LMC7215MDA [NSC]

IC COMPARATOR, 6000 uV OFFSET-MAX, 24000 ns RESPONSE TIME, UUC, DIE, Comparator;
LMC7215MDA
型号: LMC7215MDA
厂家: National Semiconductor    National Semiconductor
描述:

IC COMPARATOR, 6000 uV OFFSET-MAX, 24000 ns RESPONSE TIME, UUC, DIE, Comparator

放大器
文件: 总17页 (文件大小:466K)
中文:  中文翻译
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National Semiconductor is now part of  
Texas Instruments.  
Search http://www.ti.com/ for the latest technical  
information and details on our current products and services.  
August 2000  
LMC7215/LMC7225  
Micro-Power, Rail-to-Rail CMOS Comparators with  
Push-Pull/Open-Drain Outputs and TinyPak Package  
General Description  
Features  
The LMC7215/LMC7225 are ultra low power comparators  
with a maximum of 1 µA power supply current. They are de-  
signed to operate over a wide range of supply voltages, from  
2V to 8V.  
(Typical unless otherwise noted)  
n Ultra low power consumption 0.7 µA  
n Wide range of supply voltages 2V to 8V  
n Input common-mode range beyond V+ and V−  
n Open collector and push-pull output  
n High output current drive: ( VS = 5V) 45 mA  
n Propagation delay ( VS = 5V, 10 mV overdrive) 25 µs  
The LMC7215/LMC7225 have a greater than rail-to-rail com-  
mon mode voltage range. This is a real advantage in single  
supply applications.  
@
@
The LMC7215 features a push-pull output stage. This fea-  
ture allows operation with absolute minimum amount of  
power consumption when driving any load.  
n Tiny SOT23-5 package  
n Latch-up resistance 300 mA  
>
The LMC7225 features an open drain output. By connecting  
an external resistor, the output of the comparator can be  
used as a level shifter to any desired voltage to as high as  
15V.  
Applications  
n Laptop computers  
n Mobile phones  
n Metering systems  
n Hand-held electronics  
n RC timers  
n Alarm and monitoring circuits  
n Window comparators, multivibrators  
The LMC7215/LMC7225 are designed for systems where  
low power consumption is the critical parameter.  
Guaranteed operation over the full supply voltage range of  
2.7V to 5V and rail-to-rail performance makes this compara-  
tor ideal for battery-powered applications.  
Connection Diagrams  
8–Pin SO–8  
5–Pin SOT23-5  
DS012853-2  
Top View  
DS012853-1  
Top View  
TinyPak is a trademark of National Semiconductor Corporation.  
© 2000 National Semiconductor Corporation  
DS012853  
www.national.com  
Absolute Maximum Ratings (Note 1)  
If Military/Aerospace specified devices are required,  
please contact the National Semiconductor Sales Office/  
Distributors for availability and specifications.  
(soldering, 10 sec)  
260˚C  
−65˚C to +150˚C  
150˚C  
Storage Temperature Range  
Junction Temperature (Note 4)  
Operating Ratings(Note 1)  
ESD Tolerance (Note 2)  
Differential Input Voltage  
Voltage at Input/Output Pin  
Supply Voltage (V+–V)  
Current at Input Pin  
2 kV  
(VCC)+0.3V to (−VCC)−0.3V  
(VCC)+0.3V to (−VCC)−0.3V  
10V  
Supply Voltage  
2V VCC 8V  
Junction Temperature Range  
LMC7215IM, LMC7225IM  
−40˚C TJ +85˚C  
±
5 mA  
Thermal Resistance (θJA  
)
±
Current at Output Pin (Note 3)  
Current at Power Supply Pin  
Lead Temperature  
30 mA  
40 mA  
M Package, 8-Pin Surface Mount  
SOT23-5 Package  
165˚C/W  
325˚C/W  
2.7V to 5V Electrical Characteristics  
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 2.7V to 5V, V= 0V, VCM = VO = V+/2. Boldface limits  
apply at the temperature extremes.  
Typ  
LMC7215  
LMC7225  
Symbol  
VOS  
Parameter  
Conditions  
(Note 5)  
Limit  
Limit  
Units  
(Note 6)  
(Note 6)  
Input Offset Voltage  
1
2
6
6
mV  
max  
8
8
TCVOS  
Input Offset Voltage  
Average Drift  
µV/˚C  
IB  
Input Current  
5
1
fA  
fA  
IOS  
Input Offset Current  
Common Mode  
Rejection Ratio  
Power Supply  
CMRR  
(Note 7)  
V+ = 2.2V to 8V  
80  
60  
60  
60  
60  
dB  
min  
dB  
min  
dB  
V
PSRR  
90  
Rejection Ratio  
Voltage Gain  
AV  
140  
3.0  
CMVR  
Input Common-Mode  
Voltage Range  
V+ = 2.7V  
2.9  
2.7  
0.0  
0.2  
5.2  
5.0  
−0.2  
0.0  
1.8  
1.7  
2.3  
2.2  
4.6  
4.5  
0.4  
0.5  
0.4  
0.5  
0.4  
0.5  
2.9  
2.7  
0.0  
0.2  
5.2  
5.0  
−0.2  
0.0  
NA  
>
CMRR 50 dB  
min  
V
V+ = 2.7V  
−0.2  
5.3  
>
CMRR 50 dB  
max  
V
V+ = 5.0V  
>
CMRR 50 dB  
min  
V
V+ = 5.0V  
−0.3  
2.05  
2.05  
4.8  
>
CMRR 50 dB  
max  
V
VOH  
Output Voltage High  
V+ = 2.2V  
IOH = 1.5 mA  
V+ = 2.7V  
min  
V
NA  
NA  
IOH = 2.0 mA  
V+ = 5.0V  
min  
V
IOH = 4.0 mA  
V+ = 2.2V  
min  
V
VOL  
Output Voltage Low  
0.17  
0.17  
0.2  
0.4  
0.5  
0.4  
0.5  
0.4  
0.5  
NA  
NA  
IOH = 1.5 mA  
V+ = 2.7V  
max  
V
IOH = 2.0 mA  
V+ = 5.0V  
max  
V
IOH = 4.0 mA  
V+ = 2.7V, Sourcing  
V+ = 5.0V, Sourcing  
V+ = 2.7V, Sinking  
max  
mA  
mA  
mA  
ISC+  
Output Short Circuit  
Current (Note 10)  
Output Short Circuit  
15  
50  
12  
ISC−  
www.national.com  
2
2.7V to 5V Electrical Characteristics (Continued)  
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 2.7V to 5V, V= 0V, VCM = VO = V+/2. Boldface limits  
apply at the temperature extremes.  
Typ  
LMC7215  
Limit  
LMC7225  
Limit  
Symbol  
ILeakage  
IS  
Parameter  
Conditions  
(Note 5)  
Units  
(Note 6)  
(Note 6)  
Current (Note 10)  
V+ = 5.0V, Sinking  
V+ = 2.2V  
30  
0.01  
0.7  
mA  
nA  
Output Leakage Current  
V
IN+ = 0.1V, VIN− = 0V,  
NA  
500  
max  
VOUT = 15V  
V+ = 5.0V  
Supply Current  
1
1
µA  
VIN+ = 5V, VIN− = 0V  
1.2  
1.2  
max  
AC Electrical Characteristics  
Unless otherwise specified, TJ = 25˚C, V+ = 5V, V= 0V, VCM = V+/2  
LMC7215  
LMC7225  
Symbol  
Parameter  
Rise Time  
Conditions  
Typ  
(Note 5)  
1
Typ  
Units  
(Notes 5, 8)  
trise  
tfall  
Overdrive = 10 mV (Note 8)  
Overdrive = 10 mV (Note 8)  
12.2  
0.35  
24  
µs  
µs  
µs  
Fall Time  
0.4  
24  
tPHL  
Propagation Delay  
(High to Low)  
(Notes 8, 9)  
Overdrive = 10 mV  
Overdrive = 100 mV  
12  
12  
V+ = 2.7V  
Overdrive = 10 mV  
Overdrive = 100 mV  
Overdrive = 10 mV  
Overdrive = 100 mV  
Overdrive = 10 mV  
Overdrive = 100 mV  
17  
17  
µs  
µs  
µs  
(Notes 8, 9)  
(Notes 8, 9)  
11  
11  
tPLH  
Propagation Delay  
(Low to High)  
24  
29  
12  
17  
V+ = 2.7V  
17  
22  
(Notes 8, 9)  
11  
16  
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-  
tended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.  
Note 2: Human body model, 1.5 kin series with 100 pF.  
Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the  
maximum allowed junction temperature of 150˚C.  
Note 4: The maximum power dissipation is a function of T  
, θ , and T . The maximum allowable power dissipation at any ambient temperature is  
A
J(max) JA  
P
= (T  
− T )/θ . All numbers apply for packages soldered directly into a PC board.  
J(max) A JA  
D
Note 5: Typical values represent the most likely parametric norm.  
Note 6: All limits are guaranteed by testing or statistical analysis.  
Note 7: CMRR measured at V  
= 0V to 2.5V and 2.5V to 5V when V = 5V, V  
= 0.2V to 1.35V and 1.35V to 2.7V when V = 2.7V. This eliminates units that  
CM  
S
C
M
S
have large V  
at the V  
extremes and low or opposite V  
at V  
= V /2.  
OS  
CM  
OS  
CM S  
Note 8: All measurements made at 10 kHz. A 100 kpull-up resistor was used when measuring the LMC7225. C  
= 50 pF including the test jig and scope probe.  
LOAD  
The rise times of the LMC7225 are a function of the R-C time constant.  
Note 9: Input step voltage for the propagation measurements is 100 mV.  
Note 10: Do not short the output of the LMC7225 to voltages greater than 10V or damage may occur.  
3
www.national.com  
Typical Performance Characteristics TA= 25˚C unless otherwise specified  
Supply Current vs  
Supply Voltage  
Prop Delay vs VSupply  
Prop Delay vs Overdrive  
DS012853-12  
DS012853-13  
DS012853-3  
Short Circuit Current vs  
VSupply  
Output Voltage vs Output  
Current LMC7215  
Output Voltage vs  
Output Current  
DS012853-14  
DS012853-15  
DS012853-16  
Output Voltage vs  
Output Current LMC7215  
Output Voltage vs  
Output Current  
Output Leakage Current  
vs Output Voltage  
LMC7225  
DS012853-17  
DS012853-18  
DS012853-19  
www.national.com  
4
The exceptionally high gain of these comparators, 10,000V/  
mV, eliminates this problem. Less then 1 µV of change on  
the input will drive the output from one rail to the other rail.  
Typical Performance  
Characteristics TA= 25˚C unless otherwise  
specified (Continued)  
If the input signal is noisy, the output cannot ignore the noise  
unless some hysteresis is provided by positive feedback.  
Output Leakage Current  
vs Output Voltage  
LMC7225  
DS012853-5  
FIGURE 2.  
INPUT VOLTAGE RANGE  
The LMC7215/25 have input voltage ranges that are larger  
than the supply voltage guarantees that signals from other  
parts of the system cannot overdrive the inputs. This allows  
sensing supply current by connecting one input directly to  
the V+ line and the other to the other side of a current sense  
resistor. The same is true if the sense resistor is in the  
ground return line.  
DS012853-20  
Application Information  
RESPONSE TIME  
Sensing supply voltage is also easy by connecting one input  
directly to the supply.  
Depending upon the amount of overdrive, the delay will typi-  
cally be between 10 µs to 200 µs. The curve showing delay  
vs overdrive in the “Typical Characteristics” section shows  
the delay time when the input is preset with 100 mV across  
the inputs and then is driven the other way by 1 mV to 500  
mV.  
The inputs of these comparators are protected by diodes to  
both supplies. This protects the inputs from both ESD as well  
as signals that greatly exceed the supply voltages. As a re-  
sult, current will flow through these forward biased diodes  
whenever the input voltage is more than a few hundred mil-  
livolts larger than the supplies. Until this occurs, there is es-  
sentially no input current. As a result, placing a large resistor  
in series with any input that may be exposed to large volt-  
ages, will limit the input current but have no other noticeable  
effect.  
The transition from high to low or low to high is fast. Typically  
1 µs rise and 400 ns fall.  
With a small signal input, the comparators will provide a  
square wave output from sine wave inputs at frequencies as  
high as 25 kHz. Figure 1 shows a worst case example where  
±
a
5 mV sine wave is applied to the input. Note that the out-  
If the input current is limited to less than 5 mA by a series re-  
sistor, (see Figure 2), a threshold or zero crossing detector,  
that works with inputs from as low as a few millivolts to as  
high as 5,000V, is made with only one resistor and the com-  
parator.  
put is delayed by almost 180˚.  
INPUTS  
As mentioned above, these comparators have near zero in-  
put current. This allows very high resistance circuits to be  
used without any concern for matching input resistances.  
This also allows the use of very small capacitors in R-C type  
timing circuits. This reduces the cost of the capacitors and  
amount of board space used.  
CAPACITIVE LOADS  
The high output current drive allows large capacitive loads  
with little effect. Capacitive loads as large as 10,000 pF have  
no effect upon delay and only slow the transition by about 3  
µs.  
DS012853-4  
OUTPUT CURRENT  
FIGURE 1.  
Even though these comparators use less than 1 µA supply  
current, the outputs are able to drive very large currents.  
NOISE  
The LMC7215 can source up to 50 mA when operated on a  
5V supply. Both the LMC7215 and LMC7225 can sink over  
20 mA. (See the graph of Max IO vs VSupply in the “Typical  
Characteristics” section.)  
Most comparators have rather low gain. This allows the out-  
put to spend time between high and low when the input sig-  
nal changes slowly. The result is the output may oscillate be-  
tween high and low when the differential input is near zero.  
5
www.national.com  
Application Information (Continued)  
This large current handling ability allows driving heavy loads  
directly. LEDs, beepers and other loads can be driven easily.  
The push-pull output stage of the LMC7215 is a very impor-  
tant feature. This keeps the total system power consumption  
to the absolute minimum. The only current consumed is the  
less than 1 µA supply current and the current going directly  
into the load. No power is wasted in a pull-up resistor when  
the output is low. The LMC7225 is only recommended where  
a level shifting function from one logic level to another is de-  
sired, where the LMC7225 is being used as a drop-in lower  
power replacement for an older comparator or in circuits  
where more than one output will be paralleled.  
POWER DISSIPATION  
The large output current ability makes it possible to exceed  
the maximum operating junction temperature of 85˚C and  
possibly even the absolute maximum junction temperature of  
150˚C.  
DS012853-7  
FIGURE 4. RS = 100Ω  
The thermal resistance of the 8-pin surface mount package  
is 165˚C/W. Shorting the output to ground with a 2.7V supply  
will only result in about 5˚C rise above ambient.  
The LMC7215 produces a small current spike of 300 µA  
peak for about 400 ns with 2.7V supply and 1.8 mA peak for  
400 ns with a 5V supply. This spike only occurs when the  
output is going from high to low. It does not occur when going  
from low to high. Figure 4 and Figure 5 show what this cur-  
rent pulse looks like on 2.7V and 5V supplies. The upper  
trace is the output voltage and the lower trace is the supply  
current as measured with the circuit in Figure 6 .  
The thermal resistance of the much smaller SOT23-5 pack-  
age is 325˚C/W. With a 2.7V supply, the raise is only 10.5˚C  
but if the supply is 5V and the short circuit current is 50 mA,  
this will cause a raise of 41˚C in the SO-8 and 81˚C in the  
SOT23-5. This should be kept in mind if driving very low re-  
sistance loads.  
If the power supply has a very high impedance, a bypass ca-  
pacitor of 0.01 µF should be more than enough to minimize  
the effects of this small current pulse.  
SHOOT-THROUGH  
Shoot-through is a common occurrence on digital circuits  
and comparators where there is a push-pull output stage.  
This occurs when a signal is applied at the same time to both  
the N-channel and P-channel output transistors to turn one  
off and turn the other on. (See Figure 3.) If one of the output  
devices responds slightly faster than the other, the fast one  
can be turned on before the other has turned off. For a very  
short time, this allows supply current to flow directly through  
both output transistors. The result is a short spike of current  
drawn from the supply.  
DS012853-8  
FIGURE 5. RS = 10Ω  
DS012853-6  
FIGURE 3.  
www.national.com  
6
LATCH-UP  
Application Information (Continued)  
In the past, most CMOS IC’s were susceptible to a damaging  
phenomena known as latch-up. This occurred when an ESD  
current spike or other large signal was applied to any of the  
pins of an IC. The LMC7215 and LMC7225 both are de-  
signed to make them highly resistant to this type of damage.  
They have passed qualification tests with input currents on  
any lead up to 300 mA at temperatures up to 125˚C.  
SPICE MODELS  
For a SPICE model of the LMC7215, LMC7225 and many  
other op-amps and comparators, contact the NSC Customer  
Response Center at 800-272-9959 or on the World Wide  
Web at http://www.national.com/models/index.html.  
DS012853-9  
FIGURE 6.  
Ordering Information  
Package  
Ordering  
Information  
LMC7215IM5  
LMC7225IM5  
LMC7215IM5X  
LMC7225IM5X  
LMC7215IM  
NSC Drawing  
Number  
Package  
Marking  
Supplied As  
5-Pin SOT 23-5  
5-Pin SOT 23-5  
5-Pin SOT 23-5  
5-Pin SOT 23-5  
8-Pin SO-8  
MA05A  
C02B  
1k Tape and Reel  
1k Tape and Reel  
3k Tape and Reel  
3k Tape and Reel  
Rails  
MA05A  
MA05A  
MA05A  
M08A  
C03B  
C02B  
C03B  
LMC7215IM  
LMC7225IM  
LMC7215IM  
LMC7225IM  
8-Pin SO-8  
LMC7225IM  
M08A  
Rails  
8-Pin SO-8  
LMC7215IMX  
LMC7225IMX  
M08A  
2.5k Tape and Reel  
2.5k Tape and Reel  
8-Pin SO-8  
M08A  
SOT-23-5 Tape and Reel Specification  
REEL DIMENSIONS  
DS012853-10  
7
www.national.com  
SOT-23-5 Tape and Reel Specification (Continued)  
8 mm  
7.00 0.059 0.512 0.795 2.165 0.331 + 0.059/−0.000 0.567  
W1+ 0.078/−0.039  
W1 + 2.00/−1.00  
W3  
330.00 1.50 13.00 20.20 55.00  
8.40 + 1.50/−0.00  
14.40  
Tape Size  
A
B
C
D
N
W1  
W2  
TAPE FORMAT  
#
Tape Section  
Leader  
Cavities  
Cavity Status  
Empty  
Cover Tape Status  
0 (min)  
Sealed  
Sealed  
Sealed  
Sealed  
Sealed  
Sealed  
(Start End)  
Carrier  
75 (min)  
3000  
Empty  
Filled  
1000  
Filled  
Trailer  
125 (min)  
0 (min)  
Empty  
(Hub End)  
Empty  
TAPE DIMENSIONS  
DS012853-11  
±
±
±
0.315 0.012  
8 mm  
0.130 0.124 0.130 0.126  
0.138 0.002  
0.055 0.004  
0.157  
±
±
±
(3.3) (3.15) (3.3)  
(3.2)  
(3.5 0.05)  
(1.4 0.11)  
(4)  
(8 0.3)  
Tape Size  
DIM  
A
DIM  
Ao  
DIM  
B
DIM  
Bo  
DIM F  
DIM Ko  
DIM  
P1  
DIM W  
www.national.com  
8
Physical Dimensions inches (millimeters) unless otherwise noted  
*
Suffix indicates number of units. See Ordering Information on first page.  
5-Pin SOT Package  
Order Number LMC7215IM5X, LMC7225IM5X, LMC7215IM5 or LMC7225IM5  
NS Package Number MA05A  
9
www.national.com  
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)  
8-Pin Small Outline Package  
Order Number LMC7215IM, LMC7225IM, LMC7215IMX or LMC7225IMX  
NS Package Number M08A  
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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  
into the body, or (b) support or sustain life, and  
whose failure to perform when properly used in  
accordance with instructions for use provided in the  
labeling, can be reasonably expected to result in a  
significant injury to the user.  
2. A critical component is any component of a life  
support device or system whose failure to perform  
can be reasonably expected to cause the failure of  
the life support device or system, or to affect its  
safety or effectiveness.  
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Supply Voltage, max (Volt)  
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production  
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LMC7215.MOD  
N/A  
LMC7215IM  
8
1K+ $0.5400  
of  
LMC72  
15IM  
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95  
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8
5
5
N/A  
N/A  
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1K+ $0.5400  
1K+ $0.5400  
of  
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LMC7215.MOD  
LMC7215 MWA  
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N/A  
General Description  
The LMC7215/LMC7225 are ultra low power comparators with a maximum of 1 µA power supply current.  
They are designed to operate over a wide range of supply voltages, from 2V to 8V.  
The LMC7215/LMC7225 have a greater than rail-to-rail common mode voltage range. This is a real  
advantage in single supply applications.  
The LMC7215 features a push-pull output stage. This feature allows operation with absolute minimum  
amount of power consumption when driving any load.  
The LMC7225 features an open drain output. By connecting an external resistor, the output of the  
comparator can be used as a level shifter to any desired voltage to as high as 15V.  
The LMC7215/LMC7225 are designed for systems where low power consumption is the critical parameter.  
Guaranteed operation over the full supply voltage range of 2.7V to 5V and rail-to-rail performance makes  
this comparator ideal for battery-powered applications.  
Features  
(Typical unless otherwise noted)  
Ultra low power consumption 0.7 µA  
Wide range of supply voltages 2V to 8V  
Input common-mode range beyond V+ and V-  
Open collector and push-pull output  
High output current drive: (@ VS = 5V) 45 mA  
Propagation delay (@ VS = 5V, 10 mV overdrive) 25 µs  
Tiny SOT23-5 package  
Latch-up resistance >300 mA  
Applications  
Laptop computers  
Mobile phones  
Metering systems  
Hand-held electronics  
RC timers  
Alarm and monitoring circuits  
Window comparators, multivibrators  
Design Tools  
Title  
Size in Kbytes Date  
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Download  
View Online  
Amplifiers Selection Guide  
software for Windows  
View  
12-Jun-2002  
7 Kbytes  
If you have trouble printing or viewing PDF file(s), see Printing Problems.  
[Information as of 5-Aug-2002]  
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Products > Analog - Comparators > LMC7225  
LMC7225 Product Folder  
Micro-Power, Rail-to-Rail CMOS Comparators with Open-Drain/Push-Pull Outputs and  
TinyPak Package  
Generic P/N 7225  
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R-R Input  
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Supply Voltage, min (Volt)  
Supply Voltage, max (Volt)  
24  
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Open Drain  
2
Output Current, typ (mA)  
Vos, Room max (mV)  
Input Bias Current, max (nA)  
Special Functions  
30  
6
8
Supply Current per Channel, typ (mA)  
.0007  
1
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LMC7215 LMC7225 Micro-Power, Rail-to-Rail CMOS  
Comparators with Push-Pull Open-Drain Outputs and  
TinyPak Package  
23-  
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LMC7215 LMC7225 Micro-Power, Rail-to-Rail CMOS  
Comparators with Push-Pull Open-Drain Outputs and  
TinyPak Package (JAPANESE)  
297  
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SOT-  
23  
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¢Z¢1¢T  
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5
1K+ $0.5400  
Buy Now  
reel  
of  
3000  
SOT-  
23  
Full  
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C03B  
¢Z¢1¢T  
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LMC7225.MOD  
LMC7225.MOD  
LMC7225IM5X  
LMC7225 MDA  
5
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N/A  
1K+ $0.5400  
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Full  
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Samples  
Die  
-
-
wafer  
jar  
of  
Full  
production  
Wafer  
LMC7225.MOD  
LMC7225 MWA  
N/A  
N/A  
General Description  
The LMC7215/LMC7225 are ultra low power comparators with a maximum of 1 µA power supply current.  
They are designed to operate over a wide range of supply voltages, from 2V to 8V.  
The LMC7215/LMC7225 have a greater than rail-to-rail common mode voltage range. This is a real  
advantage in single supply applications.  
The LMC7215 features a push-pull output stage. This feature allows operation with absolute minimum  
amount of power consumption when driving any load.  
The LMC7225 features an open drain output. By connecting an external resistor, the output of the  
comparator can be used as a level shifter to any desired voltage to as high as 15V.  
The LMC7215/LMC7225 are designed for systems where low power consumption is the critical parameter.  
Guaranteed operation over the full supply voltage range of 2.7V to 5V and rail-to-rail performance makes  
this comparator ideal for battery-powered applications.  
Features  
(Typical unless otherwise noted)  
Ultra low power consumption 0.7 µA  
Wide range of supply voltages 2V to 8V  
Input common-mode range beyond V+ and V-  
Open collector and push-pull output  
High output current drive: (@ VS = 5V) 45 mA  
Propagation delay (@ VS = 5V, 10 mV overdrive) 25 µs  
Tiny SOT23-5 package  
Latch-up resistance >300 mA  
Applications  
Laptop computers  
Mobile phones  
Metering systems  
Hand-held electronics  
RC timers  
Alarm and monitoring circuits  
Window comparators, multivibrators  
Design Tools  
Title  
Size in Kbytes Date  
Receive via Email  
Download  
View Online  
Amplifiers Selection Guide  
software for Windows  
View  
12-Jun-2002  
7 Kbytes  
If you have trouble printing or viewing PDF file(s), see Printing Problems.  
[Information as of 5-Aug-2002]  
Search  
Design  
Purchasing  
Quality  
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Contact Us . Site Terms & Conditions of Use . Copyright 2002 © National Semiconductor Corporation . My Preferences .  
Feedback  

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