National Semiconductor LMC7215, LMC7225 Technical data

LMC7215/LMC7225
Micro-Power, Rail-to-Rail CMOS Comparators with

August 2000

LMC7215/LMC7225 Micro-Power, Rail-to-Rail CMOS Comparators with Push-Pull/Open-Drain

Outputs and TinyPak Package

Push-Pull/Open-Drain Outputs and TinyPak

General Description

The LMC7215/LMC7225 are ultra low power comparators
with a maximum of 1 µA power supply current. They are de­signed to operateover 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.

Connection Diagrams

Features

(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: (
n Propagation delay (
n Tiny SOT23-5 package
n Latch-up resistance

@

VS= 5V, 10 mV overdrive) 25 µs

>

300 mA

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

™

Package

@

VS= 5V) 45 mA

8–Pin SO–8

Top View

TinyPak™is a trademark of National Semiconductor Corporation.

DS012853-1

5–Pin SOT23-5

DS012853-2

Top View

© 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/

(soldering, 10 sec) 260˚C
Storage Temperature Range −65˚C to +150˚C
Junction Temperature (Note 4) 150˚C

Distributors for availability and specifications.

ESD Tolerance (Note 2) 2 kV
Differential Input Voltage (V

LMC7215/LMC7225

Voltage at Input/Output Pin (V
Supply Voltage (V

+–V−

) 10V

)+0.3V to (−VCC)−0.3V

CC

)+0.3V to (−VCC)−0.3V

CC

Current at Input Pin
Current at Output Pin (Note 3)
Current at Power Supply Pin 40 mA

±

5mA

±

30 mA

Operating Ratings(Note 1)

Supply Voltage 2V ≤ V
Junction Temperature Range

LMC7215IM, LMC7225IM −40˚C ≤ T
Thermal Resistance (θ
M Package, 8-Pin Surface Mount 165˚C/W

SOT23-5 Package 325˚C/W

)

JA

Lead Temperature

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 Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

V

OS

TCV

OS

I

B

I

OS

CMRR Common Mode (Note 7) 80 60 60 dB

PSRR Power Supply V

A

V

CMVR Input Common-Mode V

V

OH

V

OL

I

SC+

I

SC−

Input Offset Voltage 1 6 6 mV

88max
Input Offset Voltage 2 µV/˚C
Average Drift
Input Current 5 fA
Input Offset Current 1 fA

Rejection Ratio min

+

= 2.2V to 8V 90 60 60 dB
Rejection Ratio min
Voltage Gain 140 dB

+

= 2.7V 3.0 2.9 2.9 V

Voltage Range CMRR

>

+

V
CMRR

+

V
CMRR

+

V
CMRR

50 dB 2.7 2.7 min

= 2.7V −0.2 0.0 0.0 V

>

50 dB 0.2 0.2 max

= 5.0V 5.3 5.2 5.2 V

>

50 dB 5.0 5.0 min

= 5.0V −0.3 −0.2 −0.2 V

>

50 dB 0.0 0.0 max

Output Voltage High V+= 2.2V 2.05 1.8 NA V

I

= 1.5 mA 1.7 min

OH

+

V

= 2.7V 2.05 2.3 NA V

I

= 2.0 mA 2.2 min

OH

+

V

= 5.0V 4.8 4.6 NA V

I

= 4.0 mA 4.5 min

OH

Output Voltage Low V+= 2.2V 0.17 0.4 0.4 V

I

= 1.5 mA 0.5 0.5 max

OH

+

V

= 2.7V 0.17 0.4 0.4 V

I

= 2.0 mA 0.5 0.5 max

OH

+

V

= 5.0V 0.2 0.4 0.4 V

I

= 4.0 mA 0.5 0.5 max

OH

Output Short Circuit V+= 2.7V, Sourcing 15 NA mA
Current (Note 10) V

+

= 5.0V, Sourcing 50 NA mA

Output Short Circuit V+= 2.7V, Sinking 12 mA

CC

≤ +85˚C

J

≤ 8V

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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 LMC7225

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

+

= 5.0V, Sinking 30 mA

V

+ = 0.1V, VIN− = 0V, 0.01 NA 500 max

IN

V

= 15V

OUT

V

+ = 5V, VIN−=0V 1.2 1.2 max

IN

I

Leakage

I

S

Current (Note 10) V
Output Leakage Current V+= 2.2V nA

Supply Current V+= 5.0V 0.7 1 1 µA

AC Electrical Characteristics

Unless otherwise specified, TJ= 25˚C, V+= 5V, V−= 0V, VCM=V+/2

LMC7215 LMC7225

Symbol Parameter Conditions Typ Typ Units

(Note 5) (Notes 5, 8)

t

rise

t

fall

t

PHL

t

PLH

Note 1: 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 guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.

Note 2: Human body model, 1.5 kΩ in 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
P

=(T

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

have large V
Note 8: Allmeasurements made at 10 kHz.A100 kΩ pull-upresistor was used whenmeasuring the LMC7225. C

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.

Rise Time Overdrive = 10 mV (Note 8) 1 12.2 µs
Fall Time Overdrive = 10 mV (Note 8) 0.4 0.35 µs
Propagation Delay (Notes 8, 9) Overdrive = 10 mV 24 24 µs
(High to Low) Overdrive = 100 mV 12 12

+

V

= 2.7V Overdrive = 10 mV 17 17 µs

(Notes 8, 9) Overdrive = 100 mV 11 11
Propagation Delay (Notes 8, 9) Overdrive = 10 mV 24 29 µs
(Low to High) Overdrive = 100 mV 12 17

+

V

= 2.7V Overdrive = 10 mV 17 22 µs

(Notes 8, 9) Overdrive = 100 mV 11 16

, θJA, and TA. The maximum allowable power dissipation at any ambient temperature is

J(max)−TA

)/θJA. All numbers apply for packages soldered directly into a PC board.

= 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

at the VCMextremes and low or opposite VOSat VCM=VS/2.

OS

CM

J(max)

= 50 pF including the testjig and scope probe.

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LMC7215/LMC7225

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