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LM2903
LOW POWER DUAL VOLTAGE COMPARATORS
. . . . . . . .
WIDE SINGLE SUPPLY VOLTAGE RANGE OR DUAL SUPPLIES +2V TO +36V OR ±1V TO ±18V VERY LOW SUPPLY CURRENT (0.4mA) INDEPENDENT OF SUPPLY VOLTAGE (1 mW/comparator at +5V) LOW INPUT BIAS CURRENT : 25nA TYP LOW INPUT OFFSET CURRENT : ±5nA TYP INPUT COMMON-MODE VOLTAGE RANGE INCLUDES GROUND LOW OUTPUT SATURATION VOLTAGE : 250mV TYP. (IO = 4mA) DIFFERENTIAL INPUT VOLTAGE RANGE EQUAL TO THE SUPPLY VOLTAGE TTL, DTL, ECL, MOS, CMOS COMPATIBLE OUTPUTS
N DIP8 (Plastic Package)
D SO8 (Plastic Micropackage)
PIN CONNECTIONS (top view)
1 2 3 4 + +
8 7 6 5
12345678Output 1 Inverting input 1 Non-inverting input 1 VCC Non-inverting input 2 Inverting input 2 Output 2 + VCC
March 1996
1/9
2903-01.TBL
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. These comparators also have a unique characteristic in the fact that the input common-mode voltage range includes ground even though operated from a single power supply voltage.
ORDER CODES
Part Number Temperature Range
o
LM2903 40, +125 C Example : LM2903N
Package N D · ·
LM2903
SCHEMATIC DIAGRAM (1/2 LM2903)
V CC
3.5 µA
100 µA
3.5 µA
100 µA
Non-inverting Input
V V CC V CC O
Inverting Input
V CC
ABSOLUTE MAXIMUM RATINGS
Symbol VCC Vid Vi Ptot Toper Tstg
No tes :
Parameter Supply Voltage Differential Input Voltage Input Voltage Output Short-circuit to Ground (note 1) Power Dissipation Operating Free-air TemperatureRange Storage Temperature Range
Value ±18 or 36 ±36 0.3 to +36 Infinite 830 40 to +125 65 to +150
Unit V V V mW o C o C
2903-02.TBL
1. Short -circuit from the output to VCC + can cause excessi ve heat ing and+eventual destruction. The maximum output curr ent is approxi mately 20mA, i ndependent of the magni tude of VC C .
2/9
2903-02.EPS
LM2903
ELECTRICAL CHARACTERISTICS VCC+ = +5V, VCC = 0V, T amb = 25oC (unless otherwise specified)
Symbol Vio Parameter Input Offset Voltage (note 2) Tamb = +25oC Tmin. Tamb Tmax. Input Bias Current (note 3) o Tamb = +25 C Tmin. Tamb Tmax. Input Offset Current o Tamb = +25 C Tmin. Tamb Tmax. Large Signal Voltage Gain VCC = 15V, RL = 15k, Vo = 1 to 11V Supply Current (all comparators) VCC = 5V, no load VCC = 30V, no load Input Common Mode Voltage Range - (note 4) Tamb = +25oC Tmin. Tamb Tmax. Differential Input Voltage - (note 6) Output Sink Current (Vid = -1V, VO = 1.5V) Low Level Output Voltage (Vid = -1V, Isink = 4mA) o Tamb = 25 C Tmin. Tamb Tmax High Level Output Current (Vid = 1V, VCC = VO = 30V) Tamb = 25oC Tmin. Tamb Tmax Response Time + (R L = 5.1k to VCC ) (note 5) Large Signal Response Time + (Vi = TTL, Vref = +1.4 V, RL = 5.1k to VCC ) Min. Typ. 1 Max. 7 15 nA 25 250 400 nA 5 50 150 V/mV 25 200 mA 0.4 1 0 0 1 2.5 VCC+ -1.5 + VCC -2 VCC+ 6 16 mV 250 400 700 V Unit mV
Iib
Iio
Avd ICC Vicm
Vid Isink VOL
V mA
IOH
0.1 1
nA µA
2903-03.TBL
tre trel
Notes :
1.3 300
µs ns
2. At output switch point, V O 1.4V, R S = 0 w it h VCC + from 5V to 30V and over the full input common-mode range (0V to V CC + 1.5V). 3. The directi on of t he input current is out of t he IC due t o the PN P i nput stage. Thi s current i s essentiall y constant, independent of the state of the output, so no loadi ng charge exists on the reference or i nput lines. 4. The input common-mode voltage of either input signal voltage shoul d not be allowed to go negative by more than 0.3V . The upper end of the common- mode voltage range is VCC + 1.5V, but eit her or bot h inputs can go to +30V wi thout damage. 5. The response ti me specif ied is for a 100mV input st ep w it h 5mV overdrive. For larger overdri ve si gnal s 300ns can be obtained. 6. As long as the other volt age r emains withi n the common-mode range the comparat or wi ll provi de a proper output state. The low input vol tage state must not be less than 0. 3V (or 0.3V bel ow the negat iv e power supply, i f used).
3/9
LM2903
SUPPLY CURRENT versus SUPPLY VOLTAGE
1 SUPPLY CURRENT (mA) 0.8 0.6 0.4
Tamb = +125 C
INPUT CURRENT versus SUPPLY VOLTAGE
80 Vi = 0V INPUT CURRENT (nA) 60 40 20 Ta mb = +125 C Ta mb = +70 C 10 20 30 SUP P LY VOLTAGE (V) 40
2903-04.EPS 2903-06.EPS
Ta mb = -55 C
Ta mb = 0 C Ta mb= +25 C
Ta m b = +70 C
R = 10 9
i
Ta mb = -55 C
Ta mb = 0 C Ta mb = +25 C
0.2
R =
2903-03.EPS
0
10 20 30 S UP P LY VOLTAGE (V)
40
0
OUTPUT SATURATION VOLTAGE versus OUTPUT CURRENT
10 10 10 10 10
1
RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES - NEGATIVE TRANSITION
OUTPUT VOLTAGE (V)
SATURATION VOLTAGE (V)
Out of s a tura tion
0
Tamb = +125 C
-1
-2
Tamb = +25 C
-3
2903-05.EPS
INPUT VOLTAGE (mV)
Tamb = -55 C
6 5 4 3 2 1 0 0 -50 -100
Input ove rdrive : 5mV 20mV
eI
5V
5.1k
eo
100mV
T amb = +25 C 0 0.5 1 1.5 TIME (µs) 2
10
-2
10
-1
10
0
10
1
10
2
OUTPUT S INK CURRENT (mA)
RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES - POSITIVE TRANSITION
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (mV)
6 Input overdrive : 100mV 5 4 5mV 3 2 20mV 1 0 100 Ta mb = +25 C 50 0 0 0.5 1 1.5 TIME (µs )
5V
5 .1k
eI eo
2
2903-07.EPS
4/9
LM2903
TYPICAL APPLICATIONS BASIC COMPARATOR
DRIVING CMOS
VCC = 5V 15k +V(re f) 1/2 LM2903 -V(re f)
2903-08.EPS
5V
100k
+V(re f) VO
-V(re f)
1/2 LM2903
&
DRIVING TTL
LOW FREQUENCY OP AMP
5V
5V
15k
10k
+V(re f)
1/2 LM2903
1/2 LM2903
~
e
& &
2903-10.EPS
I
eo 100k 0.5 µF
2903-11.EPS
-V(re f)
1k A V = 100
LOW FREQUENCY OP AMP
(e
o=
TRANSDUCER AMPLIFIER
5V
0V for e I = 0V)
5V
Magnetic pick-up
15k
1/2 LM2903
~
10k
3k
2N 2222
0.5µF
1/2 LM2903
eo
eI
20M
100k
2903-12.EPS
A V = 100
5/9
2903-13.EPS
1k
eo
10k
2903-09.EPS
LM2903
LOW FREQUENCY OP AMP WITH OFFSET ADJUST
5V
Offse t Adjus t
100k
ZERO CROSSING DETECTOR (SINGLE POWER SUPPLY)
5V
5V
R2
1M
1M
15k 1/2 LM2903 0.5 µF
100k
100k
5.1k
Rs
eI
~
RI
eI
2N 2222
5.1k
5.1k
1/2 LM2903
1N4148
R1 100k
1k
20M
eo
2903-14.EPS
10k
2903-15.EPS
TWO DECADES HIGH FREQUENCY VCO
V CC
100k 100k
V CC
3k
500 pF
1/2 LM2903
3k
5.1k
Frequ ency con trol voltage input vcontrol
0.1µF
20k 50k 20k
0.01µF
1/2 LM2903
Output 1
V /2 CC
Output 2
V /2 CC
1/2 LM2903
2903-16.EPS
V = +30V CC +250mV V control +50V 700 Hz fo 100kHz
LIMIT COMPARATOR
VCC (12V)
CRYSTAL CONTROLLED OSCILLATOR
V = 15V CC
2R S V(ref)
h igh
10k
1/2 LM2903
200k 100k Lamp
2k
V CC
0.1µF
1/2 LM2903
RS
eo
0
e
I ~
2R S V(ref)
low
1/2 LM290 3
f = 100kHz
2N 222 2
2903-17.EPS
2 00k
2903-18.EPS
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LM2903
SPLIT-SUPPLY APPLICATIONS ZERO CROSSING DETECTOR
COMPARATOR WITH A NEGATIVE REFERENCE
15V
15V
5.1k
1/2 LM2903
I ~
5.1k
1/2 LM2903 e
2903-19.EPS
eo
I ~
eo
e
5V 15V 15V
2903-20.EPS
7/9
LM2903
PACKAGE MECHANICAL DATA 8 PINS -PLASTIC DIP OR CERDIP
Dimensions A a1 B b b1 D E e e3 e4 F i L Z
Min. 0.51 1.15 0.356 0.204 7.95
Millimeters Typ. 3.32
Max.
Min. 0.020 0.045 0.014 0.008 0.313
Inches Typ. 0.131
Max.
1.65 0.55 0.304 10.92 9.75 2.54 7.62 7.62 6.6 5.08 3.81 1.52
0.065 0.022 0.012 0.430 0.384 0.100 0.300 0.300 0260 0.200 0.150 0.060
DIP8.TBL
3.18
0.125
8/9
PM-DIP8.EPS
LM2903
PACKAGE MECHANICAL DATA 8 PINS -PLASTIC MICROPACKAGE (SO)
Dimensions A a1 a2 a3 b b1 C c1 D E e e3 F L M S
Min. 0.1 0.65 0.35 0.19 0.25 4.8 5.8
Millimeters Typ.
Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 5.0 6.2
Min. 0.004 0.026 0.014 0.007 0.010 0.189 0.228
Inches Typ.
45 (typ.) 0.197 0.244 0.050 0.150 4.0 1.27 0.6 8 (max.)
SO8.TBL
o
Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020
1.27 3.81 3.8 0.4 0.150 0.016
o
0.157 0.050 0.024
Information furni shed is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other right s of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned in this publication are subject to change without notice. This publ ication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. © 1996 SGS-THOMSON Microelectronics Printed in Italy All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
ORDER CODE
9/9
PM-SO8.EPS