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LM211, LM311
Single Comparators
The ability to operate from a single power supply of 5.0 V to 30 V or
$15 V split supplies, as commonly used with operational amplifiers,
makes the LM211/LM311 a truly versatile comparator. Moreover, the
inputs of the device can be isolated from system ground while the
output can drive loads referenced either to ground, the VCC or the VEE
supply. This flexibility makes it possible to drive DTL, RTL, TTL, or
MOS logic. The output can also switch voltages to 50 V at currents to
50 mA, therefore, the LM211/LM311 can be used to drive relays,
lamps or solenoids.
Features
• These Devices are Pb−Free and are RoHS Compliant
3.0 k VCC
5.0 k
5
2 + 6 87
Inputs 3 −
1
RL
Inputs
Output
4
VEE
Split Power Supply with Offset Balance
VCC
28
+
7
3
-
1
VEE 4
RL
Output
Single Supply
2
Inputs 3
VCC
+8 7
−1
4 RL
Output
VEE
Input polarity is reversed when
GND pin is used as an output.
Ground−Referred Load
VCC
Inputs
2+ 8
7
3− 1
4 RL
Output
VEE
Input polarity is reversed when
GND pin is used as an output.
Load Referred to Negative Supply
VCC
VCC
2+
Inputs 3 −
4
8
7
1
RL
Output
VEE
Load Referred to Positive Supply
Inputs
2+ 8
3−
6
4
VEE
7
1
RL
Output
TTL Strobe
1.0 k
Strobe Capability
Figure 1. Typical Comparator Design Configurations
© Semiconductor Components Industries, LLC, 2012
August, 2012 − Rev. 6
1
8
1
8
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MARKING
DIAGRAMS
PDIP−8
N SUFFIX
CASE 626
8
LM311AN
AWL
YYWWG
1
SOIC−8
D SUFFIX
CASE 751
8
LMx11
ALYW
G
1
x
A
WL, L
YY, Y
WW, W
G
G
= 2 or 3
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
= Pb−Free Package
PIN CONNECTIONS
GND 1
Inputs
2
3
VEE 4
+
−
8 VCC
7 Output
6 Balance/Strobe
5 Balance
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
Publication Order Number:
LM211/D
LM211, LM311
15
10
20 mV
5.0
0
-5.0
-10
-15
0
-50
-100
0
5.0 mV
2.0 mV
VCC
Vin
*
) VO
2.0 k
VEE
VCC = +15 V
VEE = -15 V
TA = +25°C
1.0 2.0
tTLH, RESPONSE TIME (ms)
Figure 9. Response Time for
Various Input Overdrives
15 VCC
10
5.0 mV
Vin *
5.0
0
2.0 mV
) VO
2.0 k
-5.0
-10 VEE
-15 20 mV
VCC = +15 V
100 VEE = -15 V
50 TA = +25°C
0
0 1.0 2.0
tTHL, RESPONSE TIME (ms)
Figure 10. Response Time for
Various Input Overdrives
150 0.90
TA = +25°C
125 0.75
100 Power Dissipation
0.60
75 0.45
Short Circuit Current
50 0.30
25 0.15
00
0 5.0 10 15
VO, OUTPUT VOLTAGE (V)
Figure 11. Output Short Circuit Current
Characteristics and Power Dissipation
0.90
0.75
0.60
0.45
0.30
0.15
0
0
TA = -55°C
TA = +25°C
TA = +125°C
8.0 16 24 32 40 48 56
IO, OUTPUT CURRENT (mA)
Figure 12. Output Saturation Voltage
versus Output Current
100
VCC = +15 V
VEE = -15 V
10
1.0 Output VO = +50 V (LM211 only)
0.1
0.01
25
45 65 85 105
TA, TEMPERATURE (°C)
Figure 13. Output Leakage Current
versus Temperature
125
3.6
TA = +25°C
3.0
Positive Supply - Output Low
2.4
1.8
Positive and Negative Power Supply - Output H igh
1.2
0.6
0
0 5.0 10 15 20 25 30
VCC-VEE, POWER SUPPLY VOLTAGE (V)
Figure 14. Power Supply Current
versus Supply Voltage
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