LM306
DIFFERENTIAL COMPARATOR WITH STROBES
SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Fast Response Times
D
Improved Gain and Accuracy
D
Fanout to 10 Series 54/74 TTL Loads
D
Strobe Capability
D
Short-Circuit and Surge Protection
D
Designed to Be Interchangeable With
National Semiconductor LM306
description
The LM306 is a high-speed voltage comparator
with differential inputs, a low-impedance highsink-current (100 mA) output, and two strobe
inputs. This device detects low-level analog or
digital signals and can drive digital logic or lamps
and relays directly. Short-circuit protection and
surge-current limiting is provided.
A low-level input at either strobe causes the output
to remain high regardless of the differential
input.When both strobe inputs are either open or
at a high logic level, the output voltage is
controlled by the differential input voltage. The
circuit will operate with any negative supply
voltage between –3 V and –12 V with little
difference in performance.
The LM306 is characterized for operation from
0°C to 70°C.
AVAILABLE OPTIONS
PACKAGE
T
A
VIOmax
°
SMALL OUTLINE PLASTIC DIP
at 25 C
(D) (P)
0°C to 70°C 5 mV LM306D LM306P
Copyright 1991, 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
8
7
6
5
GND
IN+
IN–
V
CC–
V
CC+
OUT
STROBE 2
STROBE 1
D OR P PACKAGE
(TOP
VIEW)
IN–
IN+
STROBE 2
STROBE 1
OUT
functional block diagram
LM306
DIFFERENTIAL COMPARATOR WITH STROBES
SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
schematic
V
CC–
IN–
IN+
70 Ω
STROBE 2
STROBE 1
V
CC+
OUT
GND
6.3 V
6.3 V
6.3 V
6.3 V
5 kΩ
6.3 V
17 kΩ
300 Ω
5 kΩ
300 Ω
600 Ω
3.5 kΩ
600 Ω
3 Ω
Resistor values are nominal.
LM306
DIFFERENTIAL COMPARATOR WITH STROBES
SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991
3
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) 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply voltage, V
CC–
(see Note 1) –15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential input voltage, V
ID
(see Note 2) ±5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
(either input, see Notes 1 and 3) ±7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strobe voltage range (see Note 1) 0 V to V
CC+
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage, V
O
(see Note 1) 24 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage from output to V
CC–
30 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Duration of output short circuit to ground (see Note 4) 10 s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 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, except differential voltages and the voltage from the output to V
CC–
, are with respect to the network ground.
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 7 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
D
P
600 mW
600 mW
5.8 mW/°C
8.0 mW/°C
46°C
75°C
464 mW
600 mW
LM306
DIFFERENTIAL COMPARATOR WITH STROBES
SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics at specified free-air temperature, V
CC+
= 12 V , V
CC–
= –3 V to –12 V (unless
otherwise noted)
PARAMETER TEST CONDITIONS
†
T
A
‡
MIN TYP MAX UNIT
p
25°C 1.6
§
5
VIOInput offset voltage
R
S
≤
200 Ω
Full range 6.5
mV
α
VIO
Average temperature coefficient of
input offset voltage
RS = 50 Ω, See Note 5 Full range 5 20 µV/°C
25°C 1.8 5
I
IO
Input offset current See Note 5
MIN 1 7.5
µA
MAX 0.5 5
Average temperature coefficient of
MIN to 25°C 24 100
°
α
IIO
g
input offset current
See Note 5
25°C to MAX 15 50
nA/°C
p
MIN to 25°C 40
IIBInput bias current
V
O
= 0.5 V to 5
V
25°C to MAX 16 25
µ
A
I
IL(S)
Low-level strobe current V
(strobe)
= 0.4 V Full range –1.7 –3.2 mA
V
IH(S)
High-level strobe voltage Full range 2.2 V
V
IL(S)
Low-level strobe voltage Full range 0.9 V
V
ICR
Common-mode input voltage range V
CC–
= –7 V to –12 V Full range ±5 V
V
ID
Differential input voltage range Full range ±5 V
A
VD
Large-signal differential voltage
amplification
VO = 0.5 V to 5 V, No load 25°C 40 V/mV
V
OH
High-level output voltage IOH = –400 µA VID = 8 mV Full range 2.5 5.5 V
IOL = 100 mA VID = –7 mV
25°C 0.8 2
V
OL
Low-level output voltage
IOL = 50 mA
VID = –7 mV
Full range 1
V
IOL = 16 mA VID = –8 mV
Full range 0.4
p
VD = 7 mV
MIN to 25°C 0.02 2
IOHHigh-level output voltage
V
OH
= 8 V to 24
V
VID = 8 mV
25°C to MAX 100
µ
A
I
CC+
Supply current from V
CC+
VID = –5 mV , No load Full range 6.6 10 mA
I
CC–
Supply current from V
CC–
No load Full range –1.9 –3.6 mA
†
Unless otherwise noted, all characteristics are measured with both strobes open.
‡
Full range is 0°C to 70°C. MIN is 0°C. MAX is 70°C.
§
This typical value is at V
CC+
= 12 V, V
CC–
= –6 V.
NOTE 5: The offset voltages and offset currents given are the maximum values required to drive the output down to the low range (VOL) or up
to the high range (VOH). These parameters actually define an error band and take into account the worst-case effects of voltage gain
and input impedance.
switching characteristics, V
CC+
= 12 V, V
CC–
= –6 V, TA = 25°C
PARAMETER TEST CONDITIONS
†
MIN TYP MAX UNIT
Response time, low-to-high-level output RL = 390 Ω to 5 V, CL = 15 pF, See Note 6 28 40 ns
†
All characteristics are measured with both strobes open.
NOTE 6: 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.
LM306
DIFFERENTIAL COMPARATOR WITH STROBES
SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
I
IB
Input bias current vs Free-air temperature 1
I
IO
Input offset current vs Free-air temperature 2
V
OH
High-level output voltage vs Free-air temperature 3
V
OL
Low-level output voltage vs Free-air temperature 4
V
O
Output voltage vs Differential input voltage 5
I
O
Output current vs Differential input voltage 6
A
VD
Large-signal differential voltage amplification vs Free-air temperature 7
I
OS
Short-circuit output current vs Free-air temperature 8
Output response vs Time 9, 10
I
CC+
Positive supply current vs Positive supply voltage 11
I
CC–
Negative supply current vs Negative supply voltage 12
P
D
Total power dissipation vs Free-air temperature 13
Figure 1
1.5
1
0.5
0
01020304050
2
2.5
INPUT OFFSET CURRENT
vs
FREE-AIR TEMPERATURE
3
60 70
V
CC+
= 12 V
V
CC–
= – 6 V
VO = 0.5 V to 5 V
TA – Free Air Temperature – ° C
I
IO
– Input Offset Current –
Aµ
Figure 2
10
8
2
0
0 102030405060
– Input Bias Current –
14
18
INPUT BIAS CURRENT
vs
FREE-AIR TEMPERATURE
20
70
6
16
12
4
V
CC+
= 12 V
V
CC–
= – 6 V
VO = 0.5 V to 5 V
TA – Free-Air Temperature – °C
I
IB
Aµ
LM306
DIFFERENTIAL COMPARATOR WITH STROBES
SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 3
4
3
2
1
01020304050
– High-Level Output Voltage – V
5
6
HIGH-LEVEL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
7
60 70
TA – Free-Air Temperature – °C
V
OH
V
CC+
= 12 V
V
CC–
= – 3 V to – 12 V
VID = 8 mV
IOH = 0
IOH = – 400 µA
Figure 4
0.6
0.4
0.2
0
01020304050
– Low-Level Output Voltage – V
0.8
1
LOW-LEVEL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
1.2
60 70
V
OL
TA – Free-Air Temperature – °C
V
CC+
= 12 V
V
CC–
= – 3 V to – 12 V
VID = –8 mV
IOL = 100 mA
IOL = 50 mA
IOL = 16 mA
IOL = 0
Figure 5
3
1
0
– 1
– 2 – 1 0
– Output Voltage – V
5
6
7
12
4
2
T
A
= 0°C
TA = 25°C
V
CC+
= 12 V
V
CC–
= – 6 V
RL = ∞
V
O
VID – Differential Input Voltage – mV
OUTPUT VOLTAGE
vs
DIFFERENTIAL INPUT VOLTAGE
TA = 70°C
Figure 6
– 5– 4– 3– 2– 1 0 1
– Output Current – A
1
OUTPUT CURRENT
vs
DIFFERENTIAL INPUT VOLTAGE
10
23
T
A
= 0°C
TA = 25°C
TA = 70°C
TA = 0°C
10
–1
10
–2
10
–3
10
–4
10
–5
10
–6
10
–7
10
–8
10
–9
VID – Differential Input Voltage – mV
I
O
V
CC+
= VO = 12 V
V
CC–
= – 3 V to – 12 V
TA = 70°C
TA = 25°C
LM306
DIFFERENTIAL COMPARATOR WITH STROBES
SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 7
40,000
20,000
0
01020304050
60,000
LARGE-SIGNAL DIFFERENTIAL
VOLTAGE AMPLIFICATION
vs
FREE-AIR TEMPERATURE
80,000
60
TA – Free-Air Temperature – °C
V
CC+
= 10 V
V
CC+
= 15 V
V
CC+
= 15 V
V
CC–
= – 3 V to – 12 V
AVD – Large-Signal Differential
A
VD
Voltage Amplification
VO = 1 to 2 V
RL = ∞
70
Figure 8
0.2
0.1
0
– Short-Circuit Output Current – A
0.3
SHORT-CIRCUIT OUTPUT CURRENT
vs
FREE-AIR TEMPERATURE
0.4
I
OS
V
CC+
= VO = 12 V
TA – Free-Air Temperature – °C
010203040506070
V
CC–
= – 6 V
VID = – 8 mV
See Note A
NOTE A: This parameter was measured using a single 5-ms
pulse.
Figure 9
4
2
1
0
02040
– Output Voltage – V
5
3
t – Time – ns
OUTPUT RESPONSE FOR
VARIOUS INPUT OVERDRIVES
60 80 100
100 mV
20 mV
5 mV
2 mV
10 mV
V
O
Differential
Input Voltage
V
CC+
= 12 V
V
CC–
= – 6 V
CL = 15 pF
RL = 390 Ω to 5 V
TA = 25°C
Figure 10
4
3
3
0
0204060
5
80 100
20 mV
V
CC+
= 12 V
V
CC–
= – 6 V
CL = 15 pF
RL = 390 Ω to 5 V
TA = 25°C
– Output Voltage – V
V
O
Differential
Input Voltage
2
t – Time – ns
OUTPUT RESPONSE FOR
VARIOUS INPUT OVERDRIVES
100 mV
10 mV
5 mV
2 mV
LM306
DIFFERENTIAL COMPARATOR WITH STROBES
SLCS008A – OCTOBER 1979 – REVISED OCTOBER 1991
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 11
5
4
1
0
9 101112131415
7
9
POSITIVE SUPPLY CURRENT
vs
POSITIVE SUPPLY VOLTAGE
10
16 17
3
8
6
2
VID = – 5 mV
VID = 5 mV
V
CC+
– Positive Supply Voltage – V
RL = ∞
TA = 25°C
V
CC–
= – 3 V to – 12 V
– Positive Supply Current – mA
CC+
I
Figure 12
2
1
0
0– 2– 4– 6– 8– 10
3
NEGATIVE SUPPLY CURRENT
vs
NEGATIVE SUPPLY VOLTAGE
4
– 12 – 14 – 16
V
CC–
– Negative Supply Voltage – V
V
CC+
= 12 V
RL = ∞
TA = 25°C
– Negative Supply Current – mA
CC –
I
60
40
20
0
01020 4050
– Total Power Dissipation – mW
80
100
TOTAL POWER DISSIPATION
vs
FREE-AIR TEMPERATURE
120
60 70
TA – Free-Air Temperature – °C
P
D
VID = – 8 mV
VID = 8 mV
30
V
CC+
= 12 V
V
CC–
= – 6 V
RL = ∞
Figure 13
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