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PDF LMV7291MGX Data sheet ( Hoja de datos )
| Número de pieza | LMV7291MGX | |
| Descripción | Single 1.8V Low Power Comparator with Rail-to-Rail Input | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LMV7291MGX (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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March 2004
LMV7291
Single 1.8V Low Power Comparator with Rail-to-Rail
Input
General Description
The LMV7291 is a rail-to-rail input low power comparator,
characterized at supply voltage 1.8V, 2.7V and 5.0V. It con-
sumes only 9uA supply current per channel while achieving
a 800ns propagation delay.
The LMV7291 is available in SC70 package. With this tiny
package, the PC board area can be significantly reduced. It
is ideal for low voltage, low power and space critical designs.
The LMV7291 features a push-pull output stage which al-
lows operation with minimum power consumption when driv-
ing a load.
The LMV7291 is built with National Semiconductor’s ad-
vance submicron silicon-gate BiCMOS process. It has bipo-
lar inputs for improved noise performance and CMOS out-
puts for rail-to-rail output swing.
Features
(VS = 1.8V, TA = 25˚C, Typical values unless specified).
n Single Supply
n Ultra low supply current
9µA per channel
n Low input bias current
10nA
n Low input offset current
200pA
n Low guaranteed VOS
n Propagation delay
4mV
880ns (20mV overdrive)
n Input common mode voltage range 0.1V beyond rails
Applications
n Mobile communications
n Laptops and PDA’s
n Battery powered electronics
n General purpose low voltage applications
Typical Circuit
20080024
FIGURE 1. Threshold Detector
© 2004 National Semiconductor Corporation DS200800
www.national.com
1 page  
Connection Diagram
5-Pin SC70
Ordering Information
Package
5-Pin SC70
Part Number
LMV7291MG
LMV7291MGX
Top View
20080023
Package Marking
C36
Transport Media
1k Units Tape and Reel
3k Units Tape and Reel
NSC Drawing
MAA05A
5 www.national.com
5 Page 
Application Notes (Continued)
FIGURE 3. Inverting Comparator with Hysteresis
20080042
Non-Inverting Comparator with Hysteresis
A non-inverting comparator with hysteresis requires a two
resistor network, and a voltage reference (VREF) at the in-
verting input (Figure 4). When VIN is low, the output is also
low. For the output to switch from low to high, VIN must rise
up to VIN1, where VIN1 is calculated by
When VIN is high, the output is also high. To make the
comparator switch back to its low state, VIN must equal VREF
before VA will again equal VREF. VIN can be calculated by:
The hysteresis of this circuit is the difference between VIN1
and VIN2.
∆VIN = VCCR1/R2
11 www.national.com
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LMV7291MGX.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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