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PDF LMC6762 Data sheet ( Hoja de datos )
| Número de pieza | LMC6762 | |
| Descripción | Dual MicroPower Rail-To-Rail Input CMOS Comparator with Push-Pull Output | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LMC6762 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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July 1997
LMC6762
Dual MicroPower Rail-To-Rail Input CMOS Comparator
with Push-Pull Output
General Description
The LMC6762 is an ultra low power dual comparator with a
maximum supply current of 10 µA/comparator. It is designed
to operate over a wide range of supply voltages, from 2.7V to
15V. The LMC6762 has guaranteed specs at 2.7V to meet
the demands of 3V digital systems.
The LMC6762 has an input common-mode voltage range
which exceeds both supplies. This is a significant advantage
in low-voltage applications. The LMC6762 also features a
push-pull output that allows direct connections to logic de-
vices without a pull-up resistor.
A quiescent power consumption of 50 µW/amplifier
(@ V+ = 5V) makes the LMC6762 ideal for applications in
portable phones and hand-held electronics. The ultra-low
supply current is also independent of power supply voltage.
Guaranteed operation at 2.7V and a rail-to-rail performance
makes this device ideal for battery-powered applications.
Refer to the LMC6772 datasheet for an open-drain version
of this device.
Features
(Typical unless otherwise noted)
n Low power consumption (max): IS = 10 µA/comp
n Wide range of supply voltages: 2.7V to 15V
n Rail-to-rail input common mode voltage range
n Rail-to-rail output swing (Within 100 mV of the supplies,
@ V+ = 2.7V, and ILOAD = 2.5 mA)
n Short circuit protection: 40 mA
n Propagation delay (@ V+ = 5V, 100 mV
overdrive): 4 µs
Applications
n Laptop computers
n Mobile phones
n Metering systems
n Hand-held electronics
n RC timers
n Alarm and monitoring circuits
n Window comparators, multivibrators
Connection Diagram
8-Pin DIP/SO
DS012320-1
Top View
Ordering Information
Package
8-Pin Molded DIP
8-Pin Small Outline
Temperature Range
−40˚C to +85˚C
LMC6762AIN, LMC6762BIN
LMC6762AIM, LMC6762BIM
LMC6762AIMX, LMC6762BIMX
NSC Drawing
N08E
M08A
M08A
Transport
Media
Rails
Rails
Tape and Reel
© 1999 National Semiconductor Corporation DS012320
www.national.com
1 page  
Typical Performance Characteristics V+ = 5V, Single Supply, TA = 25˚C unless otherwise
specified (Continued)
Input Current vs
Common-Mode Voltage
Input Current vs
Common-Mode Voltage
Input Current
vs Temperature
∆VOS vs ∆VCM
DS012320-23
∆VOS vs ∆VCM
DS012320-24
∆VOS vs ∆VCM
DS012320-25
DS012320-26
Output Voltage vs
Output Current (Sourcing)
DS012320-27
Output Voltage vs
Output Current (Sourcing)
DS012320-28
Output Voltage vs
Output Current (Sourcing)
DS012320-29
DS012320-30
DS012320-31
5 www.national.com
5 Page 
Typical Applications (Continued)
FIGURE 10. Time Delay Generator
DS012320-18
The circuit shown above provides output signals at a pre-
scribed time interval from a time reference and automatically
resets the output when the input returns to ground. Consider
the case of VIN = 0. The output of comparator 4 is also at
ground. This implies that the outputs of comparators 1, 2,
and 3 are also at ground. When an input signal is applied,
the output of comparator 4 swings high and C charges expo-
nentially through R. This is indicated above.
The output voltages of comparators 1, 2, and 3 switch to the
high state when VC1 rises above the reference voltage VA,
VB and VC. A small amount of hysteresis has been provided
to insure fast switching when the RC time constant is chosen
to give long delay times.
11 www.national.com
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LMC6762.PDF ] | |
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