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LM2903
LOW POWER DUAL VOLTAGE COMPARATORS
.WI .VERYLOWSUPPLYCURRENT( .LOWI .LOWI .I .LOW .DI .TTL,
DESCRIPTION
DE SINGLE SUPPLY VOLTAGE RANGE OR DUAL SUPPLIES +2V TO +36V OR 1V TO 18V 0.4mA) INDEPENDENT OF SUPPLY VOLTAGE (1 mW/comparator at +5V) NPUT BIAS CURRENT : 25nA TYP NPUT OFFSET CURRENT : 5nA TYP NPUT COMMON-MODE VOLTAGE RANGE INCLUDES GROUND OUTPUT SATURATION VOLTAGE : 250mV TYP. (IO = 4mA) FFERENTIAL INPUT VOLTAGE RANGE EQUAL TO THE SUPPLY VOLTAGE DTL, ECL, MOS, CMOS COMPATIBLE OUTPUTS
N DIP8 (Plastic Package)
D SO8 (Plastic Micropackage)
P TSSOP8 (Thin Shrink Small Outline Package)
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. PIN CONNECTIONS (top view)
ORDER CODES
Part Number LM2903 Temperature Range -40, +125 C
o
Package N * D * P *
Example : LM2903N
1 2 3 4 + +
8 7 6 5
1 2 3 4 5 6 7 8 - Output 1 - Inverting input 1 - Non-inverting input 1 - VCC - Non-inverting input 2 - Inverting input 2 - Output 2 - VCC+
August 1998
1/10
LM2903
SCHEMATIC DIAGRAM (1/2 LM2903)
V CC
3.5A
100A
3.5A
100A
Non-inverting Input
V V CC V CC O
Inverting Input
V CC
ABSOLUTE MAXIMUM RATINGS
Symbol VCC Vid Vi Ptot Toper Tstg
Notes :
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 o
C C
2/10
LM2903
ELECTRICAL CHARACTERISTICS VCC+ = +5V, VCC- = 0V, Tamb = 25oC (unless otherwise specified)
Symbol Vio Parameter Input Offset Voltage - (note 2) o Tamb = +25 C 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) o Tamb = +25 C 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) o Tamb = 25 C 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+) 6 16 mV 250 400 700 0 0 25 Min. Typ. 1 Max. 7 15 nA 25 250 400 nA 5 50 150 V/mV 200 mA 0.4 1 1 2.5 VCC -1.5 VCC+ -2 VCC+ V mA
+
Unit mV
Iib
Iio
Avd ICC
Vicm
V
Vid Isink VOL
IOH
0.1 1 1.3
nA A s ns
tre trel
Notes :
300
2. At output switch point, VO 1.4V, RS = 0 with VCC+ from 5V to 30V and over the full input common-mode range (0V to VCC+ 1.5V). 3.
3/10
LM2903
SUPPLY CURRENT versus
1 SUPPLY CURRENT (mA) 0.8 0.6 0.4
Tamb = +125 C
INPUT CURRENT versus
80 Vi = 0V INPUT CURRENT (nA) 60 40 20 Ta mb = +125 C Ta mb = +70 C 0 10 20 30 SUP P LY VOLTAGE (V) 40 R = 10 9
i
Ta mb = -55 C
Ta mb = 0 C Ta mb= +25 C
Ta m b = +70 C
Ta mb = -55 C
Ta mb = 0 C Ta mb = +25 C
0.2
R=
0
10 20 30 S UP P LY VOLTAGE (V)
40
OUTPUT SATURATION VOLTAGE
10 10 10 10 10
1
RESPONSE TIME FOR VARIOUS INOUTPUT VOLTAGE (V)
SATURATION VOLTAGE (V)
Out of s a tura tion
0
Tamb = +125 C
-1
-2
Tamb = +25 C
-3 -2 -1 0 1 2
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 (s) 2
10
10
10
10
10
OUTPUT S INK CURRENT (mA)
RESPONSE TIME FOR VARIOUS INOUTPUT 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 (s )
5V
5 .1k
eI eo
2
4/10
LM2903
TYPICAL APPLICATIONS BASIC COMPARATOR
DRIVING CMOS
VCC = 5V 15k +V(re f) -V(re f) +V(re f) 1/2 LM2903 VO
1/2 LM2903
5V
100k
&
-V(re f)
DRIVING TTL
LOW FREQUENCY OP AMP
5V
5V
15k
10k
+V(re f)
1/2 LM2903
1/2 LM2903
~
& &
eI 100k A V = 100
eo 0.5 F
-V(re f)
1k
LOW FREQUENCY OP AMP
(e o = 0V for e I = 0V)
TRANSDUCER AMPLIFIER
5V
5V
Magnetic pick-up
1 5k
1/2 LM2903
~
10k
3k
2N 2222
0.5F
1/2 LM2903
eo
eI
20M
10k
100k
1k
eo
A V = 100
5/10
LM2903
LOW FREQUENCY OP AMP WITH OFFSET ADJUST
5V
Offse t Adjus t
1M 100k
ZERO CROSSING DETECTOR (SINGLE POWER SUPPLY)
5V
5V
R2
1M
15k 1/2 LM2903 0.5 F
100k
100k
5.1k
Rs
eI
~
RI
eI
2N 2222
5.1k
5.1k
1/2 LM2903
1N4148
20M
R1 100k
1k
eo
10k
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
0.1 F
20k 50k 20k
0.01 F
1/2 LM2903
Output 1
V /2 CC
Output 2
V /2 CC
1/2 LM2903
V = +30V CC +250mV V control +50V 700 Hz fo 100kHz
LIMIT COMPARATOR
VCC (12V)
CRYSTAL CONTROLLED OSCILLATOR
V = 1 5V CC
2R S V(ref)
h igh
10k
1/2 LM2903
200k
100k Lamp
2k
V CC
0.1 F
1/2 LM2903
RS
0 eo
e
I~
2R S V(ref)
low
1/2 LM290 3
f = 100kHz
2N 222 2
200k
6/10
LM2903
SPLIT-SUPPLY APPLICATIONS ZERO CROSSING DETECTOR
COMPARATOR WITH A NEGATIVE REFERENCE
15V
15V
5.1k
1/2 LM2903 e
I~
5.1k
1/2 LM2903 e
I~
eo 5V
eo
15V
15V
7/10
LM2903
PACKAGE MECHANICAL DATA 8 PINS -PLASTIC DIP
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
3.18
0.125
8/10
DIP8.TBL
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 45 (typ.) 5.0 6.2
o
Min. 0.004 0.026 0.014 0.007 0.010 0.189 0.228
Inches Typ.
Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.197 0.244
1.27 3.81 3.8 0.4 4.0 1.27 0.6 8 (max.)
o
0.050 0.150 0.150 0.016 0.157 0.050 0.024
9/10
SO8.TBL
PM-SO8.EPS
LM2903
PACKAGE MECHANICAL DATA 8 PINS -THIN SHRINK SMALL OUTLINE PACKAGE
Dim. A A1 A2 b c D E E1 e k l
Millimeters Min. 0.05 0.80 0.19 0.09 2.90 4.30 0o 0.50 0.60 3.00 6.40 4.40 0.65 8o 0.75 0o 0.09 4.50 0.169 1.00 Typ. Max. 1.20 0.15 1.05 0.30 0.20 3.10 Min. 0.01 0.031 0.007 0.003 0.114
Inches Typ. Max. 0.05 0.006 0.039 0.041 0.15 0.012 0.118 0.252 0.173 0.025 8o 0.0236 0.030 0.177 0.122
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the 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. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously suppl ied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a trademark of STMicroelectronics (c) 1998 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
ORDER CODE :
10/10

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