LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Fast Response Times
D
Strobe Capability
D
Maximum Input Bias Current...300 nA
D
Maximum Input Offset Current...70 nA
D
Can Operate From Single 5-V Supply
D
Designed to Be Interchangeable With
National Semiconductor LM111, LM211,
and LM311
description
The LM111, LM211, and LM311 are single
high-speed voltage comparators. These devices
are 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. These
comparators are 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, V
CC+
or V
CC–
. Offset balancing and
strobe capabilities are available, and the outputs
can be wire-OR connected. If the strobe is low, the
output will be in the off state regardless of the
differential input.
The LM1 1 1 is characterized for operation over the
full military range of –55°C to 125°C. The LM21 1
is characterized for operation from –40°C to
85°C, and the LM311 is characterized for
operation from 0°C to 70°C.
functional block diagram
–
+
BAL/STRB
COL OUT
IN–
IN+
BALANCE
EMIT OUT
Copyright 1992, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
2
3
4
5
6
7
14
13
12
11
10
9
8
NC
EMIT OUT
IN+
IN–
NC
V
CC–
BALANCE
NC
NC
NC
V
CC+
NC
COL OUT
BAL/STRB
LM111...J PACKAGE
1
2
3
4
8
7
6
5
EMIT OUT
IN+
IN–
V
CC–
V
CC+
COL OUT
BAL/STRB
BALANCE
LM111...JG PACKAGE
LM211, LM311 . . . D, DB, P, OR PW PACKAGE
(TOP VIEW)
1
2
3
4
5
10
9
8
7
6
EMIT OUT
IN+
IN–
NC
V
CC–
V
CC+
COL OUT
NC
BAL/STRB
BALANCE
LM111...U PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
NC
COL OUT
NC
BAL/STRB
NC
NC
IN+
NC
IN–
NC
LM111...FK PACKAGE
(TOP VIEW)
NC
EMIT OUT
NC
BALANCE
NC
NC
NC
NC
CC–
V
CC+
V
•
(TOP VIEW)
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
AVAILABLE OPTIONS
PACKAGED DEVICES
T
A
VIOmax
at 25°C
SMALL
OUTLINE
(D)
†
SSOP
(DB)
CHIP
CARRIER
(FK)
CERAMIC
DIP
(J)
CERAMIC
DIP
(JG)
PLASTIC
DIP
(P)
TSSOP
(PW)
FLATPACK
(U)
CHIP
FORM
(Y)
0°C
to
70°C
7.5 mV LM311D LM311DBLE LM311P LM311PWLE LM311Y
–40°C
to
85°C
3 mV LM211D LM211P
–55°C
to
125°C
3 mV LM111FK LM111J LM111JG LM111U
†
The D package is available taped and reeled. Add the suffix R (e.g., LM31 1DR). The DB and PW packages are only available left-end taped and
reeled.
schematic
All resistor values shown are nominal.
BAL/STRB
BALANCE
IN+
IN–
300 Ω 300 Ω
1.3
kΩ
1.2 kΩ
70 Ω
1.3
kΩ
1.2 kΩ
60 Ω
400 Ω
450 Ω
2 kΩ
200 Ω250 Ω
600 Ω
130 Ω
4 Ω
4 kΩ
V
CC+
V
CC–
EMIT OUT
COL OUT
750 Ω 600 Ω
Component Count
Resistors 20
Diodes 2
Epifet 1
Transistors 22
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LM311Y chip information
This chip, when properly assembled, displays characteristics similar to the LM311. Thermal compression or
ultrasonic bonding may be used on the doped-aluminum bonding pads. Chips may be mounted with conductive
epoxy or a gold-silicon preform.
BONDING PAD ASSIGNMENTS
CHIP THICKNESS: 15 TYPICAL
BONDING PADS: 4 × 4 MINIMUM
TJ max = 150°C
TOLERANCES ARE ±10%.
ALL DIMENSIONS ARE IN MILS.
BAL/STRB
COL
OUT
IN–
IN+
BALANCE
EMIT
OUT
(5)
(2)
(3)
(6)
(8)
(4)
V
CC+
V
CC–
(7)
(1)
+
–
62
50
(1) (8)
(7)
(6)(5)
(4)
(3)
(2)
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC+
(see Note 1) 18 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply voltage, V
CC–
(see Note 1) –18 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply voltage, V
CC+
– V
CC–
36 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential input voltage, V
ID
(see Note 2) ±30 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
(either input, see Notes 1 and 3) ±15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage from emitter output to V
CC–
30 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage from collector output to V
CC–
: LM111 50 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LM211 50 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LM311 40 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Duration of output short circuit (see Note 4) 10 s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: LM111 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LM211 –40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LM311 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Case temperature for 60 seconds: FK package 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: J, JG, or U package 300°C. . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: D, DB, P, or PW package 260°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 V
CC+
and V
CC–
.
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.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING
FACTOR
DERATE
ABOVE T
A
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
TA = 125°C
POWER RATING
D 500 mW 5.8 mW/°C 64°C 464 mW 377 mW –
DB or PW 500 mW 4.2 mW/°C31°C 336 mW – –
FK 500 mW 11.0 mW/°C 105°C 500 mW 500 mW 275 mW
J 500 mW 11.0 mW/°C 105 °C 500 mW 500 mW 275 mW
JG 500 mW 8.4 mW/°C90°C 500 mW 500 mW 210 mW
P 500 mW 8.0 mW/°C88°C 500 mW 500 mW –
U 500 mW 5.4 mW/°C 57°C 432 mW 351 mW 135 mW
recommended operating conditions
MIN MAX UNIT
Supply voltage, V
CC+
– V
CC–
3.5 30 V
Input voltage (|V
CC±
|≤15 V) V
CC–
+ 0.5 V
CC+
–1.5 V
LM111 –55 125
Operating free-air temperature range, T
A
LM211 –40 85
°C
LM311 0 70
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics at specified free-air temperature, V
CC
±
=
±15 V (unless otherwise noted)
LM111, LM211 LM311
PARAMETER
TEST CONDITIONS
T
A
†
MIN TYP‡MAX MIN TYP‡MAX
UNIT
p
25°C 0.7 3 2 7.5
VIOInput offset voltage
See Note 5
Full range 4 10
mV
p
25°C 4 10 6 50
IIOInput offset current
See Note 5
Full range 20 70
nA
p
25°C 75 100 100 250
IIBInput bias current
V
O
= 1 V to 14
V
Full range 150 300
nA
I
IL(S)
Low-level strobe
current (see Note 6)
V
(strobe)
= 0.3 V, VID ≤ –10 mV 25°C –3 –3 mA
V
ICR
Common-mode
input voltage range
Full range
13
to
–14.5
13.8
to
–14.7
13
to
–14.5
13.8
to
–14.7
V
A
VD
Large-signal
differential voltage
amplification
VO = 5 V to 35 V, RL = 1 kΩ 25°C 40 200 40 200 V/mV
I
(strobe)
= –3 mA, 25°C 0.2 10 nA
I
OH
High-level (collector)
p
VID = 5 mV, VOH = 35 V Full range 0.5 µA
out ut current
VID = 5 mV, VOH = 35 V 25°C 0.2 50 nA
VID = –5 mV 25°C 0.75 1.5
Low-level
I
OL
= 50
mA
VID = –10 mV 25°C 0.75 1.5
V
OL
(collector-to-emitter)
output volta
g
e
V
CC+
= 4.5 V,
VID = –6 mV Full range 0.23 0.4
V
out ut voltage
V
CC–
= 0,
IOL = 8 mA
VID = –10 mV Full range 0.23 0.4
I
CC+
Supply current from
V
CC+
, output low
VID = –10 mV, No load 25°C 5.1 6 5.1 7.5 mA
I
CC–
Supply current from
V
CC–
, output high
VID = 10 mV, No load 25°C –4.1 –5 –4.1 –5 mA
†
Unless otherwise noted, all characteristics are measured with BALANCE and BAL/STRB open and the emitter output grounded.
Full range for LM111 is –55°C to 125°C, for LM211 is –40°C to 85°C, and for LM311 is 0°C to 70°C.
‡
All typical values are at TA = 25°C.
NOTES: 5. 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 V
CC+
. These parameters actually define an error band and take into account the worst-case
effects of voltage gain and input impedance.
6. 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, V
CC
±
=
±15 V, T
A
= 25°C
LM111, LM211, LM31 1
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
Response time, low-to-high-level output
p
115 ns
Response time, high-to-low-level output
R
C
=
500 Ω to 5 V
,
C
L
= 5 pF,
See Note 7
165 ns
NOTE 7: 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.
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics at V
CC
±
=
±15 V (unless otherwise noted)
LM311Y
PARAMETER
TEST CONDITIONS
†
MIN TYP MAX
UNIT
V
IO
Input offset voltage See Note 5 2 7.5 mV
I
IO
Input offset current See Note 5 6 50 nA
I
IB
Input bias current VO = 1 V to 14 V 100 250 nA
I
IL(S)
Low-level strobe current (see Note 6) V
(strobe)
= 0.3 V, VID ≤ –10 mV –3 mA
V
ICR
Common-mode input voltage range
13
to
–14.5
13.8
to
–14.7
V
A
VD
Large-signal differential voltage amplification VO = 5 V to 35 V, RL = 1 kΩ 40 200 V/mV
I
OH
High-level (collector) output current I
strobe
= –3 mA, VID = 5 mV, VOH = 35 V 0.2 50 nA
V
OL
Low-level (collector-to-emitter) output
voltage
IOL = 50 mA, VID = –10 mV 0.75 1.5 V
I
CC+
Supply current from V
CC+
, output low VID = –10 mV, No load 5.1 7.5 mA
I
CC–
Supply current from V
CC–
, output low VID = 10 mV, No load –4.1 –5 mA
†
Unless otherwise noted, all characteristics are measured with BALANCE and BAL/STRB open and the emitter output grounded.
NOTES: 5. 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 V
CC+
. These parameters actually define an error band and take into account the worst-case
effects of voltage gain and input impedance.
6. 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, V
CC
±
=
±15 V, T
A
= 25°C
LM311Y
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
Response time, low-to-high-level output
p
115 ns
Response time, high-to-low-level output
R
C
=
500 Ω to 5 V
,
C
L
= 5 pF,
See Note 7
165 ns
NOTE 7: 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.
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
†
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
I
IO
LM311
Condition 2
Condition 1
LM111
LM211
†
LM111
LM211
†
LM311
V
CC±
= ±15 V
VO = 1 V to 14 V
See Note A
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
I
IB
INPUT BIAS CURRENT
vs
FREE-AIR TEMPERATURE
TA – Free-Air Temperature – °C
LM111
LM211
†
LM311
Condition 1
LM311
LM111
LM211
†
Condition 2
V
CC±
= ±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 V
CC+
.
30
20
10
0
–1 – 0.5 0
– Output Voltage – V
40
50
VOLTAGE TRANSFER CHARACTERISTICS
60
0.5 1
V
O
VID – Differential Input Voltage – mV
V
ID
V
CC+
= 30 V
1 kΩ
Output
V
CC–
VI = 50 V (LM111, LM211)
40 V (LM311)
V
ID
V
CC+
= 30 V
600 Ω
V
CC–
Output
COLLECTOR OUTPUT TRANSFER CHARACTERISTIC
TEST CIRCUIT FOR FIGURE 3
EMITTER OUTPUT TRANSFER CHARACTERISTIC
TEST CIRCUIT FOR FIGURE 3
Collector
Output
RL = 1 kΩ
LM111
LM211
LM311
Emitter Output
RL = 600 Ω
V
CC+
= 30 V
V
CC–
= 0
TA = 25°C
Figure 3
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 4
4
3
1
0
0 50 100 150 200 250
5
t – Time – ns
300 350
2
Differential
Input Voltage
– Output Voltage – VV
O
OUTPUT RESPONSE FOR
VARIOUS INPUT OVERDRIVES
100 mV
20 mV
2 mV
5 mV
V
CC±
= ±15 V
RC = 500 Ω to 5 V
TA = 25°C
Figure 5
4
3
1
0
0 50 100 150 200 250
5
t – Time – ns
OUTPUT RESPONSE FOR
VARIOUS INPUT OVERDRIVES
300 350
2
Differential
Input Voltage
– Output Voltage – VV
O
20 mV
5 mV
2 mV
100 mV
V
CC±
= ±15 V
RC = 500 Ω to 5 V
TA = 25°C
V
ID
V
CC+
= 15 V
500 Ω
V
O
V
CC–
= –15 V
TEST CIRCUIT FOR FIGURES 4 AND 5
5 V
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 6
5
0
– 10
– 15
0 0.2 0.4 0.6 0.8 1.0
10
t – Time – ns
1.2 1.4
– 5
Differential
Input Voltage
– Output Voltage – VV
O
OUTPUT RESPONSE FOR
VARIOUS INPUT OVERDRIVES
15
1.6 1.8
20 mV
V
CC±
= ±15 V
RE = 2 kΩ to –15 V
TA = 25°C
100 mV
2 mV
5 mV
Figure 7
t – Time – ns
OUTPUT RESPONSE FOR
VARIOUS INPUT OVERDRIVES
Differential
Input Voltage
– Output Voltage – VV
O
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
V
CC±
= ±15 V
RE = 2 kΩ to –15 V
TA = 25°C
2 mV
5 mV
100 mV
V
ID
V
CC+
= 15 V
2 kΩ
V
O
V
CC –
= –15 V
TEST CIRCUIT FOR FIGURES 6 AND 7
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 8
60
40
20
0
0510
– Output Current – mA
80
100
120
15
I
O
V
CC±
= ±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
P
O
700
800
OUTPUT CURRENT AND DISSIPATION
vs
OUTPUT VOLTAGE
PO (right scale)
IO (left scale)
Figure 9
3
2
1
0
0510
4
5
6
15
TA = 25°C
No Load
V
CC+
– Positive Supply Voltage – V
VID = –10 mV
POSITIVE SUPPLY CURRENT
vs
POSITIVE SUPPLY VOLTAGE
I
CC+
– Positive Supply Current – mA
VID = 10 mV
– 3
– 2
– 1
0
0– 5– 10
– 4
– 5
– 6
– 15
NEGATIVE SUPPLY CURRENT
vs
NEGATIVE SUPPLY VOLTAGE
V
CC–
– Negative Supply Voltage – V
VID = 10 mV or –10 mV
I
CC–
– Negative Supply Current – mA
TA = 25°C
No Load
Figure 10
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
Figure 11 through Figure 29 show various applications for the LM111, LM211, and LM311 comparators.
Figure 11. 100-kHz Free-Running Multivibrator
V
CC+
39 kΩ
1200 pF
20 kΩ 1 kΩ
10 kΩ
20 kΩ
Square Wave
Output
(fanout to two
Series 54 gates
or equivalent)
Figure 12. Offset Balancing
3 kΩ
3 kΩ
V
CC+
BALANCE
BAL/
STRB
Figure 13. Strobing
1 kΩ
BAL/STRB
TTL Strobe
2N2222
Figure 14. Zero-Crossing Detector
V
CC+
Input
V
CC–
20 kΩ
Output
†
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
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
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 µF
50 kΩ
V
CC+
2 kΩ100 kΩ
100 kΩ
100 kHz
Output
10 pF
Figure 18. Comparator and Solenoid Driver
Input
TIP30
22 kΩ
Output
V
CC+
Figure 19. Strobing Both Input and
Output Stages Simultaneously
†
Typical input current is 50 pA with inputs strobed off.
V
CC+
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 Ω
3.9 kΩ
10 kΩ
1.5 µF
+
V
CC+
Output
2N2222
2N3708
1 kΩ
Figure 21. Zero-Crossing
Detector Driving MOS Logic
3 kΩ
3 kΩ
V
CC+
= 5 V
Input
10 kΩ
V
CC–
= –10 V
Output
to MOS
BAL/
STRB
BALANCE
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
†
Adjust to set clamp level
3.9 kΩ
30 kΩ
†
1.5 µF
+
V
CC+
= 5 V
Input
From TTL
2N2222
2N3708
Output
510 Ω
1 kΩ 1 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
TIL102
5 V
V
CC+
= 5 V
Figure 23. Digital Transmission Isolator
1.5 µF
+
10 kΩ
2 kΩ
V
CC+
= 15 V
TL081
Output
Input
1 MΩ
V
CC–
= –15 V
–
+
Figure 24. Positive-Peak Detector
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
15 µF
+
10 kΩ
1 MΩ
V
CC+
= 15 V
TL081
Output
Input
V
CC–
= –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
V
CC+
= 5 V
1N2175
Figure 26. Precision Photodiode Comparator
‡
Transient voltage and inductive kickback protection
2N3708
V
CC+
Inputs
TTL Strobe
V
CC–
‡
1 kΩ
BAL/STRB
Figure 27. Relay Driver With Strobe
LM111, LM211, LM311, LM311Y
DIFFERENTIAL COMPARATORS WITH STROBES
SLCS007A – SEPTEMBER 1973 – REVISED FEBRUARY 1992
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
300 Ω
V
CC+
V
CC–
100 kΩ
Output
100 kΩ
47 Ω
10 kΩ
620 Ω
TIP30
TIP29
Input
0.1 µF 300 Ω
620 Ω
1
2
BAL/STRB
BAL/STRB
Figure 28. Switching Power Amplifier
0.22 µF
300 kΩ
620 Ω
1
V
CC–
2
V
CC–
V+
620 Ω
620 Ω
620 Ω
620 Ω
620 Ω
TIP29
TIP30
39 kΩ
510 Ω
510 Ω
15 kΩ
15 kΩ
39 kΩ
300 kΩ
Outputs
V
CC+
Input
Reference
TIP29
TIP30
BAL/STRB
BAL/STRB
Figure 29. Switching Power Amplifiers
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