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DQualified for Automotive Applications
DFast Response Times
DStrobe Capability
DMaximum Input Bias Current . . . 150 nA
DMaximum Input Offset Current . . . 20 nA
DCan Operate From Single 5-V Supply
description/ordering information
The LM211 is a single high-speed voltage comparator. This device is designed to operate from a wide range
of power-supply voltages, including ±15-V supplies for operational amplifiers and 5-V supplies for logic systems.
The output levels are compatible with most TTL and MOS circuits. This comparator is capable of driving lamps
or relays and switching voltages up to 50 V at 50 mA. All inputs and outputs can be isolated from system ground.
The outputs can drive loads referenced to ground, VCC+, or VCC−. Offset balancing and strobe capabilities are
available, and the outputs can be wire-OR connected. If the strobe is low, the output is in the off state, regardless
of the differential input.
ORDERING INFORMATION{
TAVIO max
AT 25°CPACKAGE†ORDERABLE
PART NUMBER TOP-SIDE
MARKING
−40°C to 125°C3 mV SOIC (D) Reel of 2500 LM211QDRQ1 LM211Q1
†For the most current package and ordering information, see the Package Option Addendum at the end of this document,
or see the TI web site at http://www.ti.com.
‡Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.
functional block diagram
BAL/STRB
COL OUT
IN−
IN+
BALANCE
EMIT OUT
+
−
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2008, Texas Instruments Incorporated
!"# $"%&! '#(
'"! ! $#!! $# )# # #* "#
'' +,( '"! $!#- '# #!#&, !&"'#
#- && $##(
1
2
3
4
8
7
6
5
EMIT OUT
IN+
IN−
VCC−
VCC+
COL OUT
BAL/STRB
BALANCE
D PACKAGE
(TOP VIEW)
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schematic
All resistor values shown are nominal.
BAL/STRB BALANCE
IN+
IN−
450 Ω450 Ω
2.4
kΩ
1.2 kΩ
70 Ω
2.4
kΩ
1.2 kΩ
60 Ω
400 Ω
450 Ω
2 kΩ
200 Ω250 Ω
600 Ω
130 Ω
4 Ω
4 kΩ
VCC+
VCC−
EMIT OU
T
COL OUT
750 Ω600 Ω
Component Count
Resistors 20
Diodes 2
EPI FET 1
Transistors 22
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absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage: VCC+ (see Note 1) 18 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VCC− (see Note 1) −18 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VCC+ − VCC− 36 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential input voltage, VID (see Note 2) ±30 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI (either input) (see Notes 1 and 3) ±15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage from emitter output to VCC− 30 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage from collector output to VCC− 50 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Duration of output short circuit (see Note 4) 10 s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θJA (see Notes 5 and 6) 97°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating virtual junction temperature, TJ 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg −65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values, unless otherwise noted, are with respect to the midpoint between VCC+ and VCC−.
2. Differential voltages are at IN+ with respect to IN−.
3. The magnitude of the input voltage must never exceed the magnitude of the supply voltage or ±15 V, whichever is less.
4. The output may be shorted to ground or either power supply.
5. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) − TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
6. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN MAX UNIT
VCC+ − VCC− Supply voltage 3.5 30 V
VIInput voltage (|VCC±| ≤15 V) VCC−+0.5 VCC+−1.5 V
TAOperating free-air temperature range −40 125 °C
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electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted)
PARAMETER TEST CONDITIONS TA†MIN TYP‡MAX UNIT
VIO
Input offset voltage
See Note 7
25°C 0.7 3
mV
VIO Input offset voltage See Note 7 Full range 4mV
IIO
Input offset current
See Note 7
25°C 4 10
nA
IIO Input offset current See Note 7 Full range 20 nA
IIB
Input bias current
VO = 1 V to 14 V
25°C 75 100
nA
IIB Input bias current VO = 1 V to 14 V Full range 150 nA
IIL(S) Low-level strobe current
(see Note 8) V(strobe) = 0.3 V, VID ≤ −10 mV 25°C −3 mA
VICR Common-mode input voltage
range Full range 13
to
−14.5
13.8
to
−14.7 V
AVD Large-signal differential voltage
amplification VO = 5 V to 35 V, RL = 1 kΩ25°C 40 200 V/mV
High-level (collector) output
I(strobe) = −3 mA, VID = 5 mV,
VOH = 35 V
25°C 0.2 10 nA
I
OH
High-level (collector) output
leakage current
I(strobe) = −3 mA, VID = 5 mV
,
VOH = 35 V Full range 0.5 µA
IOH
leakage current
VID = 5 mV, VOH = 35 V 25°C nA
IOL = 50 mA
VID = −5 mV 25°C 0.75 1.5
VOL
Low-level (collector-to-emitter)
IOL = 50 mA VID = −10 mV 25°C
V
VOL
Low-level (collector-to-emitter)
output voltage
VCC+ = 4.5 V, VCC− = 0,
VID = −6 mV Full range 0.23 0.4 V
output voltage
VCC+ = 4.5 V, VCC− = 0,
IOL = 8 mA VID = −10 mV Full range
ICC+ Supply current from VCC+,
output low VID = −10 mV, No load 25°C 5.1 6 mA
ICC− Supply current from VCC−,
output high VID = 10 mV, No load 25°C −4.1 −5 mA
†Unless otherwise noted, all characteristics are measured with BALANCE and BAL/STRB open and EMIT OUT grounded.
Full range for LM211Q is −40°C to 125°C.
‡All typical values are at TA = 25°C.
NOTES: 7. The offset voltages and offset currents given are the maximum values required to drive the collector output up to 14 V or down to
1 V with a pullup resistor of 7.5 kΩ to VCC+. These parameters actually define an error band and take into account the worst-case
effects of voltage gain and input impedance.
8. The strobe should not be shorted to ground; it should be current driven at −3 mA to −5 mA (see Figures 13 and 27).
switching characteristics, VCC± = ±15 V, TA = 25°C
PARAMETER TEST CONDITIONS TYP UNIT
Response time, low-to-high-level output
RC = 500 Ω to 5 V,
CL = 5 pF,
See Note 9
115 ns
Response time, high-to-low-level output
R
C
= 500
Ω
to 5 V,
C
L
= 5 pF,
See Note 9
165 ns
NOTE 9: The response time specified is for a 100-mV input step with 5-mV overdrive and is the interval between the input step function and the
instant when the output crosses 1.4 V.
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TYPICAL CHARACTERISTICS
NOTE A: Condition 1 is with BALANCE and BAL/STRB open.
Condition 2 is with BALANCE and BAL/STRB connected
to VCC+.Figure 1
10
8
4
2
0
18
6
−60 −40 −20 0 20 40 60
− Input Offset Current − nA
14
12
16
INPUT OFFSET CURRENT
vs
FREE-AIR TEMPERATURE
20
80 100 120 140
TA − Free-Air Temperature − °C
IIO
Condition 2
Condition 1
VCC± = ±15 V
VO = 1 V to 14 V
See Note A
NOTE A: Condition 1 is with BALANCE and BAL/STRB open
.
Condition 2 is with BALANCE and BAL/STRB connected
to VCC+.Figure 2
250
200
100
50
0
450
150
−60 −40 −20 0 20 40 60
− Input Bias Current − nA
350
300
400
500
80 100 120 140
IIB
INPUT BIAS CURRENT
vs
FREE-AIR TEMPERATURE
TA − Free-Air Temperature − °C
Condition 2
VCC± = ±15 V
VO = 1 V to 14 V
See Note A
Condition 1
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TYPICAL CHARACTERISTICS
30
20
10
0−1 −0.5 0
− Output Voltage − V
40
50
VOLTAGE TRANSFER CHARACTERISTICS
60
0.5 1
VO
VID − Differential Input Voltage − mV
VID
VCC+ = 30 V
1 kΩ
Output
VCC−
VI = 50 V
VID
VCC+ = 30 V
600 Ω
VCC−
Output
COLLECTOR OUTPUT TRANSFER CHARACTERISTIC
TEST CIRCUIT FOR FIGURE 3
EMITTER OUTPUT TRANSFER CHARACTERISTIC
TEST CIRCUIT FOR FIGURE 3
Collector
Output
RL = 1 kΩ
Emitter Output
RL = 600 Ω
VCC+ = 30 V
VCC− = 0
TA = 25°C
Figure 3
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TYPICAL CHARACTERISTICS
Figure 4
4
3
1
00 50 100 150 200 250
5
t − Time − ns 300 350
2
Differential
Input Voltage
− Output Voltage − VVO
OUTPUT RESPONSE FOR
VARIOUS INPUT OVERDRIVES
100 mV
20 mV
2 mV
5 mV
VCC± = ±15 V
RC = 500 Ω to 5 V
TA = 25°C
Figure 5
4
3
1
00 50 100 150 200 250
5
t − Time − ns
OUTPUT RESPONSE FOR
VARIOUS INPUT OVERDRIVES
300 350
2
Differential
Input Voltage
− Output Voltage − VVO
20 mV
5 mV 2 mV
100 mV
VCC± = ±15 V
RC = 500 Ω to 5 V
TA = 25°C
VID
VCC+ = 15 V
500 Ω
VO
VCC− = −15 V
TEST CIRCUIT FOR FIGURES 4 AND 5
5 V
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TYPICAL CHARACTERISTICS
Figure 6
5
0
−10
−15 0 0.2 0.4 0.6 0.8 1.0
10
t − Time − s
1.2 1.4
−5
Differential
Input Voltage
− Output Voltage − VVO
OUTPUT RESPONSE FOR
VARIOUS INPUT OVERDRIVES
15
1.6 1.8
20 mV
100 mV
2 mV
5 mV
VCC± = ±15 V
RE = 2 kΩ to −15 V
TA = 25°C
m
Figure 7
t − Time − s
OUTPUT RESPONSE FOR
VARIOUS INPUT OVERDRIVES
Differential
Input Voltage
− Output Voltage − VVO
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
5
0
−10
−15
10
−5
15
20 mV
VCC± = ±15 V
RE = 2 kΩ to −15 V
TA = 25°C
2 mV
5 mV
100 mV
m
VID
VCC+ = 15 V
RE = 2 kΩ
VO
VCC− = −15 V
TEST CIRCUIT FOR FIGURES 6 AND 7
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TYPICAL CHARACTERISTICS
Figure 8
60
40
20
00510
− Output Current and Dissipation − mA
80
100
120
15
IO
VCC± = ±15 V
t ≤10 s
VID = −10 mV
TA = 25°C
VO − Output Voltage − V
140
160
300
200
100
0
− Output Dissipation − mW
400
500
600
PO
700
800
OUTPUT CURRENT AND DISSIPATION
vs
OUTPUT VOLTAGE
PO (right scale)
IO (left scale)
Figure 9
3
2
1
00510
4
5
6
15
TA = 25°C
No Load
VCC+ − Positive Supply Voltage − V
VID = −10 mV
POSITIVE SUPPLY CURRENT
vs
POSITIVE SUPPLY VOLTAGE
ICC+ − Positive Supply Current − mA
VID = 10 mV
−3
−2
−1
00 −5 −10
−4
−5
−6
−15
NEGATIVE SUPPLY CURRENT
vs
NEGATIVE SUPPLY VOLTAGE
VCC− − Negative Supply Voltage − V
ICC− − Negative Supply Current − mA
VID = 10 mV or −10 mV
TA = 25°C
No Load
Figure 10
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APPLICATION INFORMATION
Figure 11 through Figure 29 show various applications for the LM211 comparator.
Figure 11. 100-kHz Free-Running Multivibrator
VCC+
39 kΩ
1200 pF
20 kΩ1 kΩ
10 kΩ
20 kΩ
Square Wave
Output
(fanout to two
Series 54 gates,
or equivalent)
NOTE: If offset balancing is not used,
the BALANCE and BAL/STRB
pins should be shorted together.
Figure 12. Offset Balancing
3 kΩ
3 kΩ
V
CC+
BALANCE BAL/
STRB
Figure 13. Strobing
1 kΩ
BAL/STRB
TTL
Strobe 2N2222
NOTE: Do not connect strobe pin
directly to ground, because the
output is turned off whenever
current is pulled from the strobe
pin.
Figure 14. Zero-Crossing Detector
VCC+
Input
VCC−
20 kΩ
Output
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APPLICATION INFORMATION
†Resistor values shown are for a 0- to 30-V logic swing and a 15-V threshold.
‡May be added to control speed and reduce susceptibility to noise spikes
5 V
1 kΩ
240 kΩ
82 kΩ
47 kΩ
82 kΩ
Output to TTL
Input†
‡
Figure 15. TTL Interface With High-Level Logic
Figure 16. Detector for Magnetic Transducer
5 V
2 kΩ
4.5 kΩ
1 kΩ
Magnetic
Transducer
Output
to TTL
Figure 17. 100-kHz Crystal Oscillator
0.1 µF50 kΩ
V
CC+ 2 kΩ
100 kΩ
100 kΩ
100 kHz
Output
10 pF
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APPLICATION INFORMATION
Figure 18. Comparator and Solenoid Driver
Input
22 kΩ
Output
VCC+
Figure 19. Strobing Both Input and Output Stages
Simultaneously
†Typical input current is 50 pA with inputs strobed off.
VCC+
1 kΩ
From D/A Network
0.1 µF
Sample
Analog
Input†
2N2222 TTL
Strobe
BAL/STRBBALANCE
Figure 20. Low-Voltage Adjustable
Reference Supply
500 Ω3.9 kΩ
10 kΩ
1.5 µF
+
V
CC+
Outpu
t
2N2222
2N3708
1 kΩ
Figure 21. Zero-Crossing Detector
Driving MOS Logic
3 kΩ
3 kΩ
VCC+ = 5 V
Input
10 kΩ
VCC− = −10 V
Output
to MOS
BAL/
STRB
BALANCE
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APPLICATION INFORMATION
†Adjust to set clamp level
3.9 kΩ
30 kن
1.5 µF
+
VCC+ = 5 V
Input
From
TTL
2N2222
2N3708
Output
510 Ω
1 kΩ1 kΩ
2N2222
2N2222
2.2 kΩ
1N914
1N914
2.7 kΩ
Figure 22. Precision Squarer
5 kΩ
0.01 µF
TTL
Output
1 kΩ
1 kΩ
1 kΩ
100 Ω
From
TTL
Gate
50 kΩ
Opto Isolator
5 V VCC+ = 5 V
Figure 23. Digital Transmission Isolator
1.5 µF
+
10 kΩ
2 kΩ
VCC+ = 15 V
TL081
Output
Input
1 MΩ
VCC− = −15 V
−
+
Figure 24. Positive-Peak Detector
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APPLICATION INFORMATION
15 µF
+
10 kΩ
1 MΩ
VCC+ = 15 V
TL081
Output
Input
VCC− = −15 V
2 kΩ+
−
Figure 25. Negative-Peak Detector
†R1 sets the comparison level. At comparison, the photodiode has less than 5 mV across it, decreasing dark current by an order of magnitude.
2N2222
2N3708
R1†
30 kΩ
3.9 kΩ
1 kΩ
Output
to TTL
VCC+ = 5 V
1N2175
Figure 26. Precision Photodiode Comparator
‡Transient voltage and inductive kickback protection
2N3708
VCC+
Inputs
TTL
Strobe VCC−
‡
1 kΩ
BAL/STRB
Figure 27. Relay Driver With Strobe
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APPLICATION INFORMATION
300 Ω
VCC+
VCC−
100 kΩOutput
100 kΩ
47 Ω
10 kΩ
620 Ω
Input
0.1 µF 300 Ω620 Ω
1
2
BAL/STRB
BAL/STRB
Figure 28. Switching Power Amplifier
V+
0.22 µF
300 kΩ
620 Ω
1
VCC−
2
VCC−
620 Ω
620 Ω
620 Ω
620 Ω
620 Ω
39 kΩ
510 Ω
510 Ω
15 kΩ
15 kΩ
39 kΩ
300 kΩ
Outputs
VCC+
Input
Reference
BAL/STRB
BAL/STRB
Figure 29. Switching Power Amplifiers
PACKAGE OPTION ADDENDUM
www.ti.com 12-Nov-2010
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
LM211QDRG4Q1 ACTIVE SOIC D 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
LM211QDRQ1 ACTIVE SOIC D 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF LM211-Q1 :
•Catalog: LM211
•Enhanced Product: LM211-EP
PACKAGE OPTION ADDENDUM
www.ti.com 12-Nov-2010
Addendum-Page 2
NOTE: Qualified Version Definitions:
•Catalog - TI's standard catalog product
•Enhanced Product - Supports Defense, Aerospace and Medical Applications
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Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video
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