1/10
LOW POWERDUAL VOLTAGE COMPARATORS
.WIDESINGLESUPPLYVOLTAGE RANGEOR
DUAL SUPPLIES +2V TO +36V OR ±1V TO
±18V
.VERYLOWSUPPLYCURRENT(0.4mA)INDE-
PENDENT OF SUPPLYVOLTAGE
(1 mW/comparator at +5V)
.LOW INPUT BIAS CURRENT: 25nATYP
.LOW INPUT OFFSETCURRENT : ±5nA TYP
.INPUT COMMON-MODE VOLTAGE RANGE
INCLUDESGROUND
.LOW OUTPUT SATURATION VOLTAGE :
250mV TYP. (IO= 4mA)
.DIFFERENTIAL INPUT VOLTAGE RANGE
EQUAL TO THE SUPPLY VOLTAGE
.TTL, DTL, ECL, MOS, CMOS COMPATIBLE
OUTPUTS
DESCRIPTION
This device consists of two independent low power
voltagecomparators designed specifically to oper-
ate from a single supply over a wide range of volt-
ages. Operation from split power supplies is also
possible.
These comparators also have a unique
characteris-tic in the fact that the input com-
mon-mode voltage range includes ground even
though operated from a single power supply volt-
age.
ORDER CODES
Part
Number Temperature
Range Package
NDP
LM2903 -40, +125oC•••
Example : LM2903N
1
2
3
45
6
7
8
-
+
-
+
PIN CONNECTIONS (top view)
1 - Output 1
2 - Inverting input 1
3 - Non-inverting input 1
4-V
CC-
5 - Non-inverting input 2
6 - Inverting input 2
7 - Output 2
8-V
CC+
LM2903
April 2000
N
DIP8
(PlasticPackage)
D
SO8
(PlasticMicropackage)
P
TSSOP8
(Thin ShrinkSmall OutlinePackage)
LM2903
2/10
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VCC Supply Voltage ±18 or 36 V
Vid Differential Input Voltage !36 V
ViInput Voltage -0.3 to +36 V
Output Short-circuit to Ground – (note 1) Infinite
Ptot Power Dissipation 830 mW
Toper Operating Free-air TemperatureRange -40 to +125 oC
Tstg Storage Temperature Range -65 to +150 oC
Notes : 1. Short-circuit fromthe output to VCC+can cause excessive heating andeventual destruction. The maximum output
current is approximately 20mA, independent of the magnitude of VCC+.
Non-inverting
Input
Inverting
Input
3.5µA
CC
V
CC
VCC
V
CC
V
O
V
3.5µA 100µA
100µA
SCHEMATIC DIAGRAM (1/2 LM2903)
LM2903
3/10
ELECTRICAL CHARACTERISTICS
VCC+= +5V, VCC–= 0V, Tamb =25
o
C (unless otherwise specified)
Symbol Parameter Min. Typ. Max. Unit
Vio Input Offset Voltage – (note 2)
Tamb = +25oC
Tmin.≤Tamb ≤Tmax.
17
15
mV
Iib Input Bias Current – (note 3)
Tamb = +25oC
Tmin.≤Tamb ≤Tmax.
25 250
400
nA
Iio Input Offset Current
Tamb = +25oC
Tmin.≤Tamb ≤Tmax.
550
150
nA
Avd Large Signal Voltage Gain
VCC = 15V, RL= 15kΩ,V
o= 1 to 11V 25 200 V/mV
ICC Supply Current (all comparators)
VCC = 5V, no load
VCC = 30V, no load 0.4
11
2.5
mA
Vicm Input Common Mode Voltage Range (VCC = 30V) - (note 4)
Tamb = +25oC
Tmin.≤Tamb ≤Tmax.
0
0VCC+-1.5
VCC+-2
V
Vid Differential Input Voltage - (note 6) VCC+V
Isink Output Sink Current
(Vid = -1V, VO= 1.5V) 6 16 mA
VOL Low Level Output Voltage
(Vid = -1V, Isink = 4mA)
Tamb =25
o
C
T
min.≤Tamb ≤Tmax.
250 400
700
mV
IOH High Level Output Current
(Vid = 1V, VCC =V
O= 30V)
Tamb =25
o
C
T
min.≤Tamb ≤Tmax.
0.1 1nA
µA
tre Small Signal Response Time
(RL= 5.1kΩto VCC+) - (note 5) 1.3 µs
trel Large Signal Response Time - (note 7)
TTL Input (Vref = +1.4 V, RL= 5.1kΩto VCC+)
Output Signal at 50% of final value
Output Signal at 95% of final value 500
1ns
µs
Notes : 2. Atoutput switchpoint,VO#1.4V,R
S=0ΩwithVCC+from 5Vto 30V and over thefullinputcommon-mode range (0V
toVCC+1.5V).
3. The direction of the input current is out of the IC dueto the PNP input stage. This current is essentially constant,
independent of the state of the output, so no loading charge exists on the reference or input lines.
4. The input common-mode voltage ofeither inputsignal voltage should not beallowed togo negative bymore than
0.3V. The upper end of the common-mode voltage range is VCC+–1.5V, but either or both inputs can go to +30V
without damage.
5. The response time specified is for a 100mV input step with 5mV overdrive.
6. Positive excursions of input voltage may exceed the power supply level.
As long asthe other voltage remains within thecommon-mode range thecomparator willprovide a proper output
state. Thelowinput voltagestate must not be lessthan –0.3V (or0.3V belowthenegative power supply,ifused).
7. Maximum values are guaranteed by design.
LM2903
4/10
SUPPLY CURRENT (mA)
1
0.8
0.6
0.4
0.2
010 20 30 40
SUPP LY VOLTAGE (V)
Tamb =+70 C
T
amb =+125
C
T
amb =0
C
T
amb =-55
C
R=
T
amb=+25
C
SUPPLY CURRENT versus
SUPPLY VOLTAGE
INPUT CURRENT (nA)
20
10 20 30 40
SUPPLY VOLTAGE (V)
Tamb =+70
C
T
amb =+125
C
T
amb=-55
C
40
60
80
0
Tamb =0
C
T
amb=+25
C
V=0V
i
R=10Ω
i9
INPUT CURRENT versus
SUPPLY VOLTAGE
Tamb=-55
C
T
amb =+125
C
T
amb=+25
C
Out of saturation
10 1
10-3
10-2
10-1
10 0
SATURATION VOLTAGE (V)
10-2 10 -1 10 010 110 2
OUTPUT SINKCURRENT (mA)
OUTPUT SATURATION VOLTAGE
versus OUTPUT CURRENT
5V
5.1kΩ
eo
eI
6
5
4
3
2
1
0
0
-50
-100
INPUT VOLTAGE (mV) OUTPUT VOLTAGE (V)
0 0.5 1 1.5 2
TIME (µs)
Input overdrive : 5mV
20mV
100mV
Tamb=+25 C
RESPONSE TIME FOR VARIOUS INPUT
OVERDRIVES - NEGATIVE TRANSITION
5V
5.1kΩ
eo
eI
6
5
4
3
2
1
0
100
50
INPUT VOLTAGE (mV) OUTPUT VOLTAGE (V)
0 0.5 1 1.5 2
TIME (µs)
Input overdrive : 100mV
20mV
5mV
Tamb= +25 C
0
RESPONSE TIME FOR VARIOUS INPUT
OVERDRIVES - POSITIVE TRANSITION
LM2903
5/10
VCC =5V
15kΩ
VO
+V
(ref)
-V(ref)
1/2
LM2903
TYPICAL APPLICATIONS
BASIC COMPARATOR
5V
100kΩ
+V
(ref)
-V
(ref)
1/2
LM2903 &
DRIVING CMOS
5V
10kΩ
+V
(ref)
-V
(ref)
&
&
1/2
LM2903
DRIVING TTL
5V
15kΩ
eo
0.5µF
100kΩ
eI
1kΩA = 100
V
~
1/2
LM2903
LOW FREQUENCY OP AMP
5V
15kΩ
eo
0.5µF
100kΩ
eI
1kΩA = 100
V
~2N 2222
(e = 0V for e = 0V)
I
o
1/2
LM2903
LOW FREQUENCY OP AMP
5V
10kΩ
eo
20MΩ
3kΩ
Magnetic pick-up
1/2
LM2903
10kΩ
TRANSDUCER AMPLIFIER
LM2903
6/10
eI~2N 2222
5V
eo
R1
100kΩ
1kΩ
5V
1MΩ
100kΩ
1MΩ
Offset Adjust
RsRI15kΩ
0.5µF
R2
1/2
LM2903
LOW FREQUENCY OP AMP WITH OFFSET
ADJUST
100kΩ
10kΩ
eI
20MΩ
5V
5.1kΩ
1N4148
1/2
LM2903
5.1kΩ5.1kΩ
100kΩ
ZERO CROSSING DETECTOR
(SINGLE POWER SUPPLY)
V
CC
Output 1
Output 2
V
CC
100kΩ
3kΩ
5.1kΩ
V
CC/2
V
CC /2
0.01µF
500pF
100kΩ
0.1µF
20kΩ
50kΩ
Frequencycontrol
voltage input
v
control
V
CC=+30V
+250mV V
control +50V
700 Hz f 100kHz
o
1/2
LM2903 1/2
LM2903
1/2
LM2903
20kΩ
3kΩ
TWO DECADES HIGH FREQUENCY VCO
10kΩ
eI~
RS
2RS
V(ref)
high
2RS
V(ref)
low
2N 2222
(12V)
VCC
Lamp
1/2
LM2903
1/2
LM2903
LIMIT COMPARATOR
2kΩ
0.1µF
200kΩf = 100kHz
eo
= 15V
V
CC
V
CC
0
100kΩ
1/2
LM2903
200kΩ
CRYSTAL CONTROLLED OSCILLATOR
LM2903
7/10
15V
5.1kΩ
eo
eI~
15V
1/2
LM2903
SPLIT-SUPPLY APPLICATIONS
ZERO CROSSING DETECTOR
15V
5.1kΩ
eo
eI~
15V
5V
1/2
LM2903
COMPARATOR WITH A NEGATIVE REF-
ERENCE
LM2903
8/10
PACKAGE MECHANICAL DATA
8 PINS -PLASTIC DIP
Dimensions Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 3.32 0.131
a1 0.51 0.020
B 1.15 1.65 0.045 0.065
b 0.356 0.55 0.014 0.022
b1 0.204 0.304 0.008 0.012
D 10.92 0.430
E 7.95 9.75 0.313 0.384
e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300
F 6.6 0260
i 5.08 0.200
L 3.18 3.81 0.125 0.150
Z 1.52 0.060
LM2903
9/10
PACKAGE MECHANICAL DATA
8 PINS -PLASTIC MICROPACKAGE (SO)
Dimensions Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 1.75 0.069
a1 0.1 0.25 0.004 0.010
a2 1.65 0.065
a3 0.65 0.85 0.026 0.033
b 0.35 0.48 0.014 0.019
b1 0.19 0.25 0.007 0.010
C 0.25 0.5 0.010 0.020
c1 45o(typ.)
D 4.8 5.0 0.189 0.197
E 5.8 6.2 0.228 0.244
e 1.27 0.050
e3 3.81 0.150
F 3.8 4.0 0.150 0.157
L 0.4 1.27 0.016 0.050
M 0.6 0.024
S8
o
(max.)
LM2903
10/10
0,25 mm
.010 inch
GAGE PLANE
Caaa
C
PLANE
SEATING
EA
A2
A1
D
b
e
E1
L
k
c
14
8
5
PIN 1 IDENTIFICATION
L1
PACKAGE MECHANICAL DATA
8 PINS -THIN SHRINK SMALL OUTLINE PACKAGE
Dim. Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 1.20 0.05
A1 0.05 0.15 0.01 0.006
A2 0.80 1.00 1.05 0.031 0.039 0.041
b 0.19 0.30 0.007 0.15
c 0.09 0.20 0.003 0.012
D 2.90 3.00 3.10 0.114 0.118 0.122
E 6.40 0.252
E1 4.30 4.40 4.50 0.169 0.173 0.177
e 0.65 0.025
k0
o8
o0
o8
o
l 0.50 0.60 0.75 0.09 0.0236 0.030
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consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Speci-
fications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all in-
formation previously supplied. STMicroelectronics products are not authorized for use as critical components in life support
devices or systems without express written approval of STMicroelectronics.
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