LMC7215, LMC7225
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SNOS882E – SEPTEMBER 1999 – REVISED MARCH 2013
LMC7215/LMC7215-Q1/LMC7225 Micro-Power, Rail-to-Rail CMOS Comparators with PushPull/Open-Drain Outputs
Check for Samples: LMC7215, LMC7225
FEATURES
1
(Typical Unless Otherwise Noted)
2
•
•
•
•
•
•
•
•
•
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 5-Pin SOT-23 Package
Latch-up Resistance >300 mA
LMC7215-Q1 is an Automotive Grade Product
that is AEC-Q100 Grade 3 Qualified.
APPLICATIONS
•
•
•
•
•
•
•
•
Laptop Computers
Mobile Phones
Metering Systems
Hand-held Electronics
RC Timers
Alarm and Monitoring Circuits
Window Comparators, Multivibrators
Automotive
DESCRIPTION
The LMC7215/LMC7215-Q1/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/LMC7215-Q1/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/LMC7215-Q1/LMC7225 are designed
for systems where low power consumption is the
critical parameter.
Ensured 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.
Connection Diagrams
Figure 1. 8-Pin SOIC (Top View)
Figure 2. 5-Pin SOT-23 (Top View)
1
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1999–2013, Texas Instruments Incorporated
LMC7215, LMC7225
SNOS882E – SEPTEMBER 1999 – REVISED MARCH 2013
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
ESD Tolerance
(1) (2)
(3)
2 kV
Differential Input Voltage
V+ +0.3V, V− −0.3V
Voltage at Input/Output Pin
V+ +0.3V, V− −0.3V
−
+
Supply Voltage (V –V )
10V
Current at Input Pin
±5 mA
Current at Output Pin
(4)
±30 mA
Current at Power Supply Pin
Lead Temperature
40 mA
(soldering, 10 sec)
260°C
−65°C to +150°C
Storage Temperature Range
Junction Temperature
(1)
(5)
150°C
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications and the test
conditions, see the Electrical Characteristics.
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
Human Body Model, applicable std. MIL-STD-883, Method 3015.7. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of
JEDEC)Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC).
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.
The maximum power dissipation is a function of TJ(MAX), θJA, and TA. The maximum allowable power dissipation at any ambient
temperature isPD = (TJ(MAX) − TA)/θJA. All numbers apply for packages soldered directly into a PC board.
(2)
(3)
(4)
(5)
Operating Ratings
(1)
2V ≤ VCC ≤ 8V
Supply Voltage
Temperature Range
(2)
−40°C to +85°C
Package Thermal Resistance (θJA)
(1)
8-Pin SOIC
165°C/W
5-Pin SOT-23
325°C/W
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications and the test
conditions, see the Electrical Characteristics.
The maximum power dissipation is a function of TJ(MAX), θJA, and TA. The maximum allowable power dissipation at any ambient
temperature isPD = (TJ(MAX) − TA)/θJA. All numbers apply for packages soldered directly into a PC board.
(2)
2.7V to 5V Electrical Characteristics
Unless otherwise specified, all limits specified for TJ = 25°C, V+ = 2.7V to 5V, V− = 0V, VCM = VO = V+/2. Boldface limits apply
at the temperature extremes.
Symbol
Parameter
Conditions
Typ
1
(1)
LMC7215
Limit (2)
LMC7225
Limit (2)
Units
6
6
mV
8
8
max
VOS
Input Offset Voltage
TCVOS
Input Offset Voltage
Average Drift
2
μV/°C
IB
Input Current
5
fA
IOS
Input Offset Current
CMRR
Common Mode
Rejection Ratio
(1)
(2)
(3)
2
See
(3)
1
fA
80
dB
min
60
60
Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not specified on shipped
production material.
All limits are specified by testing or statistical analysis.
CMRR measured at VCM = 0V to 2.5V and 2.5V to 5V when VS = 5V, VCM = 0.2V to 1.35V and 1.35V to 2.7V when VS = 2.7V. This
eliminates units that have large VOS at the VCM extremes and low or opposite VOS at VCM = VS/2.
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2.7V to 5V Electrical Characteristics (continued)
Unless otherwise specified, all limits specified for TJ = 25°C, V+ = 2.7V to 5V, V− = 0V, VCM = VO = V+/2. Boldface limits apply
at the temperature extremes.
Symbol
Parameter
PSRR
Power Supply
Rejection Ratio
AV
Voltage Gain
Conditions
Typ
V+ = 2.2V to 8V
(1)
LMC7215
Limit (2)
LMC7225
Limit (2)
60
60
2.9
2.9
V
2.7
2.7
min
0.0
0.0
V
0.2
0.2
max
5.2
5.2
V
5.0
5.0
min
−0.2
−0.2
V
0.0
0.0
max
1.8
NA
90
dB
3.0
CMRR > 50 dB
V+ = 2.7V
−0.2
Input Common-Mode Voltage CMRR > 50 dB
Range
V+ = 5.0V
5.3
CMRR > 50 dB
V+ = 5.0V
−0.3
CMRR > 50 dB
V+ = 2.2V
2.05
IOH = 1.5 mA
VOH
2.05
2.3
IOH = 2.0 mA
4.8
4.6
IOH = 4.0 mA
0.17
V
0.5
max
0.4
0.4
V
0.5
0.5
max
0.4
0.4
V
0.5
0.5
max
15
NA
mA
V = 5.0V, Sourcing
50
NA
mA
V+ = 2.7V, Sinking
12
mA
V+ = 5.0V, Sinking
30
mA
0.17
V+ = 5.0V
0.2
IOH = 4.0 mA
ISC−
V+ = 2.7V, Sourcing
+
(4)
V
min
0.4
IOH = 2.0 mA
Output Short Circuit Current
min
NA
0.5
V+ = 2.7V
(4)
V
0.4
IOH = 1.5 mA
Output Short Circuit Current
NA
4.5
V+ = 2.2V
ISC+
min
2.2
V+ = 5.0V
Output Voltage Low
V
1.7
V+ = 2.7V
Output Voltage High
VOL
dB
min
140
V+ = 2.7V
CMVR
Units
+
V = 2.2V
ILeakage
nA
VIN+ = 0.1V, VIN− = 0V,
Output Leakage Current
0.01
NA
500
max
0.7
1
1
μA
1.2
1.2
max
VOUT = 15V
IS
(4)
V+ = 5.0V
Supply Current
VIN+ = 5V, VIN− = 0V
Do not short the output of the LMC7225 to voltages greater than 10V or damage may occur.
AC Electrical Characteristics
Unless otherwise specified, TJ = 25°C, V+ = 5V, V− = 0V, VCM = V+/2
Symbol
Parameter
Conditions
LMC7215
Typ (1)
LMC7225
Typ (1) (2)
Units
trise
Rise Time
Overdrive = 10 mV
(2)
1
12.2
μs
tfall
Fall Time
Overdrive = 10 mV
(2)
0.4
0.35
μs
(1)
(2)
Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not specified on shipped
production material.
All measurements made at 10 kHz. A 100 kΩ pull-up resistor was used when measuring the LMC7225. CLOAD = 50 pF including the test
jig and scope probe. The rise times of the LMC7225 are a function of the R-C time constant.
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AC Electrical Characteristics (continued)
Unless otherwise specified, TJ = 25°C, V+ = 5V, V− = 0V, VCM = V+/2
Symbol
tPHL
Parameter
Propagation Delay
(High to Low)
Conditions
See (2)
(3)
V+ = 2.7V (2)
tPLH
Propagation Delay
(Low to High)
See (2)
(3)
V+ = 2.7V (2)
(3)
4
(3)
(3)
LMC7215
Typ (1)
LMC7225
Typ (1) (2)
Units
Overdrive = 10 mV
24
24
μs
Overdrive = 100 mV
12
12
Overdrive = 10 mV
17
17
Overdrive = 100 mV
11
11
Overdrive = 10 mV
24
29
Overdrive = 100 mV
12
17
Overdrive = 10 mV
17
22
Overdrive = 100 mV
11
16
μs
μs
μs
Input step voltage for the propagation measurements is 100 mV.
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SNOS882E – SEPTEMBER 1999 – REVISED MARCH 2013
Typical Performance Characteristics
TA= 25°C unless otherwise specified
Supply Current
vs.
Supply Voltage
Prop Delay
vs.
VSUPPLY
Figure 3.
Figure 4.
Prop Delay
vs.
Overdrive
Short Circuit Current
vs.
VSUPPLY
Figure 5.
Figure 6.
Output Voltage
vs.
Output Current
LMC7215
Output Voltage
vs.
Output Current
Figure 7.
Figure 8.
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Typical Performance Characteristics (continued)
TA= 25°C unless otherwise specified
6
Output Voltage
vs.
Output Current
LMC7215
Output Voltage
vs.
Output Current
Figure 9.
Figure 10.
Output Leakage Current
vs.
Output Voltage
LMC7225
Output Leakage Current
vs.
Output Voltage
LMC7225
Figure 11.
Figure 12.
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SNOS882E – SEPTEMBER 1999 – REVISED MARCH 2013
APPLICATION INFORMATION
RESPONSE TIME
Depending upon the amount of overdrive, the delay will typically 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 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 13 shows a worst case example where a ±5 mV sine wave is applied to
the input. Note that the output is delayed by almost 180°.
Figure 13.
NOISE
Most comparators have rather low gain. This allows the output to spend time between high and low when the
input signal changes slowly. The result is the output may oscillate between high and low when the differential
input is near zero.
The exceptionally high gain of these comparators, 10,000 V/mV, eliminates this problem. Less then 1 μV of
change on the input will drive the output from one rail to the other rail.
If the input signal is noisy, the output cannot ignore the noise unless some hysteresis is provided by positive
feedback.
Figure 14.
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INPUT VOLTAGE RANGE
The LMC7215/25 have input voltage ranges that are larger than the supply voltage ensures 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.
Sensing supply voltage is also easy by connecting one input directly to the supply.
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 result, current will flow through these
forward biased diodes whenever the input voltage is more than a few hundred millivolts larger than the supplies.
Until this occurs, there is essentially no input current. As a result, placing a large resistor in series with any input
that may be exposed to large voltages, will limit the input current but have no other noticeable effect.
If the input current is limited to less than 5 mA by a series resistor, (see Figure 14), 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 comparator.
INPUTS
As mentioned above, these comparators have near zero input 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.
OUTPUT CURRENT
Even though these comparators use less than 1 μA supply current, the outputs are able to drive very large
currents.
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.)
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 important 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 desired, 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.
The thermal resistance of the 8-pin SOIC 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 thermal resistance of the much smaller 5-Pin SOT-23 package 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 8Pin SOIC and 81°C in the 5-Pin SOT-23. This should be kept in mind if driving very low resistance loads.
8
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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 15.) 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.
Figure 15.
Figure 16. RS = 100Ω
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 16 and Figure 17 show what this current 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 18.
If the power supply has a very high impedance, a bypass capacitor of 0.01 μF should be more than enough to
minimize the effects of this small current pulse.
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Figure 17. RS = 10Ω
Figure 18.
LATCH-UP
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 designed 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, visit www.ti.com.
10
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SNOS882E – SEPTEMBER 1999 – REVISED MARCH 2013
REVISION HISTORY
Changes from Revision D (March 2013) to Revision E
•
Page
Changed layout of National Data Sheet to TI format .......................................................................................................... 10
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PACKAGE OPTION ADDENDUM
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30-Sep-2021
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
LMC7215IM/NOPB
ACTIVE
SOIC
D
8
95
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
LMC72
15IM
LMC7215IM5
ACTIVE
SOT-23
DBV
5
1000
Non-RoHS
& Green
Call TI
Level-1-260C-UNLIM
-40 to 85
C02B
LMC7215IM5/NOPB
ACTIVE
SOT-23
DBV
5
1000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
C02B
LMC7215IM5X
ACTIVE
SOT-23
DBV
5
3000
Non-RoHS
& Green
Call TI
Level-1-260C-UNLIM
-40 to 85
C02B
LMC7215IM5X/NOPB
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
C02B
LMC7215IMX/NOPB
ACTIVE
SOIC
D
8
2500
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
LMC72
15IM
LMC7215QIM5/NOPB
ACTIVE
SOT-23
DBV
5
1000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
C02Q
LMC7215QIM5X/NOPB
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
C02Q
LMC7225IM5
ACTIVE
SOT-23
DBV
5
1000
Non-RoHS
& Green
Call TI
Level-1-260C-UNLIM
-40 to 85
C03B
LMC7225IM5/NOPB
ACTIVE
SOT-23
DBV
5
1000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
C03B
LMC7225IM5X/NOPB
ACTIVE
SOT-23
DBV
5
3000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 85
C03B
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of