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LM2903
LOW POWER DUAL VOLTAGE COMPARATORS
.WI .VERYLOWSUPPLYCURRENT( .LOWI .LOWI .I .LOW .DI .TTL,
DESCRIPTION
DE SINGLE SUPPLYVOLTAGE 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)
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 characteris-tic 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)
P TSSOP8 (Thin Shrink Small Outline Package)
ORDER CODES
Part Number LM2903 Temperature Range -40, +125oC 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 VCCNon-inverting input 2 Inverting input 2 Output 2 VCC+
April 2000
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LM2903
SCHEMATIC DIAGRAM (1/2 LM2903)
V CC
3.5A
100A
3.5A
100A
Non-inve rting Input
V V CC V CC O
Inverting Input
V CC
ABSOLUTE MAXIMUM RATINGS
Symbol VCC Vid Vi Ptot Toper Tstg
Not es :
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
1. Short -ci rcuit f rom t he output to V CC + can cause excessi ve heat ing and event ual dest ruct i on. The maxi mum out put + current is approxi matel y 20mA , i ndependent of t he magni t ude of V C C .
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LM2903
ELECTRICAL CHARACTERISTICS + - o VCC = +5V, VCC = 0V, Tamb = 25 C (unless otherwise specified)
Symbol Vio Parameter Input Offset Voltage - (note 2) Tamb = +25oC Tmin. Tamb Tmax. Input Bias Current - (note 3) Tamb = +25oC Tmin. Tamb Tmax. Input Offset Current Tamb = +25oC 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 (VCC = 30V) - (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) Tamb = 25oC Tmin. Tamb Tmax. High Level Output Current (Vid = 1V, VCC = VO = 30V) Tamb = 25oC Tmin. Tamb Tmax. Small Signal Response Time (RL = 5.1k to VCC+) - (note 5) Large Signal Response Time - (note 7) TTL Input (Vref = +1.4 V, RL = 5.1k to VCC+) Output Signal at 50% of final value Output Signal at 95% of final value 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 V CC -2 VCC+ V mA
+
Unit mV
Iib
Iio
Avd ICC Vicm
V
Vid Isink V OL
IOH
0.1 1 1.3
nA A s
tre trel
500 1
ns s
Note s :
2. A t output swi tch point , V O # 1. 4V, R S = 0 wi th V C C + f rom 5V to 30V and over the f ull i nput common-mode range (0V t o V C C + 1. 5V). 3. T he di rect i on of t he i nput current i s out of the IC due t o the P NP i nput stage. T his current is essent i al l y const ant , i ndependent of t he st ate of the out put , so no l oadi ng charge exi sts on the ref erence or i nput li nes. 4. T he input common-mode vol tage of eit her i nput si gnal vol t age shoul d not be al lowed t o go negat i ve by more t han 0.3V . T he upper end of t he common-mode vol tage range is V C C + -1. 5V, but eit her or bot h input s can go t o +30V wi thout damage. 5. T he response t i me specif ied i s for a 100mV input st ep wi th 5mV overdri ve. 6. P osi ti ve excursi ons of i nput vol t age may exceed t he power suppl y l evel. A s l ong as the other vol tage remains wit hi n the common-mode range the comparator wil l provi de a proper output stat e. The l ow i nput vol tage stat e must not be less than -0. 3V (or 0. 3V bel ow t he negati ve power suppl y, i f used). 7. Maxi mum val ues are guaranteed by desi gn.
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LM2903
SUPPLY CURRENT versus SUPPLY VOLTAGE
1 SUPPLY CURRENT (mA) 0.8 0.6 0.4
Ta mb = +125 C
INPUT CURRENT versus SUPPLY VOLTAGE
80
Tamb = -55 C
Vi = 0V INPUT CURRENT (nA) 60 40 20 Ta mb = +125 C Ta mb = +70 C 0 10 20 30 S UP P LY VOLTAGE (V) 40 R = 10 9
i
Tamb = 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 versus OUTPUT CURRENT
SATURATION VOLTAGE (V) 10 10 10 10 10
1
RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES - NEGATIVE TRANSITION
OUTPUT VOLTAGE (V)
Out of sa 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 overdrive : 5mV 20mV 100mV
eI
5V
5.1k
eo
Tamb = +25 C 0 0.5 1 1.5 TIME (s ) 2
10
10
10
10
10
OUTP UT SINK 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 (s )
5V
5.1 k
eI eo
2
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LM2903
TYPICAL APPLICATIONS BASIC COMPARATOR
DRIVING CMOS
VCC = 5V 15k +V(ref) -V(ref) +V(ref)
5V
100k
1/2 LM2903
1/2 LM2903
&
VO
-V(ref)
DRIVING TTL
LOW FREQUENCY OP AMP
5V
5V
15k
10k
+V(re f)
1/2 LM2903
1/2 LM290 3
~
& &
eI 100k A V = 100
eo 0.5F
-V(re f)
1k
LOW FREQUENCY OP AMP
(e o = 0V for e I = 0V)
TRANSDUCER AMPLIFIER
5V
5V
Magne tic pick-up
15k
1/2 LM2903
~
10k
3k
2N 2222
0.5 F
1/2 LM2903
eo
eI
20M
10k
1 00k
1k
eo
A V = 100
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LM2903
LOW FREQUENCY OP AMP WITH OFFSET ADJUST
5V
Offs e t Adjus t
1M 100k
ZERO CROSSING DETECTOR (SINGLE POWER SUPPLY)
5V
5V
R2
1M
15k
100k
100k
5.1k
Rs
eI
~
RI
eI
2N 2222
5.1 k
5.1k
1/2 LM2903
1/2 LM2903
0.5 F
1N4148
20M
R1 100k
1k
eo
10k
TWO DECADES HIGH FREQUENCY VCO
V CC
100k 100k
V CC
3k
500pF
1/2 LM2903
3k
5.1k
Fre que nc y con trol volta ge input vcontrol
0.1 F
20k 50k 20k
0.01 F
1/2 LM2903
Outp ut 1
V /2 CC
Output 2
V /2 CC
1/2 LM2903
V = +3 0V CC +2 50mV V control +5 0V 700 Hz fo 100kHz
LIMIT COMPARATOR
VCC (12V)
CRYSTAL CONTROLLED OSCILLATOR
V = 15V CC
2R S V(re f) h igh RS
10k
1/2 LM2903
Lamp
200k
100k
2k
V CC
0.1 F
1/2 LM2903
eo
0
e
I~
2R S V(re f) low
1/2 LM2903
f = 100kHz
2N 2222
200k
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LM2903
SPLIT-SUPPLY APPLICATIONS ZERO CROSSING DETECTOR 15V COMPARATOR WITH A NEGATIVE REFERENCE 15V
5.1k
1/2 LM2903
e
I~
5.1k
1/2 LM2903
e
I~
eo 5V
eo
15V
15V
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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
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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 o (typ.) 5.0 6.2
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
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LM2903
PACKAGE MECHANICAL DATA 8 PINS -THIN SHRINK SMALL OUTLINE PACKAGE
k
c
0,25 mm .010 inch GAGE PLANE
L E1
SEATING PLANE
A A2 A1
5
C
E
L1 D
4
b
C
8
aaa
PIN 1 IDENTIFICATION
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
1
e
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 supplied. 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) 2000 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. (c) http://www.st.com
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