NSC LMC7211MWC, LMC7211BIMX, LMC7211BIM5X, LMC7211BIM5, LMC7211BIM Datasheet

LMC7211
Tiny CMOS Comparator with Rail-to-Rail Input and
Push-Pull Output

General Description

The LMC7211 is a micropower CMOS comparator available
in thespace saving SOT23-5 package. This makes the com­parator ideal for space and weight critical designs. The
LMC7211is supplied in two offset voltage grades, 5 mV and
15 mV.

The main benefits of the Tiny package are most apparent in
small portable electronic devices, such as mobile phones,
pagers, notebook computers, personal digital assistants,
and PCMCIA cards. The rail-to-rail input voltage makes the
LMC7211 a good choice for sensor interfacing, such as light
detector circuits, optical and magnetic sensors, and alarm
and status circuits.

The Tiny Comparator’s outside dimensions (length x width x
height) of 3.05mm x 3.00mm x 1.43mm allow it to fit into tight
spaces on PC boards.

Features

n Tiny SOT 23-5 package saves space
n Package is less than 1.43 mm thick
n Guaranteed specs at 2.7V, 5V, 15V supplies
n Typical supply current 7 µA at 5V
n Response time of 4 µs at 5V
n LMC7211—push-pull output
n Input common-mode range beyond V− and V+
n Low input current

Applications

n Battery Powered Products
n Notebooks and PDAs
n PCMCIA cards
n Mobile Communications
n Alarm and Security circuits
n Direct Sensor Interface
n Replaces amplifiers used as comparators with better

performance and lower current

Connection Diagrams

Package Ordering NSC Drawing Package Transport Media

Information Number Marking

8-Pin SO-8

LMC7211AIM M08A LM7211AIM Rails
LMC7211AIMX M08A LM7211AIM 2.5k Units Tape and Reel
LMC7211BIM M08A LM7211BIM Rails
LMC7211BIMX M08A LM7211BIM 2.5k Units tape and Reel

5-Pin SOT 23-5

LMC7211AIM5 MA05A C00A 1k Units Tape and Reel
LMC7211AIM5X MA05A C00A 3k Units Tape and Reel
LMC7211BIM5 MA05A C00B 1k Units Tape and Reel
LMC7211BIM5X MA05A C00B 3k Units Tape and Reel

8-Pin SO-8

DS012337-1

Top View

5-Pin SOT23-5

DS012337-2

Top View

September 1999

LMC7211 Tiny CMOS Comparator with Rail-to-Rail Input and Push-Pull Output

© 1999 National Semiconductor Corporation DS012337 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.

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

CC

) +0.3V to (−VCC)−0.3V

Voltage at Input/Output Pin (V

CC

) + 0.3V to (−VCC)−0.3V

Supply Voltage (V

+–V−

) 16V

Current at Input Pin (Note 7)

±

5mA

Current at Output Pin

(Notes 3, 8)

±

30 mA
Current at Power Supply Pin 40 mA
Lead Temperature

(soldering, 10 sec) 260˚C

Storage Temperature Range −65˚C to +150˚C
Junction Temperature

(Note 4) 150˚C

Operating Ratings (Note 1)

Supply Voltage 2.7 ≤ V

CC

≤ 15V

Junction Temperature Range
LMC7211AI, LMC7211BI −40˚C ≤ T

J

≤ +85˚C

Thermal Resistance (θ

JA

)
SO-8 Package,
8-Pin Surface Mount 180˚C/W
M05A Package,
5-Pin Surface Mount 325˚C/W

2.7V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

J

=

25˚C, V

+

=

2.7V, V

−

=

0V, V

CM

=

V

O

=

V+/2. Boldface limits apply

at the temperature extremes.

Typ LMC7211AI LMC7211BI

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

V

OS

Input Offset Voltage 3 5 15 mV

818max

TCV

OS

Input Offset Voltage 1.0 µV/˚C
Temperature Drift
Input Offset Voltage (Note 10) 3.3 µV/Month
Average Drift

I

B

Input Current 0.04 pA

I

OS

Input Offset Current 0.02 pA

CMRR Common Mode 0V ≤ V

CM

≤ 2.7V 75 dB

Rejection Ratio

PSRR Power Supply 2.7V ≤ V

+

≤ 15V 80 dB

Rejection Ratio

A

V

Voltage Gain 100 dB

CMVR Input Common-Mode CMRR

>

55 dB 3.0 2.9 2.9 V

Voltage Range 2.7 2.7 min

CMRR

>

55 dB −0.3 −0.2 −0.2 V

0.0 0.0 max

V

OH

Output Voltage High I

load

=

2.5 mA 2.5 2.4 2.4 V

2.3 2.3 min

V

OL

Output Voltage Low I

load

=

2.5 mA 0.2 0.3 0.3 V

0.4 0.4 max

I

S

Supply Current V

OUT

=

Low 7 12 12 µA

14 14 max

5.0V and 15.0V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

J

=

25˚C, V

+

=

5.0V and 15V, V

−

=

0V, V

CM

=

V

O

=

V

+

/2. Boldface lim-

its apply at the temperature extremes.

Typ LMC7211AI LMC7211BI

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

V

OS

Input Offset Voltage 3 5 15 mV

818max

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5.0V and 15.0V Electrical Characteristics (Continued)

Unless otherwise specified, all limits guaranteed for T

J

=

25˚C, V

+

=

5.0V and 15V, V

−

=

0V, V

CM

=

V

O

=

V

+

/2. Boldface lim-

its apply at the temperature extremes.

Typ LMC7211AI LMC7211BI

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

TCV

OS

Input Offset Voltage V

+

=

5V 1.0 µV/˚C

Temperature Drift V

+

=

15V 4.0

Input Offset Voltage V

+

=

5V 3.3 µV/Month

Average Drift V

+

=

15V 4.0

I

B

Input Current 0.04 pA

I

OS

Input Offset Current 0.02 pA

CMRR Common Mode V+=5.0V 75 dB

Rejection Ration V+=15.0V 82 dB

PSRR Power Supply 5V ≤ V

+

≤ 10V 80 dB

Rejection Ratio

A

V

Voltage Gain 100 dB

CMVR Input Common-Mode V+=5.0V 5.3 5.2 5.2 V

Voltage Range CMRR

>

55 dB 5.0 5.0 min
V+=5.0V −0.3 −0.2 −0.2 V
CMRR

>

55 dB 0.0 0.0 max
V+=15.0V 15.3 15.2 15.2 V
CMRR

>

55 dB 15.0 15.0 min
V+=15.0V −0.3 −0.2 −0.2 V
CMRR

>

55 dB 0.0 0.0 max

V

OH

Output Voltage High V+=5V 4.8 4.6 4.6 mV

I

load

=

5mA 4.45 4.45 min
V+=15V 14.8 14.6 14.6 mV
I

load

=

5mA 14.45 14.45 min

V

OL

Output Voltage Low V+=5V 0.2 0.40 0.40 mV

I

load

=

5mA 0.55 0.55 max
V+=15V 0.2 0.40 0.40 mV
I

load

=

5mA 0.55 0.55 max

I

S

Supply Current V

OUT

=

Low 7 14 14 µA

18 18 max

I

SC

Short Circuit Current Sourcing 30 mA

Sinking (Note 8) 45 mA

AC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

J

=

25˚C, V

+

=

5V, V

−

=

0V, V

CM

=

V

O

=

V

+

/2. Boldface limits apply at

the temperature extreme.

Typ LMC7211AI LMC7211BI

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

t

rise

Rise Time f=10 kHz, Cl=50 pF, 0.3 µs

Overdrive=10 mV (Note 9)

t

fall

Fall Time f=10 kHz, Cl=50 pF, 0.3 µs

Overdrive=10 mV (Note 9)

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AC Electrical Characteristics (Continued)

Unless otherwise specified, all limits guaranteed for T

J

=

25˚C, V

+

=

5V, V

−

=

0V, V

CM

=

V

O

=

V

+

/2. Boldface limits apply at

the temperature extreme.

Typ LMC7211AI LMC7211BI

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

t

PHL

Propagation Delay f=10 kHz, 10 mV 10 µs
(High to Low) Cl=50 pF 100 mV 4
(Note 11) (Note 9)

V+=2.7V, 10 mV 10 µs
f=10 kHz, 100 mV 4
Cl=50 pF
(Note 9)

t

PLH

Propagation Delay f=10 kHz, 10 mV 6 µs
(Low to High) Cl=50p 100 mV 4
(Note 11) (Note 9)

V+=2.7V, 10 mV 7 µs
f=10 kHz, 100 mV 4
Cl=50 pF
(Note 9)

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. Output currents in excess of

±

30 mA over long term may adversely affect reliability.

Note 4: The maximum power dissipation is a function of T

J(max)

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

P

D

=

(T

J(max)−TA

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

Note 5: Typical values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: Limiting input pin current is only necessary for input voltages that exceed absolute maximum input voltage rating.
Note 8: Do not short circuit output to V+, when V+ is greater than 12V or reliability will be adversely affected.
Note 9: C

L

includes the probe and jig capacitance.

Note 10: Input offset voltage average drift is calculated by dividing the accelerated operating life V

OS

drift by the equivalent operational time. This represents worst

case input conditions and includes the first 30 days of drift.

Note 11: Input step voltage for propagation delay measurement is 2V.

Typical Performance Characteristics Single Supply T

A

=

25˚C unless specified

Supply Current vs
Supply Voltage

DS012337-15

Supply Current vs
Temperature while Sourcing

DS012337-16

Supply Current vs
Temperature while Sinking

DS012337-17

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