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Fairchild Semiconductor
Fairchild Semiconductor

LM2903 Datasheet

Dual Differential Comparator


LM2903 Datasheet Preview


www.fairchildsemi.com
LM2903,LM393/LM393A,LM293A
Dual Differential Comparator
Features
• Single Supply Operation: 2V to 36V
• Dual Supply Operation: 1V to 18V
• Allow Comparison of Voltages Near Ground Potential
• Low Current Drain 800A Typ.
• Compatible with all Forms of Logic
• Low Input Bias Current 25nA Typ.
• Low Input Offset Current 5nA Typ.
• Low Offset Voltage 1mV Typ.
Description
The LM2903, LM393/LM393A, LM293A consist of two
independent voltage comparators designed to operate from a
single power supply over a wide voltage range.
8-DIP
1
8-SOIC
1
Internal Block Diagram
OUTPUT1 1
IN1 (-) 2 -
IN1 (+) 3 +
GND 4
8 VCC
7 OUTPUT2
- 6 IN2 (-)
+ 5 IN2 (+)
©2012 Fairchild Semiconductor Corporation
Rev. 2.0.2
Page 1

LM2903,LM393/LM393A,LM293A
Schematic Diagram
VCC
IN (+)
IN (-)
GND
Q9
D2
Q2
D1
Q1
D3
Q3
D4
Q4
Q5 Q6
Q12 Q14
R2
Q8
Q7
Q13
R1
OUTPUT
D5
D6
Absolute Maximum Ratings
Parameter
Power Supply Voltage
Differential Input Voltage
Input Voltage
Output Short Circuit to GND
Power Dissipation, Ta = 25C
8-DIP
8-SOIC
Operating Temperature
LM393/LM393A
LM2903
LM293A
Storage Temperature
Symbol
VCC
VI(DIFF)
VI
-
PD
TOPR
TSTG
Thermal Data
Parameter
Thermal Resistance Junction-Ambient Max.
8-DIP
8-SOIC
Symbol
Rja
Value
18 or 36
36
-0.3 to +36
Continuous
1040
480
0 ~ +70
-40 ~ +105
-25 ~ +85
-65 ~ +150
Value
120
260
Unit
V
V
V
-
mW
C
C
Unit
C/W
2
Page 2

LM2903,LM393/LM393A,LM293A
Electrical Characteristics
(VCC = 5V, TA = 25C, unless otherwise specified)
Parameter
Symbol
Conditions
LM293A/LM393A
LM393
Unit
Min. Typ. Max. Min. Typ. Max.
Input Offset
Voltage
VO(P) =1.4V, RS = 0
VIO
VCM= 0 to 1.5V Note1
- 1 2 - 1 5
mV
- - 4.0 - - 9.0
Input Offset Current IIO
Note1
- 5 50 - 5 50
nA
- - 150 - - 150
Input Bias Current IBIAS
Note1
- 65 250 - 65 250
nA
- - 400 - - 400
Input Common
Mode
Voltage Range
VI(R)
Note1
0
-
VCC
-1.5
0
-
VCC
-1.5
V
0 - VCC-2 0 - VCC-2
Supply Current
RL = VCC = 5V
ICC RL = , VCC = 30V
- 0.6 1
- 0.6 1
mA
- 0.8 2.5 - 0.8 2.5
Voltage Gain
GV
VCC =15V, RL 15k
(for large VO(P-P)swing)
50 200 -
50 200 - V/mV
Large Signal
Response Time
VI =TTL Logic Swing
TLRES VREF =1.4V, VRL = 5V,
RL = 5.1k
- 350 -
- 350 - nS
Response Time
TRES VRL =5V, RL =5.1k
- 1.4 -
- 1.4 - S
Output Sink Current ISINK
VI(-) 1V, VI(+) =0V,
VO(P) 1.5V
6 18 -
6 18 - mA
Output Saturation
Voltage
VI(-) 1V, VI(+) = 0V
VSAT
ISINK = 4mA Note1
- 160 400 - 160 400
mV
- - 700 - - 700
Output Leakage
Current
IO(LKG)
VI(-) = 0V,
VI(+) = 1V
VO(P) = 5V - 0.1 -
- 0.1 - nA
VO(P) = 30V -
- 1.0 -
- 1.0 A
Note1
LM393/LM393A: 0 TA +70C
LM2903: -40 TA+105C
LM293A : -25 TA +85C
3
Page 3
Part Number LM2903
Manufactur Fairchild Semiconductor
Description Dual Differential Comparator
Total Page 8 Pages
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