LM2903.pdf

August 2002

LM193/LM293/LM393/LM2903

Low Power Low Offset Voltage Dual Comparators

General Description

The LM193 series consists of two independent precision

voltage comparators with an offset voltage specification as

low as 2.0 mV max for two comparators which were de-

signed specifically to operate from a single power supply

over a wide range of voltages. Operation from split power

supplies is also possible and the low power supply current

drain is independent of the magnitude of the power supply

voltage. These comparators also have a unique characteris-

tic in that the input common-mode voltage range includes

ground, even though operated from a single power supply

voltage.

Application areas include limit comparators, simple analog to

digital converters; pulse, squarewave and time delay gen-

erators; wide range VCO; MOS clock timers; multivibrators

and high voltage digital logic gates. The LM193 series was

designed to directly interface with TTL and CMOS. When

operated from both plus and minus power supplies, the

LM193 series will directly interface with MOS logic where

their low power drain is a distinct advantage over standard

comparators.

The LM393 and LM2903 parts are available in National’s

innovative thin micro SMD package with 8 (12 mil) large

bumps.

Advantages

n High precision comparators

n Reduced V OS drift over temperature

n Eliminates need for dual supplies

n Allows sensing near ground

n Compatible with all forms of logic

n Power drain suitable for battery operation

Features

n Wide supply

— Voltage range: 2.0V to 36V

— Single or dual supplies: ± 1.0V to ± 18V

n Very low supply current drain (0.4 mA) — independent

of supply voltage

n Low input biasing current: 25 nA

n Low input offset current: ± 5nA

n Maximum offset voltage: ± 3mV

n Input common-mode voltage range includes ground

n Differential input voltage range equal to the power

supply voltage

n Low output saturation voltage,: 250 mV at 4 mA

n Output voltage compatible with TTL, DTL, ECL, MOS

and CMOS logic systems

n Available in the 8-Bump (12 mil) micro SMD package

n See AN-1112 for micro SMD considerations

Squarewave Oscillator

Non-Inverting Comparator with Hysteresis

00570909

00570938

DS005709

www.national.com

Schematic and Connection Diagrams

00570902

Metal Can Package

Dual-In-Line/SOIC Package

00570901

00570903

micro SMD

micro SMD Marking

00570945

Top View

00570946

Top View

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Absolute Maximum Ratings (Note 10)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage, V +

LM193/LM193A

−55˚C to +125˚C

LM2903

−40˚C to +85˚C

Storage Temperature Range

−65˚C to +150˚C

36V

Lead Temperature

(Soldering, 10 seconds)

+260˚C

Differential Input Voltage (Note 8)

36V

Soldering Information

Dual-In-Line Package

Soldering (10 seconds)

Input Voltage

−0.3V to +36V

Input Current (V IN < −0.3V) (Note 3)

50 mA

260˚C

Power Dissipation (Note 1)

Molded DIP

Small Outline Package

215˚C

780 mW

Vapor Phase (60 seconds)

Infrared (15 seconds) 220˚C

See AN-450 “Surface Mounting Methods and Their Effect

on Product Reliability” for other methods of soldering

surface mount devices.

ESD rating

(1.5 k Ω in series with 100 pF)

Metal Can

660 mW

Small Outline Package

510 mW

micro SMD Pacakge

568mW

Output Short-Circuit to Ground

(Note 2)

Continuous

Operating Temperature Range

LM393

1300V

0˚C to +70˚C

LM293

−25˚C to +85˚C

Electrical Characteristics

(V + =5V, T A = 25˚C, unless otherwise stated)

Parameter

Conditions

LM193A

Units

Min

Typ Max

Input Offset Voltage

(Note 9)

1.0

2.0

Input Bias Current

I IN (+) or I IN (−) with Output In Linear

100

Range, V CM = 0V (Note 5)

Input Offset Current

I IN (+)−I IN (−) V CM = 0V

3.0

Input Common Mode

V+ = 30V (Note 6)

V + −1.5

Voltage Range

Supply Current

R L = ∞

V + =5V

0.4

V + =36V

2.5

Voltage Gain

R L ≥

15 k

Ω

,V + =15V

200

V/mV

V O =1Vto11V

Large Signal Response

V IN =TTL Logic Swing, V REF =1.4V

300

Time

V RL =5V, R L =5.1 k Ω

Response Time

V RL =5V, R L =5.1 k

Ω

(Note 7)

1.3

µs

Output Sink Current

V IN (−)=1V, V IN (+)=0, V O ≈

1.5V

6.0

Saturation Voltage

V IN (−)=1V, V IN (+)=0, I SINK ≤

4 mA

250

400

Output Leakage Current

V IN (−)=0, V IN (+)=1V, V O =5V

0.1

Electrical Characteristics

(V + =5V, T A = 25˚C, unless otherwise stated)

Parameter

Conditions

LM193 LM293, LM393 LM2903 Units

Min Typ Max Min Typ Max Min Typ Max

Input Offset Voltage

(Note 9)

1.0 5.0

2.0 7.0

Input Bias Current

I IN (+) or I IN (−) with Output In

25 100

25 250

Linear Range, V CM = 0V (Note 5)

Input Offset Current

I IN (+)−I IN (−) V CM = 0V

3.0

5.0

Input Common Mode

V+ = 30V (Note 6)

V+−1.5 0

V+−1.5

Voltage Range

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Electrical Characteristics (Continued)

(V + =5V, T A = 25˚C, unless otherwise stated)

Parameter

Conditions

LM193 LM293, LM393 LM2903 Units

Min Typ Max Min Typ Max Min Typ Max

Supply Current

R L = ∞

V + =5V

0.4

0.4 1.0

V + =36V

2.5

Voltage Gain

R L ≥

15 k

Ω

,V + =15V

50 200

25 100

V/mV

V O =1Vto11V

Large Signal Response V IN =TTL Logic Swing, V REF =1.4V

300

Time

V RL =5V, R L =5.1 k

Ω

Response Time

V RL =5V, R L =5.1 k

Ω

(Note 7)

1.3

1.5

µs

Output Sink Current

V IN (−)=1V, V IN (+)=0, V O ≤

1.5V

6.0 16

Saturation Voltage

V IN (−)=1V, V IN (+)=0, I SINK ≤

4 mA

250 400

Output Leakage Current V IN (−)=0, V IN (+)=1V, V O =5V

0.1

Electrical Characteristics

(V+ = 5V) (Note 4)

Parameter

Conditions

LM193A

Units

Min Typ Max

Input Offset Voltage

(Note 9)

4.0

Input Offset Current

I IN(+) −I IN(−) ,V CM =0V

100

Input Bias Current

I IN (+) or I IN (−) with Output in Linear Range,

300

V CM =0V (Note 5)

Input Common Mode

Voltage Range

V + =30V (Note 6)

V + −2.0

Saturation Voltage

V IN (−)=1V, V IN (+)=0, I SINK

≤

4 mA

700

Output Leakage Current

V IN (−)=0, V IN(+) =1V, V O =30V

1.0

µA

Differential Input Voltage

Keep All V IN ’s

≥

0V (or V − , if Used), (Note 8)

Electrical Characteristics

(V+ = 5V) (Note 4)

Parameter

Conditions

LM193

LM293, LM393

LM2903

Units

Min Typ Max Min Typ Max Min Typ Max

Input Offset Voltage

(Note 9)

Input Offset Current

I IN(+) −I IN(−) ,V CM =0V

100

150

200

Input Bias Current

I IN (+) or I IN (−) with Output in

Linear Range, V CM =0V

(Note 5)

300

400

200

500

Input Common Mode

Voltage Range

V + =30V (Note 6)

V + −2.0 0

V + −2.0

Saturation Voltage

V IN (−)=1V, V IN (+)=0,

I SINK ≤

700

400

700

4mA

Output Leakage Current V IN (−)=0, V IN(+) =1V, V O =30V

1.0

µA

Differential Input Voltage Keep All V IN ’s ≥ 0V (or V − ,if

Used), (Note 8)

Note 1: For operating at high temperatures, the LM393 and LM2903 must be derated based on a 125˚C maximum junction temperature and a thermal resistance

of 170˚C/W which applies for the device soldered in a printed circuit board, operating in a still air ambient. The LM193/LM193A/LM293 must be derated based on

a 150˚C maximum junction temperature. The low bias dissipation and the “ON-OFF” characteristic of the outputs keeps the chip dissipation very small (P D ≤

100 mW),

provided the output transistors are allowed to saturate.

Note 2: Short circuits from the output to V + can cause excessive heating and eventual destruction. When considering short circuits to ground, the maximum output

current is approximately 20 mA independent of the magnitude of V + .

Note 3: This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP

transistors becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action

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Electrical Characteristics (Continued)

on the IC chip. This transistor action can cause the output voltages of the comparators to go to the V + voltage level (or to ground for a large overdrive) for the time

duration that an input is driven negative. This is not destructive and normal output states will re-establish when the input voltage, which was negative, again returns

to a value greater than −0.3V.

Note 4: These specifications are limited to −55˚C

T A ≤

+125˚C, for the LM193/LM193A. With the LM293 all temperature specifications are limited to

+85˚C.

Note 5: The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the outputso

no loading change exists on the reference or input lines.

Note 6: The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3V. The upper end of the common-mode

voltage range is V + −1.5V at 25˚C, but either or both inputs can go to 36V without damage, independent of the magnitude of V + .

Note 7: The response time specified is for a 100 mV input step with 5 mV overdrive. For larger overdrive signals 300 ns can be obtained, see typical performance

characteristics section.

Note 8: Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the common-mode range, the

comparator will provide a proper output state. The low input voltage state must not be less than −0.3V (or 0.3V below the magnitude of the negative power supply,

if used).

Note 9: At output switch point, V O . 1.4V, R S =0

≤

+85˚C and the LM393 temperature specifications are limited to 0˚C

≤

T A ≤

+70˚C. The LM2903 is limited to −40˚C

≤

T A ≤

with V + from 5V to 30V; and over the full input common-mode range (0V to V + −1.5V), at 25˚C.

Note 10: Refer to RETS193AX for LM193AH military specifications and to RETS193X for LM193H military specifications.

Ω

Ordering Information

Package

Temperature Range

Part Number

NSC Drawing

LM193H *

−55˚C to 125˚C

LM193H/883

LM193H-MLS

LM193AH-MLS

LM193AH-QMLV **

LM193AH

LM193AH/883

8-Pin Metal Can

H08C

−25˚C to 85˚C

LM293H

0˚C to 70˚C

LM393H

LM193J/883 *

8-Pin Ceramic DIP

−55˚C to 125˚C

LM193AJ/883

LM193AJ-QMLV **

LM193AJ-MLS

J08A

8-Pin Molded DIP

0˚C to 70˚C

LM393N

N08E

−40˚C to 85˚C

LM2903N

0˚C to 70˚C

LM393M

LM393MX

8-Pin SOIC

M08A

LM2903M

LM2903MX

−40˚C to 85˚C

0˚C to 70˚C

LM393TL

8-Bump (12 mils)

micro SMD

LM393TLX

TLA08AAA

LM2903ITL

LM2903ITLX

−40˚C to 85˚C

Note: * Also available per LM38510/11202

Note: ** See STD Mil DWG 5962-94526

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≤

−25˚C

T A ≤

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