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LM2903,LM393/LM393A,LM293A
Dual Differential Comparator

Features

Description

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The LM2903, LM393/LM393A, LM293A consist of two
independent voltage comparators designed to operate from a
single power supply over a wide voltage range.

Single Supply Operation: 2V to 36V
Dual Supply Operation: ±1V to ±18V
Allow Comparison of VoltagesNear Ground Potential
Low Current Drain 800μA Typ.
Compatible with all Forms of Logic
Low Input Bias Current 25nA Typ.
Low Input Offset Current ±5nA Typ.
Low Offset Voltage ±1mV Typ.

8-DIP

1

8-SOP

1

Internal Block Diagram

OUTPUT1 1

IN1 (-)

2

IN1 (+)

3

GND

4

8

7 OUTPUT2

+

VCC

-

6

IN2 (-)

+

5

IN2 (+)

Rev. 2.0.1
©2011 FairchildSemiconductor Corporation

LM2903,LM393/LM393A,LM293A

Schematic Diagram
VCC

Q12

Q9

Q14

D3
D2

D4

Q2

Q3

R2

D1

IN (+)

Q1

Q4
OUTPUT
Q8

IN (-)

Q13
Q7
Q5

D5

Q6
R1

D6
GND

Absolute Maximum Ratings
Parameter

Symbol

Value

Unit

VCC

±18 or 36

V

VI(DIFF)

36

V

Input Voltage

VI

-0.3 to +36

V

OutputShort Circuit to GND

-

Continuous

-

PD

1040
480

mW

Power Supply Voltage
Differential Input Voltage

Power Dissipation, Ta = 25°C
8-DIP
8-SOP
Operating Temperature
LM393/LM393A
LM2903
LM293A
Storage Temperature

TOPR

0 ~ +70
-40 ~ +105
-25 ~ +85

°C

TSTG

-65 ~ +150

°C

Thermal Data
Parameter
Thermal Resistance Junction-Ambient Max.
8-DIP
8-SOP2

Symbol

Value

Unit

Rθja

120
260

°C/W

LM2903,LM393/LM393A,LM293A

Electrical Characteristics
(VCC = 5V, TA = 25°C, unless otherwise specified)
Parameter

Symbol

Input Offset
Voltage

VIO

Input Offset Current

IIO

Input Bias Current

IBIAS

Input Common
Mode
Voltage Range

VI(R)

Supply Current

ICC

Voltage Gain

GV

Large SignalResponse Time

Conditions

LM293A/LM393A

LM393

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

VO(P) =1.4V, RS = 0Ω

-

±1

±2

-

±1

±5

VCM= 0 to 1.5V Note1

-

-

±4.0

-

-

±9.0

-

±5

±50

-

±5

±50

-

-

±150

-

-

±150

-

65

250

-

65

250

-

-

400

-

-

400

0

-

VCC
-1.5

0

-VCC
-1.5

0

-

VCC-2

0

-

VCC-2

RL = ∞ , VCC = 5V

-

0.6

1

-

0.6

1

RL = ∞, VCC = 30V

-

0.8

2.5

-

0.8

2.5

VCC =15V, RL ≥ 15kΩ
(for large VO(P-P)swing)

50

200

-

50

200

-

V/mV

TLRES

VI =TTL Logic Swing
VREF =1.4V, VRL = 5V,
RL = 5.1kΩ

-

350

-

-

350

-

nS

Response Time

TRES

VRL =5V,RL =5.1kΩ

-

1.4

-

-

1.4

-

μS

Output Sink Current

ISINK

VI(-) ≥ 1V, VI(+) =0V,
VO(P) ≤1.5V

6

18

-

6

18

-

mA

Output Saturation
Voltage

VSAT

VI(-) ≥ 1V, VI(+) = 0V

-

160

400

-

160

400

ISINK = 4mA

Note1

-

-

700

-

-

700

VI(-) = 0V,
VI(+) = 1V

VO(P) = 5V

-

0.1

-

-

0.1

-

nAVO(P) = 30V

-

-

1.0

-

-

1.0

μA

Output Leakage
Current

Note1
Note1

Note1

IO(LKG)

mV
nA
nA

V

mA

mV

Note1
LM393/LM393A: 0 ≤ TA ≤ +70°C
LM2903: -40 ≤ TA ≤ +105°C
LM293A : -25 ≤ TA ≤ +85°C

3

LM2903,LM393/LM393A,LM293A

Electrical Characteristics (Continued)
(VCC = 5V, TA = 25°C, unless otherwise specified)
Parameter

Symbol

InputOffset Voltage

VIO

Input Offset Current

Conditions

Typ.

Max.

VO(P) =1.4V, RS = 0Ω

-

±1

±7

VCM= 0 to 1.5V

-

±9

±15

-

±5

±50

-

±50

±200

-

65

250

-

-

500

0

-

VCC
-1.5

0

-

VCC-2

RL = ∞, VCC = 5V

-

0.6

1

RL = ∞, VCC = 30V

-

1

2.5

25

100

-

V/mV

VI(R)

Supply Current...