LMV7271MGX National Semiconductor, LMV7271MGX Datasheet

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LMV7271MGX

Manufacturer Part Number
LMV7271MGX
Description
Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input
Manufacturer
National Semiconductor
Datasheet

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© 2003 National Semiconductor Corporation
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’s 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.
Typical Circuit
FIGURE 1. Threshold Detector
DS200640
20064024
Features
(V
n Single or Dual Supplies
n Ultra low supply current
n Low input bias current
n Low input offset current
n Low guaranteed V
n Propagation delay
n Input common mode voltage range
n LMV7272 is available in micro SMD package
Applications
n Mobile communications
n Laptops and PDA’s
n Battery powered electronics
n General purpose low voltage applications
S
Part Number Single/Dual
= 1.8V, T
LMV7271
LMV7272
LMV7275
A
= 25˚C, Typical values unless specified).
OS
Single
Single
Dual
micro SMD
Package
SOT23
SOT23
SC70,
SC70,
880ns (20mV overdrive)
0.1V beyond rails
September 2003
9µA per channel
Open Drain
www.national.com
Push/Pull
Push/Pull
Output
200pA
10nA
4mV

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LMV7271MGX Summary of contents

Page 1

... 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’s 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 ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance V Differential IN + − Supply Voltage ( Voltage at Input/Output pins Soldering Information Infrared or Convection (20 sec.) Wave Soldering (10 sec.) 1.8V Electrical Characteristics Unless otherwise specified, all limits guaranteed for T extremes ...

Page 3

Electrical Characteristics Unless otherwise specified, all limits guaranteed for T extremes. Symbol Parameter V Input Offset Voltage Input Offset Temperature Drift OS I Input Bias Current B I Input offset Current OS I Supply Current S ...

Page 4

Electrical Characteristics Unless otherwise specified, all limits guaranteed for T tremes. Symbol Parameter I Supply Current S I Output Short Circuit Current SC V Output Voltage High OH (LMV7271/LMV7272 only) V Output Voltage Low OL V Input Common Voltage ...

Page 5

... Connection Diagrams 5-Pin SOT23/SC70 (LMV7271/LMV7275) Top View Ordering Information Package Part Number 5-Pin SOT23 LMV7271MF LMV7271MFX LMV7275MF LMV7275MFX 5-Pin SC70 LMV7271MG LMV7271MGX LMV7275MG LMV7275MGX 8-Bump LMV7272TL micro SMD LMV7272TLX 20064023 Package Marking C25A 1k Units Tape and Reel 3k Units Tape and Reel C26A ...

Page 6

Typical Performance Characteristics (T = 25˚C, Unless otherwise specified vs vs Supply Current vs. Supply Voltage (LMV7271) www.national.com 20064028 Short Circuit vs. Supply Voltage 20064030 Supply Current vs. Supply Voltage (LMV7272) ...

Page 7

Typical Performance Characteristics Supply Current vs. Supply Voltage (LMV7272) Output Negative Swing vs. V Output Negative Swing vs 25˚C, Unless otherwise specified). (Continued) A Output Positive Swing vs. V 20064032 Output Positive Swing vs. I SUPPLY 20064034 ...

Page 8

Typical Performance Characteristics Output Negative Swing vs. I Output Positive Swing vs. I Propagation Delay (t www.national.com (T = 25˚C, Unless otherwise specified). (Continued) A Output Negative Swing vs. I SINK 20064038 SOURCE 20064040 ) PHL 20064018 8 SINK 20064039 ...

Page 9

Typical Performance Characteristics Propagation Delay (t Propagation Delay (t t vs. Overdrive PLH (T = 25˚C, Unless otherwise specified). (Continued PHL 20064020 ) PHL 20064022 20064049 9 Propagation Delay (t ) PLH 20064016 t vs. Overdrive PHL 20064050 ...

Page 10

Application Notes BASIC COMPARATOR A comparator is often used to convert an analog signal to a digital signal. As shown in Figure 2, the comparator com- pares an input voltage ( reference voltage (V IN LMV7271 RAIL-TO-RAIL ...

Page 11

Application Notes (Continued) FIGURE 3. Inverting Comparator with Hysteresis Non-Inverting Comparator with Hysteresis A non-inverting comparator with hysteresis requires a two resistor network, and a voltage reference (V verting input (Figure 4). When V is low, the output is also ...

Page 12

... The wavelengths, which have the most detri- mental effect, are reds and infrareds. micro SMD MOUNTING The micro SMD package requires specific mounting tech- niques, which are detailed in National Semiconductor Appli- cation Note AN-1112. LMV7272 micro SMD to DIP Conversion Board To facilitate characterization and testing, a micro SMD to DIP conversion board, LMV7272TLCONV, is available ...

Page 13

Typical Applications UNIVERSAL LOGIC LEVEL SHIFTER The output of LMV7275 is an unconnected drain of an NMOS device, which can be pulled up, through a resistor, to any desired output level within the permitted power supply range. Hence, the following ...

Page 14

Typical Applications NEGATIVE PEAK DETECTOR For the negative detector, the output transistor of the com- parator acts as a low impedance current sink. Since there is no pull-up resistor, the only discharge path will be the 1MΩ resistor and any ...

Page 15

Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SOT23-5 NS Package Number MF05A 5-Pin SC70-5 NS Package Number MAA05A 15 www.national.com ...

Page 16

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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