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LMV7291 Datasheet

Single 1.8V Low Power Comparator with Rail-to-Rail Input

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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


National Semiconductor Electronic Components Datasheet

LMV7291 Datasheet

Single 1.8V Low Power Comparator with Rail-to-Rail Input

No Preview Available !

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
ESD Tolerance
VIN Differential
Supply Voltage (V+ - V)
Voltage at Input/Output pins
Soldering Information
Infrared or Convection (20 sec.)
2KV (Note 2)
200V (Note 6)
±Supply Voltage
5.5V
V+ +0.1V, V−0.1V
235˚C
Wave Soldering (10 sec.)
Storage Temperature Range
Junction Temperature (Note 4)
Operating Ratings (Note 1)
Operating Temperature Range
(Note 3)
Package Thermal Resistance (Note 3)
SC-70
260˚C
−65˚C to +150˚C
+150˚C
−40˚C to +85˚C
265˚C/W
1.8V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 1.8V, V= 0V. Boldface limits apply at the temperature
extremes.
Symbol
Parameter
Condition
Min Typ Max
(Note 5) (Note 4) (Note 5)
Units
VOS Input Offset Voltage
0.3 4 mV
6
TC VOS
IB
IOS
IS
Input Offset Temperature Drift
Input Bias Current
Input Offset Current
Supply Current
VCM = 0.9V (Note 7)
LMV7291
10 uV/C
10 nA
200 pA
9 12
µA
14
ISC
VOH
VOL
VCM
CMRR
PSRR
Output Short Circuit Current
Output Voltage High
Output Voltage Low
Input Common Mode Voltage
Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Sourcing, VO = 0.9V
Sinking, VO = 0.9V
IO = 0.5mA
IO = 1.5mA
IO = −0.5mA
IO = −1.5mA
CMRR > 45 dB
0 < VCM < 1.8V
V+ = 1.8V to 5V
3.5
4
1.7
1.58
−0.1
47
55
6
6
1.74
1.63
52
166
78
80
70
220
1.9
mA
V
mV
V
V
dB
dB
ILEAKAGE Output Leakage Current
VO = 1.8V
2 pA
1.8V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 1.8V, V= 0V, VCM = 0.5V, VO = V+/2 and RL > 1Mto
V. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Min Typ Max
(Note 5) (Note 4) (Note 5)
Units
tPHL Propagation Delay
(High to Low)
Input Overdrive = 20mV
Load = 50pF//5k
880 ns
Input Overdrive = 50mV
Load = 50pF//5k
570 ns
tPLH Propagation Delay
(Low to High)
Input Overdrive = 20mV
Load = 50pF//5k
1100
ns
Input Overdrive = 50mV
Load = 50pF//5k
800 ns
www.national.com
2


Part Number LMV7291
Description Single 1.8V Low Power Comparator with Rail-to-Rail Input
Maker National Semiconductor
Total Page 14 Pages
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