0.011
D 1.95 2.00 2.05 0.076 0.078 0.080
D1 0.80 0.90 1.00 0.031 0.035 0.039
E 1.95 2.00 2.05 0.076 0.078 0.080
E1 1.50 1.60 1.70 0.059 0.062 0.066
e 0.50 0.019
F 0.05 0.001
G 0.25 0.30 0.35 0.009 0.011 0.013
aaa 0.10 0.003
DocID2470 Rev 13 19/21
LM2903 Ordering information
21
7 Ordering information
Table 9. Orde r co d e
Order code Temperature
range Package Packing Marking
LM2903D/DT
-40 °C to +125 °C
SO8 Tube or tape and
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.
SO8
(automotive grade)
Tape and reel
2903Y
LM2903PT TSSOP8 2903
LM2903YPT(1) TSSOP8
(automotive grade) 2903Y
LM2903ST MiniSO8 K431
LM2903YST(1) MiniSO8
(automotive grade) K419
LM2903Q2T DFN8 2x2 mm K1Z
LM2903YQ3T(1) DFN8 2x2 mm
wettable flanks K5M
Revision history LM2903
20/21 DocID2470 Rev 13
8 Revision history
Table 10. 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 9: 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 Table 3.
Reformatted package information in Section 6.
Added footnotes for automotive grade parts in Table 9: 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 Table 9.
05-Dec-2012 10 Added the DFN8 package
Small modifications to Figure 2 and Table 1.
21-Nov-2013 11
Added MiniSO8 package
Added Related products
Table 1: updated Rthjc and CDM information for MIniSO8
Table 9: added order code LM2903YST for MiniSO8 (automotive
grade).
Updated disclaimer
15-Nov-2017 12 Added new RPN LM2903YQ3T Table 9: Order codes, and new
Section 6.5: DFN8 2x2 package mechanical data (LM2903YQ3T).
Removed DIP8 package.
08-Oct-2018 13 Updated Section 7: Ordering informa tion.
DocID2470 Rev 13 21/21
LM2903
21
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