Datasheet LM311 Datasheet (Fairchild Semiconductor)

LM311

Single Comparator

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Features

• Low input bias current : 250nA (Max)

• Low input offset current : 50nA (Max)

• Differential Input Voltage : ±30V

• Power supply voltage : single 5.0V supply to ±15V.

• Offset voltage null capability.

• Strobe capability.

Internal Block Diagram

Description

The LM311 series is a monolithic, low input current voltage
comparator. The device is also designed to operate from dual
or single supply voltage.

8-DIP

1

8-SOP

1

©2001 Fairchild Semiconductor Corporation

Rev. 1.0.1

LM311

Schematic Diagram

Absolute Maximum Ratings

Parameter Symbol Value Unit

Total Supply Voltage V
Output to Negative Supply Voltage LM311 V
Ground to Negative voltage V
Differential Input Voltage V
Input Voltage V

CC

- V

O

EE

I(DIFF)

I

EE

Output Short Circuit Duration - 10 sec
Power Dissipation P
Operating Temperature Range T
Storage Temperature Range T

D

OPR

STG

36 V
40 V

-30 V
30 V

±15 V

500 mW

0 ~ +70 °C

- 65 ~ +150 °C

2

Electrical Characteristics

(V

= 15V, TA = 25°C, unless otherwise specified)

CC

Parameter Symbol Conditions Min. Typ. Max. Unit

Input Offset Voltage V

Input Offset Current I

Input Bias Current I
Voltage Gain G

Response Time T

Saturation Voltage V

Strobe “ON” Current I
Output Leakage Current I

Input Voltage Range V

Positive Supply Current I
Negative Supply Current I
Strobe Current I

IO

IO

BIAS

V

RES

SAT

STR(ON)

SINK

I(R)

CC
EE

STR

≤ 50KΩ -1.07.5

R

S

Note 1 - - 10

-650

Note 1 - - 70

- 100 250

Note 1 - - 300

- 40 200 - V/mV
Note 2 - 200 - ns

IO =50mA, V

≥ 4.5V, V

V

CC

I

=8mA, V

O

≤ -10mV - 0.75 1.5

I

=0V

EE

≤ -10mV,

I

Note 1

- 0.23 0.4

--3-mA

I

=3mA, V

STR

V

=15V, VCC=±15V

O

Note 1

≥ 10mV

I

- 0.2 50 nA

to

13.0

-14.7
to

13.8

-14.5

--3.07.5mA

- - -2.2 -5.0 mA

--3-mA

LM311

mV

nA

nA

V

-V

Notes :

1. 0 ≤ T

2. The response time specified is for a 100mV input step with 5mV over drive.

≤ +70°C

A

3

LM311

Typical Performance Characteristics

Figure 1. Input Bias Current vs Temperature Figure 2. Input Offset Current vs Temperature

Figure 3. Offset Voltage vs Input Resistance Figure 4. Input Bias Current vs

Figure 5. Common Mode Limits vs Temperature Figure 6. Output Voltage vs

Differential input voltage

Differential input voltage

4

Typical Performance Characteristics (continued)

Figure 7. Saturation voltage vs Current Figure 8. Supply Current vs Temperature

LM311

Figure 9. Leakage Current vs Temperature Figure 10. Supply Current vs Supply Voltage

Figure 11. Current Saturation Voltage Figure 12. Output Limiting Characterstics

5

LM311

Mechanical Dimensions

Package

6.40 ±0.20

±0.008

0.252

8-DIP

0.79

0.031

()

±0.10

#1

#8

#4 #5

7.62

0.300

MAX

0.378

5.08

0.200

9.20 ±0.20

MAX

9.60

3.40 ±0.20

0.134 ±0.008

0.362 ±0.008

0.33

0.013

3.30 ±0.30

0.130 ±0.012

MIN

0.46

2.54

0.018 ±0.004

0.100

1.524 ±0.10

0.060 ±0.004

+0.10

0.25

–0.05

+0.004

0.010

–0.002

0~15°

6

LM311

Mechanical Dimensions

Package

#1

#4

6.00 ±0.30

0.006

0.15

0.236 ±0.012

(Continued)

8-SOP

1.55 ±0.20

0.061 ±0.008

#8

#5

MAX

5.13

0.202

1.80

0.071

4.92 ±0.20

MAX

0.194 ±0.008

MIN

0.004~0.001

1.27

0.1~0.25

0.56

0.022

()

0.41 ±0.10

0.050

0.016 ±0.004

+

-0.002

-0.05

0.004

0.50 ±0.20

0.020 ±0.008

+

0.10

3.95 ±0.20

0.156 ±0.008

5.72

0.225

0~8°

MAX0.10

MAX0.004

7

LM311

Ordering Information

Product Number Package Operating Temperature

LM311N 8-DIP

LM311M 8-SOP

0 ~ +70°C

8

LM311

9

LM311

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURT HER NOTICE TO ANY
PRODUCTS HEREI N TO IMPROVE RELIABILITY, FUNCTIO N OR DESIGN. FAIRCH IL D DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER IT S PATENT RIGHTS, NOR THE RIGHTS OF OTHE RS.

LIFE SUPPORT POL I CY

FAIRCHILD’S PR ODUCTS ARE NOT AUTH ORIZED FOR USE AS C RITICAL COMPONENT S IN LIFE SUPPORT DE VICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein :

1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with

2. A critical component in any component of a life support
device or sy stem whose fai lure to perform can be
reasonably expec ted to cause the failur e of the life support
device or system, or to affect its safety or effec t iv ene ss .

instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.

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6/1/01 0.0m 001

 2001 Fairchild Semiconductor Corporation

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