Lm301
Páginas: 16 (3803 palabras)
Publicado: 18 de octubre de 2012
Voltage Comparator
1.0 General Description
The LM111, LM211 and LM311 are voltage comparators that
have input currents nearly a thousand times lower than
devices like the LM106 or LM710. They are also designed to
operate over a wider range of supply voltages: from standard
± 15V op amp supplies down to the single 5V supply used for
IC logic. Their output is compatiblewith RTL, DTL and TTL
as well as MOS circuits. Further, they can drive lamps or
relays, switching voltages up to 50V at currents as high as
50 mA.
Both the inputs and the outputs of the LM111, LM211 or the
LM311 can be isolated from system ground, and the output
can drive loads referred to ground, the positive supply or the
negative supply. Offset balancing and strobe capability are
providedand outputs can be wire OR’ed. Although slower
than the LM106 and LM710 (200 ns response time vs 40 ns)
3.0 Typical Applications
the devices are also much less prone to spurious oscillations. The LM111 has the same pin configuration as the
LM106 and LM710.
The LM211 is identical to the LM111, except that its performance is specified over a −25˚C to +85˚C temperature range
instead of−55˚C to +125˚C. The LM311 has a temperature
range of 0˚C to +70˚C.
2.0 Features
n
n
n
n
n
Operates from single 5V supply
Input current: 150 nA max. over temperature
Offset current: 20 nA max. over temperature
Differential input voltage range: ± 30V
Power consumption: 135 mW at ± 15V
(Note 3)
Offset Balancing
Strobing
00570436
00570437
Note: Do Not Ground Strobe Pin.Output is turned off when current is
pulled from Strobe Pin.
Increasing Input Stage Current (Note 1)
Detector for Magnetic Transducer
00570438
Note 1: Increases typical common mode slew from 7.0V/µs to 18V/µs.
00570439
© 2004 National Semiconductor Corporation
DS005704
www.national.com
LM111/LM211/LM311 Voltage Comparator
January 2001
LM111/LM211/LM311
3.0Typical Applications
(Note 3)
(Continued)
Digital Transmission Isolator
Relay Driver with Strobe
00570440
00570441
*Absorbs inductive kickback of relay and protects IC from severe voltage
transients on V++ line.
Note: Do Not Ground Strobe Pin.
Strobing off Both Input and Output Stages (Note 2)
00570442
Note: Do Not Ground Strobe Pin.
Note 2: Typical input current is 50pA with inputs strobed off.
Note 3: Pin connections shown on schematic diagram and typical applications are for H08 metal can package.
Positive Peak Detector
Zero Crossing Detector Driving MOS Logic
00570424
00570423
*Solid tantalum
www.national.com
2
LM111
−55˚C to 125˚C
LM211
−25˚C to 85˚C
Lead Temperature (Soldering, 10 sec)
260˚C
Voltage at Strobe PinIf Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V+−5V
Soldering Information
Total Supply Voltage (V84)
36V
Dual-In-Line Package
Output to Negative Supply Voltage
(V74)
50V
Small Outline Package
Ground to Negative Supply Voltage
(V14)
30V
Soldering(10 seconds)
260˚C
Vapor Phase (60 seconds)
± 30V
± 15V
Differential Input Voltage
Input Voltage (Note 4)
Output Short Circuit Duration
215˚C
Infrared (15 seconds)
220˚C
See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.
10 sec
Operating Temperature Range
ESD Rating (Note 11)Electrical Characteristics
(Note 6)
Parameter
300V
for the LM111 and LM211
Conditions
Min
Typ
Max
Units
Input Offset Voltage (Note 7)
TA=25˚C, RS≤50k
0.7
3.0
mV
Input Offset Current
TA=25˚C
4.0
10
nA
Input Bias Current
TA=25˚C
60
100
nA
Voltage Gain
TA=25˚C
Response Time (Note 8)
TA=25˚C
200
Saturation...
Leer documento completo
Regístrate para leer el documento completo.