October 1997
.
MAXIMUM INPUT CURRENT : 150nA
.
MAXIMUM OFFSET CURRENT : 20nA
.
DIFFERENTIAL INPUT VOLTAGE RANGE :
30V
.
POWER CONSUMPTION : 135mW AT
15V
.
SUPPLY VOLTAGE : +5V TO
15V
.
OUTPUT CURRENT : 50mA
DESCRIPTION
The LM111, LM211 and LM311 are voltage
comparators that have low input currents.
They are also designed to operateover a wide range
of supply voltages : from standard
15V operational
amplifier supplies down to the single +5V supply
used for IC logic.
Their outputis compatible with RTL-DTL and TTL as
well as MOS circuits and can switch voltages up to
+50V at output currents as high as 50mA.
ORDER CODES
Part Number
Temperature
Range
Package
N
D
LM111
55, 125
o
C
LM211
40, 105
o
C
LM311
0,
70
o
C
Example : LM311D
N
DIP8
(Plastic Package)
D
SO8
(Plastic Micropackage)
1
2
3
4
8
5
6
7
-
+
1 - Ground
2 - Non-inverting input
3 - Inverting input
4 - V
CC
-
5 - Balance
6 - Strobe/balance
7 - Output
8 - V
CC
+
PIN CONNECTIONS (top view)
LM111
LM211 - LM311
VOLTAGE COMPARATORS
1/9
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
LM111
LM211
LM311
Unit
V
CC
Supply Voltage
36
36
36
V
V
id
Differential Input Voltage
30
30
30
V
V
i
Input Voltage (note 1)
15
15
15
V
P
tot
Power Dissipation
500
mW
T
oper
Operating Free-air Temperature Range
55 to +125
40 to +105
0 to +70
o
C
T
stg
Storage Temperature Range
65 to +150
65 to +150
65 to +150
o
C
V
(14)
Ground to Negative Supply Voltage
30
30
30
V
V
(74)
Output to Negative Supply Voltage
50
50
40
V
Output short-circuit duration : 10s
LM111 : +150
o
C
Voltage at strobe pin : V
CC
+
5V
Maximum junction temperature
LM211 : +150
o
C
LM311 : +150
o
C
Note :
1. This rating applies for
15V supplies. The positive input voltage limit is 30V above the negative. The negative input voltage limit is
equal to the negative supply voltage or 30V below the positive supply, whichever is less.
R3
300
R4
300
R1
1.3 k
R2
1.3k
R5
70
Q6
S trobe/balance
Ba lance
R8
750
R9
600
Q10
Q 20
Collector output
V
C C
V
C C
Emitter output or ground
Q12
Q13
Q14
R10
4k
R11
130
Q15
R12
600
R13
4
Q16
Q11
Q19
Q18
Q8
R 16
400
Q9
R17
60
R15
450
Q21
Q22
Q17
R14
2k
R1 8
200
R19
2 50
Q2
Q23
Inverting
input
Non-inverting
input
Q1
Q4
Q3
D1
5V
D2
5V
Q7
R6
1.2k
R7
1.2k
Q5
SCHEMATIC DIAGRAM
LM111 - LM211 - LM311
2/9
ELECTRICAL CHARACTERISTICS
V
CC
=
15V, T
amb
= 25
o
C (unless otherwise specified)
Symbol
Parameter
LM111 - LM211
LM311
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
V
io
Input Offset Voltage (R
S
50k
) (note 1)
T
amb
= +25
o
C
T
min
.
T
amb
T
max
.
0.7
3
4
2
7.5
10
mV
I
io
Input Offset Current (note 1)
T
amb
= +25
o
C
T
min
.
T
amb
T
max
.
4
10
20
6
50
70
nA
I
ib
Input Bias Current (note 1)
T
amb
= +25
o
C
T
min
.
T
amb
T
max
.
60
100
150
100
250
300
nA
A
vd
Large Signal Voltage Gain
40
200
40
200
V/mV
I
CC
+
I
CC
-
Supply Currents
Positive
Negative
5.1
4.1
6
5
5.1
4.1
7.5
5
mA
V
icm
Input Common Mode Voltage Range
T
min
.
T
amb
T
max
.
-14.5
+13.8
-14.7
+13
-14.5
+13.8
-14.7
+13
V
V
OL
Low Level Output Voltage
T
amb
= +25
o
C, I
O
= 50mA V
i
-5mV
V
i
-10mV
T
min.
T
amb
T
max
.
V
CC
+
+4.5 V, V
CC
-
= 0
I
o
= 8mA
V
i
-6mV
V
i
-10mV
0.75
0.23
1.5
0.4
0.75
0.23
1.5
0.4
V
I
OH
High Level Output Current
T
amb
= +25
o
C
V
i
+ 5mV, V
O
= +35V
V
i
+10mV, V
O
= +5V
T
min
.
T
amb
T
max
.
V
i
+ 5mV, V
O
= +35V
0.2
0.1
10
0.5
0.2
50
nA
nA
A
I
strobe
Strobe Current
3
3
mA
t
re
Response Time (note 2)
200
200
ns
Notes : 1. The offset voltage, offset current and bias current specifications apply for any supply voltage from a single +5V supply up to
15V
supplies.
The offset voltages and offset currents given are the maximum values required to drive the output down to +1V or up to +14V with
a 1mA load current. Thus, these parameters define an error band and take into account the worst-case of voltage gain and input
impedance.
2. The response time specified (see definitions) is for a 100mV input step with 5mV overdrive.
LM111 - LM211 - LM311
3/9
OUTPUT
VOLTAGE
(V)
TRANSFERT CHARACTERISTICS
-1
-5
0
0.5
1
60
50
40
30
20
10
0
Ta mb = +25 C
VCC = +30 V
Norm al output
E mitter follower
output
RL = 600
RL = 1 k
VL = +50 V
DIFFERENTIAL INPUT VOLTAGE (mV)
SHORT-CIRCUIT
CURRENT
(mA)
POWER
DISSIPATION
(W)
OUTP UT LIMITING CHARACTE RISTICS
Ta mb = +25 C
Short circuit curre nt
P o
w
er d
iss
ipa
t i
on
OUTP UT VOLTAGE (V)
140
120
100
80
60
40
20
0
0
5
10
15
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
COMMON
MODE
LIMITS
(V)
CO MMON MODE LIMITS
0
10
20
30
40
50
60
70
80
V+CC
-0.5
-1
-1.5
0 .4
0 .2
V-CC
TE MPERATURE ( C)
INPUT
OFFSET
CURRENT
(
nA)
INPUT O FFS ET CURRENT
-55
-35
-15
5
25
45
65
85
105
125
30
20
10
0
VCC = 15V
Ra is e d
Norma l
TE MPERATURE ( C)
INPUT
BIAS
CURRENT
(nA)
INPUT BIAS CURRENT
400
300
200
100
0
VCC = 15V
Raised
Norma l
-55
-35
-15
5
25
45
65
85
105
125
TEMPERATURE ( C)
LM111 - LM211 - LM311
4/9
EQUIVALENT INPUT OFFS ET ERROR
LM111
LM211
Tamb = +25 C
Typica l
Maximu m
VIO = VIO + RS IID
100
10
1
0.1
INPUT RES ISTANCE (
)
EQUIVALENT
INPUT
OFFSET
VOLTAGE
(mV)
10k
1 00k
1 M
10M
EQUIVALENT INPUT OFFS ET ERROR
Tamb = +25 C
LM311
Typical
Maximum
VIO = VIO + RS IID
EQUIVALENT
INPUT
OFFSET
VOLTAGE
(mV)
10k
100k
1M
10M
INPUT RES ISTANCE (
)
100
10
SATURATION
VOLTAGE
(V)
LOW LEVEL OUTP UT S ATURATION VOLTAGE
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
LM111
LM211 > T a mb = +125 C
Ta mb = -55 C
Tamb = +25 C
OUTP UT CURENT (mA)
0
10
20
30
40
50
SATURATION
VOLTAGE
(V)
LOW LEVEL O UTPUT SATURATION VOLTAGE
O UTPUT CURRENT (mA)
LM311
Tamb = +25 C
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
10
20
30
40
50
INPUT
BIAS
CURRENT
(nA)
INPUT CHARACTE RISTICS
VCC = 15V
Tamb = +25 C
DIFFERENTIALINPUT VOLTAGE (V)
-16 -12
-8
-4
0
4
8
12
16
180
160
140
120
100
80
60
40
20
0
LM111 - LM211 - LM311
5/9
PDF 
ZIP