LMV7251 Datasheet, PDF (1/11 Pages) National Semiconductor (TI) – 1.8V Low Voltage Comparator with Rail-to-Rail Input

January 2001
LMV7251/LMV7255
1.8V Low Voltage Comparator with Rail-to-Rail Input
General Description
The LMV7251/LMV7255 are rail-to-rail input low voltage
comparators, which can operate at supply voltage range of
1.8V to 5.0V. The LMV7251/LMV7255 are available in space
saving SC-70 or SOT23-5 packages. These comparators
are ideal for low voltage and space critical designs.
The LMV7251 features a push-pull output stage. This feature
allows operation with minimum power consumption when
driving a load.
The LMV7255 features an open drain output. This allows the
connection of an external resistor at the output. The output of
the comparator can be used as a level shifter.
The IC’s are built with National Semiconductor’s advance
Submicron Silicon-Gate BiCMOS process. The
LMV7251/LMV7255 have bipolar inputs for improved noise
performance and CMOS outputs for better rail-to-rail output
performance.
Features
(V_S = 1.8V, T_A = 25˚C, Typical values unless specified).
n Single or Dual Supplies
n Low supply voltage
1.8V to 5.0V
n Ultra low supply current
11µA
n Low input bias current
14nA
n Low input offset current
200pA
n Low input offset voltage
+/−0.3mV
n Response time
670ns (20mV overdrive)
n Input common mode voltage
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
Connection Diagram
DS200057-2
FIGURE 1. Threshold Detector
Top View
DS200057-1
© 2001 National Semiconductor Corporation DS200057
www.national.com