LM293供应商报价哪里找芯片批发报价原理和应用中文资料-中国IC网-芯三七

当前位置：IC37首页_>L字母起始型号索引_>L字母起始型号索引第456页更新时间：2025-01-14 15:35:04

产品型号LM293的概述

LM293芯片概述 LM293是一种双比较器集成电路，通常用于信号处理和控制系统。它属于Texas Instruments（德州仪器）公司生产的一系列比较器芯片之一。LM293的设计旨在处理模拟信号，特别适用于需要快速响应和低功耗的应用。该芯片具有两个独立的比较器，可以同时处理两个信号，进行比较，并根据设定的阈值输出相应的结果，因此在各种电子电路中具有广泛的应用。 LM293的工作电压范围为2V至36V，具有出色的输入共模电压范围，使其能够在多个供电电压下稳定工作。此外，LM293的输出为开集电极型，可轻松与其他逻辑电平相连接，这使得它在设计时具有较大的灵活性。 LM293详细参数以下是LM293的主要参数： 1. 工作电源电压：典型值为2V至36V，绝对最大值为40V。 2. 输入共模范围：可以低于负电源电压（地），即使在最小电源电压下，输入也能够处理负电位。 3. 输出电流：最大...

产品型号LM293的Datasheet PDF文件预览

August 2002

LM193/LM293/LM393/LM2903

Low Power Low Offset Voltage Dual Comparators

General Description

Advantages

n High precision comparators

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.

n Reduced V_OSdrift 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:

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

of supply voltage

n Low input biasing current:

n Low input offset current:

n Maximum offset voltage:

n Input common-mode voltage range includes ground

n Differential input voltage range equal to the power

supply voltage

1.0V to 18V

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.

25 nA

5 nA

3 mV

The LM393 and LM2903 parts are available in National’s

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

bumps.

n Low output saturation voltage,:

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

and CMOS logic systems

250 mV at 4 mA

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

00570946

Top View

www.national.com

Absolute Maximum Ratings (Note 10)

LM193/LM193A

−55˚C to +125˚C

−40˚C to +85˚C

−65˚C to +150˚C

LM2903

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Storage Temperature Range

Lead Temperature

Supply Voltage, V⁺

36V

(Soldering, 10 seconds)

Soldering Information

Dual-In-Line Package

Soldering (10 seconds)

Small Outline Package

Vapor Phase (60 seconds)

Infrared (15 seconds)

+260˚C

Differential Input Voltage (Note 8)

Input Voltage

−0.3V to +36V

50 mA

Input Current (V_IN−0.3V) (Note 3)

260˚C

215˚C

Power Dissipation (Note 1)

Molded DIP

780 mW

660 mW

510 mW

568mW

Metal Can

220˚C

Small Outline Package

micro SMD Pacakge

Output Short-Circuit to Ground

(Note 2)

See AN-450 “Surface Mounting Methods and Their Effect

on Product Reliability” for other methods of soldering

surface mount devices.

Continuous

ESD rating

Operating Temperature Range

LM393

(1.5 kΩ in series with 100 pF)

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

Typ

Units

Min

Max

2.0

Input Offset Voltage

Input Bias Current

(Note 9)

_IN(+) or I_IN(−) with Output In Linear

Range, V_CM= 0V (Note 5)

_IN(+)−I_IN(−) V_CM= 0V

V+ = 30V (Note 6)

1.0

100

Input Offset Current

Input Common Mode

Voltage Range

3.0

V⁺−1.5

∞

R_L=

Supply Current

V⁺=5V

V⁺=36V

0.4

2.5

Voltage Gain

R_L≥15 kΩ, V⁺=15V

200

V/mV

V_O= 1V to 11V

Large Signal Response

Time

_IN=TTL Logic Swing, V_REF=1.4V

_RL=5V, R_L=5.1 kΩ

300

Response Time

_RL=5V, R_L=5.1 kΩ (Note 7)

_IN(−)=1V, V_IN(+)=0, V_O≈1.5V

_IN(−)=1V, V_IN(+)=0, I_SINK≤4 mA

_IN(−)=0, V_IN(+)=1V, V_O=5V

1.3

µs

Output Sink Current

Saturation Voltage

Output Leakage Current

6.0

250

0.1

400

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

Input Bias Current

(Note 9)

_IN(+) or I_IN(−) with Output In

Linear Range, V_CM= 0V (Note 5)

_IN(+)−I_IN(−) V_CM= 0V

V+ = 30V (Note 6)

1.0

5.0

1.0

5.0

2.0

7.0

100

250

Input Offset Current

Input Common Mode

Voltage Range

3.0

5.0

V+−1.5

www.national.com

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

V⁺=36V

0.4

1.0

2.5

Voltage Gain

R_L≥15 kΩ, V⁺=15V

50 200

25 100

V/mV

V_O= 1V to 11V

Large Signal Response

Time

_IN=TTL Logic Swing, V_REF=1.4V

_RL=5V, R_L=5.1 kΩ

300

Response Time

_RL=5V, R_L=5.1 kΩ (Note 7)

_IN(−)=1V, V_IN(+)=0, V_O≤1.5V

_IN(−)=1V, V_IN(+)=0, I_SINK≤4 mA

_IN(−)=0, V_IN(+)=1V, V_O=5V

1.3

1.5

µs

Output Sink Current

Saturation Voltage

Output Leakage Current

6.0 16

250 400

0.1

250 400

0.1

250 400

0.1

Electrical Characteristics

(V+ = 5V) (Note 4)

Parameter

Conditions

LM193A

Typ

Units

Min

Max

4.0

Input Offset Voltage

Input Offset Current

Input Bias Current

(Note 9)

_IN(+)−I_IN(−), V_CM=0V

_IN(+) or I_IN(−) with Output in Linear Range,

_CM=0V (Note 5)

100

300

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

1.0

µA

Output Leakage Current

Differential Input Voltage

_IN(−)=0, V_IN(+)=1V, V_O=30V

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

Input Offset Current

Input Bias Current

(Note 9)

_IN(+)−I_IN(−), V_CM=0V

100

300

150

400

200

500

_IN(+) or I_IN(−) with Output in

200

Linear Range, V_CM=0V

(Note 5)

Input Common Mode

Voltage Range

V⁺=30V (Note 6)

V⁺−2.0

700

V⁺−2.0

700

V⁺−2.0

700

Saturation Voltage

V_IN(−)=1V, V_IN(+)=0,

400

I_SINK≤4 mA

Output Leakage Current

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

_IN(−)=0, V_IN(+)=1V, V_O=30V

1.0

µA

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 ≤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

www.national.com

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

−25˚C≤T ≤+85˚C and the LM393 temperature specifications are limited to 0˚C≤T ≤+70˚C. The LM2903 is limited to −40˚C≤T ≤+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 output so

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 .1.4V, R =0Ω 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.

Ordering Information

Package

Temperature Range

Part Number

NSC Drawing

LM193H

LM193H/883

LM193H-MLS

LM193AH-MLS

−55˚C to 125˚C

8-Pin Metal Can

LM193AH-QMLV

LM193AH

H08C

LM193AH/883

LM293H

−25˚C to 85˚C

0˚C to 70˚C

LM393H

LM193J/883

LM193AJ/883

8-Pin Ceramic DIP

8-Pin Molded DIP

8-Pin SOIC

−55˚C to 125˚C

J08A

N08E

M08A

LM193AJ-QMLV

LM193AJ-MLS

LM393N

0˚C to 70˚C

−40˚C to 85˚C

LM2903N

LM393M

0˚C to 70˚C

−40˚C to 85˚C

0˚C to 70˚C

LM393MX

LM2903M

LM2903MX

LM393TL

LM393TLX

LM2903ITL

LM2903ITLX

8-Bump (12 mils)

micro SMD

TLA08AAA

−40˚C to 85˚C

Note: Also available per LM38510/11202

Note:

See STD Mil DWG 5962-94526

www.national.com

Typical Performance Characteristics LM193/LM293/LM393, LM193A

Supply Current

Input Current

00570925

00570926

Response Time for Various Input Overdrives—Negative

Transition

Output Saturation Voltage

00570928

00570927

Response Time for Various Input Overdrives—Positive

Transition

00570929

www.national.com

Typical Performance Characteristics LM2903

Supply Current

Input Current

00570931

00570930

Response Time for Various Input Overdrives—Negative

Transition

Output Saturation Voltage

00570933

00570932

Response Time for Various Input Overdrives—Positive

Transition

00570934

www.national.com

Application Hints

The LM193 series are high gain, wide bandwidth devices

which, like most comparators, can easily oscillate if the

output lead is inadvertently allowed to capacitively couple to

the inputs via stray capacitance. This shows up only during

the output voltage transition intervals as the comparator

change states. Power supply bypassing is not required to

solve this problem. Standard PC board layout is helpful as it

reduces stray input-output coupling. Reducing the input re-

The differential input voltage may be larger than V⁺without

damaging the device (Note 8). Protection should be provided

to prevent the input voltages from going negative more than

−0.3 V_DC(at 25˚C). An input clamp diode can be used as

shown in the applications section.

The output of the LM193 series is the uncommitted collector

of a grounded-emitter NPN output transistor. Many collectors

can be tied together to provide an output OR’ing function. An

output pull-up resistor can be connected to any available

power supply voltage within the permitted supply voltage

range and there is no restriction on this voltage due to the

magnitude of the voltage which is applied to the V⁺terminal

of the LM193 package. The output can also be used as a

simple SPST switch to ground (when a pull-up resistor is not

used). The amount of current which the output device can

sink is limited by the drive available (which is independent of

V⁺) and the β of this device. When the maximum current limit

is reached (approximately 16mA), the output transistor will

come out of saturation and the output voltage will rise very

rapidly. The output saturation voltage is limited by the ap-

proximately 60Ω r_SATof the output transistor. The low offset

voltage of the output transistor (1.0mV) allows the output to

clamp essentially to ground level for small load currents.

sistors to

10 kΩ reduces the feedback signal levels and

finally, adding even a small amount (1.0 to 10 mV) of positive

feedback (hysteresis) causes such a rapid transition that

oscillations due to stray feedback are not possible. Simply

socketing the IC and attaching resistors to the pins will cause

input-output oscillations during the small transition intervals

unless hysteresis is used. If the input signal is a pulse

waveform, with relatively fast rise and fall times, hysteresis is

not required.

All input pins of any unused comparators should be tied to

the negative supply.

The bias network of the LM193 series establishes a drain

current which is independent of the magnitude of the power

supply voltage over the range of from 2.0 V_DCto 30 V_DC

It is usually unnecessary to use a bypass capacitor across

the power supply line.

Typical Applications (V⁺=5.0 V_DC

)

Basic Comparator

Driving CMOS

Driving TTL

00570935

00570937

00570936

Squarewave Oscillator

Pulse Generator

Crystal Controlled Oscillator

00570938

00570940

00570939

* For large ratios of R1/R2,

D1 can be omitted.

www.national.com

Typical Applications (V⁺=5.0 V_DC) (Continued)

Two-Decade High Frequency VCO

00570941

= +30 V

+250 mV

≤ V ≤ +50 V

C DC

700Hz ≤ f ≤ 100kHz

Basic Comparator

Non-Inverting Comparator with Hysteresis

00570906

00570909

Inverting Comparator with Hysteresis

Output Strobing

00570910

00570911

www.national.com

Typical Applications (V⁺=5.0 V_DC) (Continued)

AND Gate

OR Gate

00570913

00570912

Large Fan-in AND Gate

Limit Comparator

00570915

00570914

Comparing Input Voltages of Opposite Polarity

ORing the Outputs

00570916

00570917

www.national.com

Typical Applications (V⁺=5.0 V_DC) (Continued)

Zero Crossing Detector (Single Power Supply)

One-Shot Multivibrator

00570921

00570922

Bi-Stable Multivibrator

One-Shot Multivibrator with Input Lock Out

00570924

00570923

Zero Crossing Detector

Comparator With a Negative Reference

00570944

00570943

www.national.com

Typical Applications (V⁺=5.0 V_DC) (Continued)

Time Delay Generator

00570907

Split-Supply Applications (V⁺=+15 V_DCand V⁻=−15 V_DC

)

MOS Clock Driver

00570942

www.national.com

Physical Dimensions inches (millimeters) unless otherwise noted

Metal Can Package (H)

NS Package Number H08C

Ceramic Dual-In-Line Package

NS Package Number J08A

www.national.com

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

SOIC Package

NS Package Number M08A

Molded Dual-In-Line Package (N)

NS Package N08E

www.national.com

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

NOTE: UNLESS OTHERWISE SPECIFIED

1. EPOXY COATING

2. 63Sn/37Pb EUTECTIC BUMP

3. RECOMMEND NON-SOLDER MASK DEFINED LANDING PAD.

4. PIN A1 IS ESTABLISHED BY LOWER LEFT CORNER WITH RESPECT TO TEXT ORIENTATION REMAINING PINS ARE NUMBERED

COUNTERCLOCKWISE.

5. XXX IN DRAWING NUMBER REPRESENTS PACKAGE SIZE VARIATION WHERE X IS PACKAGE WIDTH, X IS PACKAGE LENGTH AND X IS

PACKAGE HEIGHT.

6. REFERENCE JEDEC REGISTRATION MO-211, VARIATION BC.

8-Bump (12 mil) micro SMD Package

NS Package TLA08AAA

X₁= 1.514mm X₂= 1.514mm X₃= 0.600mm

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL

COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or

systems which, (a) are intended for surgical implant

into the body, or (b) support or sustain life, and

whose failure to perform when properly used in

accordance with instructions for use provided in the

labeling, can be reasonably expected to result in a

significant injury to the user.

2. A critical component is any component of a life

support device or system whose failure to perform

can be reasonably expected to cause the failure of

the life support device or system, or to affect its

safety or effectiveness.

National Semiconductor

Corporation

Americas

National Semiconductor

Europe

National Semiconductor

Asia Pacific Customer

Response Group

Tel: 65-2544466

Fax: 65-2504466

National Semiconductor

Japan Ltd.

Tel: 81-3-5639-7560

Fax: 81-3-5639-7507

Fax: +49 (0) 180-530 85 86

Email: support@nsc.com

Email: europe.support@nsc.com

Deutsch Tel: +49 (0) 69 9508 6208

English Tel: +44 (0) 870 24 0 2171

Français Tel: +33 (0) 1 41 91 8790

Email: ap.support@nsc.com

www.national.com

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

LM293相关文章

Fatal error

/www/wwwroot/website_ic37/s.ic37.com/index.php

504

电子百科

产品导航

产品型号LM293的概述

产品型号LM293的Datasheet PDF文件预览

LM293相关产品..

LM293相关文章