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PDF LM111 Data sheet ( Hoja de datos )

Número de pieza LM111
Descripción Voltage Comparator
Fabricantes National Semiconductor 
Logotipo National Semiconductor Logotipo



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No Preview Available ! LM111 Hoja de datos, Descripción, Manual

May 1999
LM111/LM211/LM311
Voltage Comparator
1.0 General Description
The LM111, LM211 and LM311 are voltage comparators that
have input currents nearly a thousand times lower than de-
vices 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 compatible with RTL, DTL and TTL
as well as MOS circuits. Further, they can drive lamps or re-
lays, 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
provided and outputs can be wire OR’ed. Although slower
than the LM106 and LM710 (200 ns response time vs 40 ns)
the devices are also much less prone to spurious oscilla-
tions. The LM111 has the same pin configuration as the
LM106 and LM710.
The LM211 is identical to the LM111, except that its perfor-
mance 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 Operates from single 5V supply
n Input current: 150 nA max. over temperature
n Offset current: 20 nA max. over temperature
n Differential input voltage range: ±30V
n Power consumption: 135 mW at ±15V
3.0 Typical Applications (Note 3)
Offset Balancing
Strobing
DS005704-36
Increasing Input Stage Current (Note 1)
DS005704-37
Note: Do Not Ground Strobe Pin. Output is turned off when current is
pulled from Strobe Pin.
Detector for Magnetic Transducer
DS005704-38
Note 1: Increases typical common mode slew from 7.0V/µs to 18V/µs.
DS005704-39
© 1999 National Semiconductor Corporation DS005704
www.national.com

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LM111 pdf
6.0 LM111/LM211 Typical Performance Characteristics
Input Bias Current
Input Offset Current
Offset Error
DS005704-43
DS005704-44
Input Characteristics
Common Mode Limits
Transfer Function
DS005704-45
DS005704-46
Response Time for Various
Input Overdrives
DS005704-47
Response Time for Various
Input Overdrives
DS005704-48
Output Saturation Voltage
DS005704-49
DS005704-50
DS005704-51
5 www.national.com

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LM111 arduino
9.0 Typical Applications (Pin numbers refer to H08 package) (Continued)
10 Hz to 10 kHz Voltage Controlled Oscillator
*Adjust for symmetrical square wave time when VIN = 5 mV
Minimum capacitance 20 pF Maximum frequency 50 kHz
Driving Ground-Referred Load
DS005704-15
Using Clamp Diodes to Improve Response
DS005704-16
*Input polarity is reversed when using pin 1 as output.
TTL Interface with High Level Logic
DS005704-17
*Values shown are for a 0 to 30V logic swing and a 15V threshold.
May be added to control speed and reduce susceptibility to noise spikes.
11
DS005704-18
www.national.com

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