LMV7271/LMV7275/LMV7272 Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input
September 2003
LMV7271/LMV7275/LMV7272
Single & Dual, 1.8V Low Power Comparators with
Rail-to-Rail Input
General Description
The LMV727X are rail-to-rail input low power comparators,
which are characterized at supply voltage 1.8V, 2.7V and
5.0V. They consume only 9uA supply current per channel
while achieving a 800ns propagation delay.
The LMV7271/LMV7275 (single) are available in SC70 and
SOT23 packages. The LMV7272 (dual) is available in micro
SMD package. With these tiny packages, the PC board area
can be significantly reduced. They are ideal for low voltage,
low power and space critical designs.
The LMV7271/LMV7272 both feature a push-pull output
stage which allows operation with minimum power consump-
tion when driving a load. The LMV7275 features an open
drain output stage that allows for wired-OR configurations.
The open drain output also offers the advantage of allowing
the output to be pulled to any voltage up to 5V, regardless of
the supply voltage of the LMV7275.
The LMV727X are built with National Semiconductor鈥檚 ad-
vance submicron silicon-gate BiCMOS process. They all
have bipolar inputs for improved noise performance and
CMOS outputs for rail-to-rail output swing.
Features
(V
S
= 1.8V, T
A
= 25藲C, Typical values unless specified).
n
Single or Dual Supplies
n
Ultra low supply current
9碌A(chǔ) per channel
n
Low input bias current
10nA
n
Low input offset current
200pA
n
Low guaranteed V
OS
4mV
n
Propagation delay
880ns (20mV overdrive)
n
Input common mode voltage range
0.1V beyond rails
n
LMV7272 is available in micro SMD package
Applications
n
n
n
n
Mobile communications
Laptops and PDA鈥檚
Battery powered electronics
General purpose low voltage applications
Typical Circuit
Part Number Single/Dual
LMV7271
LMV7272
LMV7275
Single
Dual
Single
Package
SC70,
SOT23
micro SMD
SC70,
SOT23
Output
Push/Pull
Push/Pull
Open Drain
20064024
FIGURE 1. Threshold Detector
漏 2003 National Semiconductor Corporation
DS200640
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