LM2903P Fast Delivery |IC PHOENIX CO.,LIMITED

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LM2903P
Low power dual voltage comparators
LOW POWER DUAL VOLTAGE COMPARATORS WIDE SINGLESUPPLYVOLTAGE RANGE OR
DUAL SUPPLIES +2V TO +36V OR ±1V TO
±18V. VERY LOWSUPPLYCURRENT(0.4mA)INDE-
PENDENT OF SUPPLY VOLTAGE mW/comparatorat +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
DESCRIPTION
This device consistsof two independent low power
voltage comparators designed specificallyto oper-
ate froma single supply overa wide rangeof volt-
ages. Operation from split power suppliesis 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 froma single power supply volt-
age.
ORDER CODES
Part
Number
Temperature
Range
Package
NDP
LM2903 -40, +125C •• •
Example: LM2903N -
PIN CONNECTIONS (top view)- Output1- Inverting input1- Non-inverting input1 VCC- Non-inverting input2- Inverting input2- Output2 VCC
LM2903
DIP8
(Plastic Package)
SO8
(Plastic Micropackage)
TSSOP8
(Thin ShrinkSmall OutlinePackage)
LM2903
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VCC Supply Voltage ±18or36 V
Vid Differential Input Voltage !36 V Input Voltage -0.3to +36 V
Output Short-circuitto Ground– (note1) Infinite
Ptot Power Dissipation 830 mW
Toper Operating Free-air TemperatureRange -40to +125C
Tstg Storage Temperature Range -65to +150 oC
Notes: 1. Short-circuit fromthe outputtoVCCcan cause excessive heating and eventual destruction. The maximum output
currentis approximately 20mA, independentofthe magnitudeofVCC.
Non-inverting
Input
Inverting
Input
3.5μAV
3.5μA 100μA100μA
SCHEMATIC DIAGRAM (1/2 LM2903)
LM2903
ELECTRICAL CHARACTERISTICSCC= +5V,VCC= 0V,Tamb =25C (unless otherwise specified)
Symbol Parameter Min. Typ. Max. Unit
Vio Input Offset Voltage– (note2)Tamb= +25oC
Tmin.≤ Tamb≤ Tmax.ib Input Bias Current– (note3)
Tamb= +25oCmin.≤Tamb≤Tmax. 250
Iio Input Offset Current
Tamb= +25C
Tmin.≤ Tamb≤ Tmax.
Avd Large Signal Voltage Gain
VCC= 15V,RL= 15kΩ,Vo=1to 11V 25 200 V/mV
ICC Supply Current (all comparators)
VCC= 5V,no load
VCC= 30V,no load
2.5icm Input Common Mode Voltage Range(VCC= 30V)- (note4)amb= +25oCmin.≤Tamb≤Tmax.CC -1.5
VCC+-2
Vid Differential Input Voltage- (note6) VCC+ V
Isink Output Sink Current(Vid= -1V,VO= 1.5V) 6 16 mA
VOL Low Level Output Voltage
(Vid= -1V,Isink= 4mA)Tamb =25oC
Tmin.≤ Tamb≤ Tmax.
250 400
700OH High Level Output Current
(Vid= 1V, VCC =VO= 30V)
Tamb =25C
Tmin.≤ Tamb≤ Tmax.
tre Small Signal Response Time
(RL= 5.1kΩto VCC+)- (note5) 1.3 μsrel Large Signal Response Time- (note7)
TTL Input (Vref= +1.4V,RL= 5.1kΩto VCC)
Output Signalat 50%of final valueOutput Signalat 95%of final value
Notes: 2.At output switch point,VO #1.4V,RS =0Ω withVCC from 5Vto 30V and overthefull input common-mode range (0VVCC+ 1.5V). The directionofthe input currentisoutoftheIC duetothe PNP input stage. This currentis essentially constant,
independentofthe stateofthe output,sono loading charge existsonthe referenceor input lines. The input common-mode voltageof either input signal voltage shouldnotbe allowed togo negativeby more than
0.3V. The upper endofthe common-mode voltage rangeisVCC+ –1.5V, but eitheror both inputs cangoto +30V
without damage. The response time specifiedisfora 100mV input step with 5mV overdrive. Positive excursionsof input voltage may exceed the power supply level. longasthe other voltage remains withinthe common-mode range thecomparator will providea proper output
state. Thelow input voltagestate mustnotbe less than –0.3V (or0.3V belowthe negative power supply,if used). Maximum values are guaranteedby design.
LM2903
SUPPLY
CURRENT
(mA)
0.2 10 20 30 40
SUPPLY VOLTAGE (V)
Tamb =+70 C
Tamb =+125 C
Tamb =0 C
Tamb =-55 C=
Tamb=+25 C
SUPPLY CURRENT versus
SUPPLY VOLTAGE
INPUT
CURRENT
(nA) 20 30 40
SUPPLY VOLTAGE (V)
Tamb =+70 C
Tamb =+125 C
Tamb=-55 C
Tamb =0 C
Tamb=+25 C 0Vi10Ωi
INPUT CURRENT versus
SUPPLY VOLTAGE
Tamb=-55 C
Tamb =+125 C
Tamb=+25 C
Outof saturation1-3-2-10
SATURATION
VOLTAGE
(V)-2 10-1 100 101 102
OUTPUT SINKCURRENT (mA)
OUTPUT SATURATION VOLTAGE
versus OUTPUT CURRENT
5.1kΩ
INPUT
VOLTAGE
(mV)
OUTPUT
VOLTAGE
(V) 0.5 1 1.5 2
TIME (μs)
Input overdrive: 5mV
20mV
100mV
Tamb=+25 C
RESPONSE TIME FOR VARIOUS INPUT
OVERDRIVES- NEGATIVE TRANSITION
5.1kΩ
INPUT
VOLTAGE
(mV)
OUTPUT
VOLTAGE
(V) 0.5 1 1.5 2
TIME (μs)
Input overdrive: 100mV
20mV
5mV
Tamb= +25 C
RESPONSE TIME FOR VARIOUS INPUT
OVERDRIVES- POSITIVE TRANSITION
LM2903CC =5V
15kΩ(ref) (ref)
1/2
LM2903
TYPICAL APPLICATIONS
BASIC COMPARATOR
100kΩ(ref)(ref)
1/2
LM2903 &
DRIVING CMOS
10kΩ(ref)(ref)
1/2
LM2903
DRIVING TTL
15kΩo
0.5μF100kΩI
1kΩ= 100V
1/2
LM2903
LOW FREQUENCY OP AMP
15kΩ
0.5μF
100kΩI
1kΩ A= 100V 2222=0Vfore= 0V)Io
1/2LM2903
LOW FREQUENCY OP AMP
10kΩ
20MΩ
3kΩMagnetic pick-up
1/2LM2903
10kΩ
TRANSDUCER AMPLIFIER
LM2903~ 2N2222100kΩ
1kΩ
1MΩ
100kΩ
1MΩ
Offset Adjust RI 15kΩ
0.5μF
1/2
LM2903
LOW FREQUENCY OP AMP WITH OFFSET
ADJUST
100kΩ
10kΩ
20MΩ
5.1kΩ
1N4148
1/2
LM2903
5.1kΩ
5.1kΩ100kΩ
ZERO CROSSING DETECTOR
(SINGLE POWER SUPPLY)CC
Output1
Output2CC100kΩ
3kΩ
5.1kΩCC/2CC/2
0.01μF
500pF100kΩ
0.1μF
20kΩ
50kΩ
Frequencycontrolvoltage input
vcontrolCC =+30V
+250mVV control +50V
700Hzf 100kHzo
1/2
LM2903 1/2LM2903
1/2
LM2903
20kΩ
3kΩ
TWO DECADES HIGH FREQUENCY VCO
10kΩI~
2RS
V(ref)
high
2RS
V(ref)
low 2222
(12V)VCC
Lamp
1/2LM2903
1/2
LM2903
LIMIT COMPARATOR
2kΩ
0.1μF
200kΩ= 100kHz 15VVCCCC
100kΩ
1/2
LM2903
200kΩ
CRYSTAL CONTROLLED OSCILLATOR

Partno	Mfg	Dc	Qty	Available	Descript
LM2903P	TEXAS	N/a	25	avai	Low power dual voltage comparators