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Motorola
Motorola

LM311 Datasheet

HIGH PERFORMANCE VOLTAGE COMPARATORS


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Highly Flexible Voltage
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. Thus the LM211/LM311 can be used to
drive relays, lamps or solenoids.
Order this document by LM311/D
LM311
LM211
HIGH PERFORMANCE
VOLTAGE COMPARATORS
SEMICONDUCTOR
TECHNICAL DATA
Typical Comparator Design Configurations
Split Power Supply with Offset Balance
3.0 k VCC
Single Supply
VCC
Inputs
5.0 k
5
2
+
6
3
4
VEE
87
1
RL
Output
Inputs
28
+
7
3
1
VEE 4
RL
Output
Ground–Referred Load
VCC
2
Inputs 3
+8 7
1
4 RL
Output
VEE
Input polarity is reversed when
Gnd pin is used as an output.
Load Referred to Negative Supply
VCC
Inputs
2
+
8
7
31
4 RL
Output
VEE
Input polarity is reversed when
Gnd pin is used as an output.
Load Referred to Positive Supply
Inputs
2
+
3
4
VEE
VCC
8
7
1
RL
Output
Strobe Capability
VCC
Inputs
2+ 8
3
6
4
VEE
7
1
RL
Output
TTL Strobe
1.0 k
8
1
N SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
PIN CONNECTIONS
Gnd 1
Inputs
2
3
VEE 4
+
8 VCC
7 Output
6 Balance/Strobe
5 Balance
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
LM211D
LM311D
LM311N
TA = 25° to +85°C
TA = 0° to +70°C
SO–8
SO–8
Plastic DIP
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 5
1
Page 1

LM311 LM211
MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.)
Rating
Symbol
Total Supply Voltage
Output to Negative Supply Voltage
Ground to Negative Supply Voltage
Input Differential Voltage
Input Voltage (Note 2)
Voltage at Strobe Pin
VCC +VEE
VO –VEE
VEE
VID
Vin
Power Dissipation and Thermal Characteristics
Plastic DIP
Derate Above TA = +25°C
Operating Ambient Temperature Range
Operating Junction Temperature
Storage Temperature Range
PD
1/θJA
TA
TJ(max)
Tstg
LM211
36
50
30
±30
±15
VCC to VCC–5
LM311
36
40
30
±30
±15
VCC to VCC–5
625
5.0
–25 to +85
0 to +70
+150
+150
–65 to +150
–65 to +150
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mW
mW/°C
°C
°C
°C
ELECTRICAL CHARACTERISTICS (VCC = +15 V, VEE = –15 V, TA = 25°C, unless otherwise noted [Note 1].)
LM211
LM311
Characteristic
Symbol Min Typ Max Min Typ Max Unit
Input Offset Voltage (Note 3)
RS 50 k, TA = +25°C
RS 50 k, Tlow TA Thigh*
Input Offset Current (Note 3) TA = +25°C
Tlow TA Thigh*
Input Bias Current TA = +25°C
Tlow TA Thigh*
Voltage Gain
Response Time (Note 4)
VIO mV
– 0.7 3.0 – 2.0 7.5
– – 4.0 – – 10
IIO – 1.7 10 – 1.7 50 nA
– – 20 – – 70
IIB
45 100
45 250 nA
– – 150 – – 300
AV
40 200
40 200
– V/mV
– 200 –
– 200 – ns
Saturation Voltage
VID –5.0 mV, IO = 50 mA, TA = 25°C
VID –10 mV, IO = 50 mA, TA = 25°C
VCC 4.5 V, VEE = 0, Tlow TA Thigh*
VID 6 6.0 mV, Isink 8.0 mA
VID 6 10 mV, Isink 8.0 mA
Strobe ”On” Current (Note 5)
Output Leakage Current
VID 5.0 mV, VO= 35 V, TA = 25°C, Istrobe= 3.0 mA
VID 10 mV, VO= 35 V, TA = 25°C, Istrobe= 3.0 mA
VID 5.0 mV, VO= 35 V, Tlow TA Thigh*
Input Voltage Range (Tlow TA Thigh*)
VOL
IS
VICR
– 0.75 1.5
–––
– 0.23 0.4
–––
– 3.0 –
V
–––
– 0.75 1.5
–––
– 0.23 0.4
– 3.0 – mA
–14.5
0.2
0.1
–14.7 to
13.8
10
0.5
+13.0
–14.5
0.2
–14.7 to
13.8
50
+13.0
nA
nA
µA
V
Positive Supply Current
ICC
+2.4
+6.0
+2.4 +7.5 mA
Negative Supply Current
IEE – –1.3 –5.0 – –1.3 –5.0 mA
* Tlow = –25°C for LM211
= 0°C for LM311
Thigh = +85°C for LM211
= +70°C for LM311
NOTES: 1. Offset voltage, offset current and bias current specifications apply for a supply voltage range from a single 5.0 V supply up to ±15 V supplies.
2. This rating applies for ±15 V supplies. The positive input voltage limit is 30 V above the negative supply. The negative input voltage limit is equal to the
negative supply voltage or 30 V below the positive supply, whichever is less.
3. The offset voltages and offset currents given are the maximum values required to drive the output within a volt of either supply with a 1.0 mA load. Thus,
these parameters define an error band and take into account the ”worst case” effects of voltage gain and input impedance.
4. The response time specified is for a 100 mV input step with 5.0 mV overdrive.
5. Do not short the strobe pin to ground; it should be current driven at 3.0 mA to 5.0 mA.
2 MOTOROLA ANALOG IC DEVICE DATA
Page 2

LM311 LM211
Figure 1. Circuit Schematic
5
Balance
Balance/Strobe
6
1.3 k
300
300
1.3 k 800
100
3.7 k 3.7 k
800
2
Inputs
3
730 340
3.0 k
300
250 900
800
1.3 k
1.3 k 5.4 k
8
VCC
5.0 k
7
200 Output
600
1
Gnd
4
VEE
Figure 2. Input Bias Current
versus Temperature
140
VCC = +15 V
VEE = –15 V
120
100 Pins 5 & 6 Tied
to VCC
80 Normal
40
0
–55 –25
0 25 50 75
TA, TEMPERATURE (°C)
100 125
Figure 4. Input Bias Current versus
Differential Input Voltage
140
VCC = +15 V
120 VEE = –15 V
TA = +25°C
100
80
60
40
20
0
–16 –12 –8.0 –4.0 0 4.0 8.0 12 16
DIFFERENTIAL INPUT VOLTAGE (V)
Figure 3. Input Offset Current
versus Temperature
5.0
VCC = +15 V
VEE = –15 V
4.0
Pins 5 & 6 Tied
to VCC
3.0
2.0
1.0
0
–55 –25
Normal
0 25 50 75
TA, TEMPERATURE (°C)
100 125
Figure 5. Common Mode Limits
versus Temperature
VCC Referred to Supply Voltages
–0.5
–1.0
–1.5
0.4
0.2
VEE
–55
–25
0 25 50 75
TA, TEMPERATURE (°C)
100 125
MOTOROLA ANALOG IC DEVICE DATA
3
Page 3

LM311 LM211
Figure 6. Response Time for
Various Input Overdrives
5.0 5.0 mV
4.0
3.0 20 mV
2.0
1.0 2.0 mV
0
100
50
0
Vin *)
+5.0 V
500
VO
VCC = +15 V
VEE = –15 V
TA = +25°C
0 0.1 0.2 0.3 0.4 0.5 0.6
tTLH, RESPONSE TIME (µs)
Figure 7. Response Time for
Various Input Overdrives
5.0
4.0
3.0
2.0 20 mV
1.0
0
5.0 mV
Vin
2.0 mV
*)
+5.0 V
500
VO
0
–50
VCC = +15 V
VEE = –15 V
TA = +25°C
–100
0 0.1 0.2 0.3 0.4 0.5 0.6
tTHL, RESPONSE TIME (µs)
Figure 8. Response Time for
Various Input Overdrives
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
1.0
tTLH, RESPONSE TIME (µs)
VCC = +15 V
VEE = –15 V
TA = +25°C
2.0
Figure 9. Response Time for
Various Input Overdrives
15
10
5.0
0
–5.0
–10
–15 20 mV
100
50
0
0
5.0 mV
2.0 mV
VCC
*Vin
)
VEE
VO
2.0 k
VCC = +15 V
VEE = –15 V
TA = +25°C
1.0 2.0
tTHL, RESPONSE TIME (µs)
Figure 10. Output Short Circuit Current
Characteristics and Power Dissipation
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)
0.90
0.75
0.60
0.45
0.30
0.15
0
0
Figure 11. Output Saturation Voltage
versus Output Current
TA = –55°C
TA = +25°C
TA = +125°C
8.0 16 24 32 40 48
IO, OUTPUT CURRENT (mA)
56
4 MOTOROLA ANALOG IC DEVICE DATA
Page 4
Part Number LM311
Manufactur Motorola
Description HIGH PERFORMANCE VOLTAGE COMPARATORS
Total Page 8 Pages
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