NSC LMC6762MWC, LMC6762BIN, LMC6762BIMX, LMC6762AIMX, LMC6762BIM Datasheet

LMC6762 Dual MicroPower Rail-To-Rail Input CMOS Comparator with Push-Pull Output

General Description

The LMC6762 is an ultra low power dual comparator with a maximum supply current of 10 µA/comparator. It is designed to operate over a wide range of supply voltages, from 2.7V to 15V. The LMC6762 has guaranteed specs at 2.7V to meet the demands of 3V digital systems.

The LMC6762 has an input common-mode voltage range which exceeds both supplies. This is a significant advantage in low-voltage applications. The LMC6762 also features a push-pull output that allows direct connections to logic devices without a pull-up resistor.

A quiescent power consumption of 50 µW/amplifier (

5V) makes the LMC6762 ideal for applications in portable phones and hand-held electronics. The ultra-low supply current is also independent of power supply voltage. Guaranteed operation at 2.7V and a rail-to-rail performance makes this device ideal for battery-powered applications.

Refer to the LMC6772 datasheet for an open-drain version of this device.

Features

(Typical unless otherwise noted) n Low power consumption (max): I

10 µA/comp

n Wide range of supply voltages: 2.7V to 15V n Rail-to-rail input common mode voltage range n Rail-to-rail output swing (Within 100 mV of the supplies,

2.7V, and I

LOAD

2.5 mA)

n Short circuit protection: 40 mA n Propagation delay (

5V, 100 mV

overdrive): 4 µs

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

Connection Diagram

Ordering Information

Package Temperature Range NSC Drawing Transport

−40˚C to +85˚C Media

8-Pin Molded DIP LMC6762AIN, LMC6762BIN N08E Rails 8-Pin Small Outline LMC6762AIM, LMC6762BIM M08A Rails

LMC6762AIMX, LMC6762BIMX M08A Tape and Reel

8-Pin DIP/SO

DS012320-1

Top View

July 1997

LMC6762 Dual MicroPower Rail-To-Rail Input CMOS Comparator with Push-Pull Output

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

)+0.3V to (V−)−0.3V

Voltage at Input/Output Pin (V

)+0.3V to (V−)−0.3V

Supply Voltage (V

+–V−

) 16V

Current at Input Pin

5mA

Current at Output Pin

(Notes 7, 3)

30 mA

Current at Power Supply Pin,

LMC6762 40 mA

Lead Temperature

(Soldering, 10 seconds) 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

≤ 15V

Junction Temperature Range

LMC6762AI, LMC6762BI −40˚C ≤ T

≤ +85˚C

Thermal Resistance (θ

) N Package, 8-Pin Molded DIP 100˚C/W M Package, 8-Pin Surface Mount 172˚C/W

2.7V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

25˚C, V

2.7V, V

−

0V, V

/2. Boldface limits apply at the

temperature extremes.

Symbol Parameter Conditions

Typ

(Note 5)

LMC6762AI LMC6762BI Units

Limit Limit

(Note 6) (Note 6)

Input Offset Voltage 3 5 15 mV

818max

TCV

Input Offset Voltage 2.0 µV/˚C Temperature Drift Input Offset Voltage (Note 8) 3.3 µV/Month Average Drift

Input Current 0.02 pA

Input Offset Current 0.01 pA CMRR Common Mode Rejection Ratio 75 dB PSRR Power Supply Rejection Ratio

1.35V<V

7.5V 80 dB

Voltage Gain (By Design) 100 dB V

Input Common-Mode CMRR>55 dB 3.0 2.9 2.9 V

Voltage Range 2.7 2.7 min

−0.3 −0.2 −0.2 V

0.0 0.0 max

Output Voltage High I

LOAD

2.5 mA 2.5 2.4 2.4 V

2.3 2.3 min

Output Voltage Low I

LOAD

2.5 mA 0.2 0.3 0.3 V

0.4 0.4 max

Supply Current For Both Comparators 12 20 20 µA

(Output Low) 25 25 max

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5.0V and 15.0V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

25˚C, V

5.0V and 15.0V, V

−

0V, V

/2. Boldface limits

apply at the temperature extremes.

Symbol Parameter Conditions

Typ

(Note 5)

LMC6762AI LMC6762BI

UnitsLimit Limit

(Note 6) (Note 6)

Input Offset Voltage 3 5 15 mV

818max

TCV

Input Offset Voltage V

5V 2.0 µV/˚C

Temperature Drift V

15V 4.0

Input Offset Voltage V

5V (Note 8) 3.3 µV/Month

Average Drift V

15V (Note 8) 4.0

Input Current V=5V 0.04 pA

Input Offset Current V

5V 0.02 pA

CMRR Common Mode V

5V 75 dB

Rejection Ratio V

15V 82 dB

PSRR Power Supply Rejection Ratio

2.5V<V

5V 80 dB

Voltage Gain (By Design) 100 dB

Input Common-Mode V

5.0V 5.3 5.2 5.2 V

Voltage Range CMRR

55 dB 5.0 5.0 min

−0.3 −0.2 −0.2 V

0.0 0.0 max

15.0V 15.3 15.2 15.2 V

CMRR

55 dB 15.0 15.0 min

−0.3 −0.2 −0.2 V

0.0 0.0 max

Output Voltage High V

5V 4.8 4.6 4.6 V

LOAD

5mA 4.45 4.45 min

15V 14.8 14.6 14.6 V

LOAD

5mA 14.45 14.45 min

Output Voltage Low V

5V 0.2 0.4 0.4 V

LOAD

5mA 0.55 0.55 max

15V 0.2 0.4 0.4 V

LOAD

5mA 0.55 0.55 max

Supply Current For Both Comparators 12 20 20 µA

(Output Low) 25 25 max

Short Circuit Current Sourcing 30 mA

Sinking, V

12V 45

(Note 7)

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AC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

25˚C, V

5V, V

−

0V, V

/2. Boldface limits apply at

the temperature extreme.

Symbol Parameter Conditions Typ

(Note 5)

LMC6762AI LMC6762BI Units

Limit Limit

(Note 6) (Note 6)

RISE

Rise Time f=10 kHz, C

50 pF, 0.3 µs

Overdrive=10 mV (Notes 9, 10)

FALL

Fall Time f=10 kHz, C

50 pF, 0.3 µs

Overdrive=10 mV (Notes 9, 10)

PHL

Propagation Delay f=10 kHz, Overdrive = 10 mV 10 µs (High to Low) C

50 pF Overdrive = 100 mV 4 µs (Notes 9, 10) V

2.7V, Overdrive = 10 mV 10 µs f=10 kHz, C

50 pF Overdrive = 100 mV 4 µs

(Notes 9, 10)

PLH

Propagation Delay f=10 kHz, Overdrive = 10 mV 6 µs (Low to High) C

50 pF Overdrive = 100 mV 4 µs (Notes 9, 10) V

2.7V, Overdrive = 10 mV 7 µs f=10 kHz, C

50 pF Overdrive = 100 mV 4 µs

(Notes 9, 10)

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

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: Do not short circuit output to V

, when V+is greater than 12V or reliability will be adversely affected.

Note 8: Input Offset Voltage Average Drift is calculated by dividing the accelerated operating life drift average by the equivalent operational time. The Input Offset Voltage Average Drift represents the input offset voltage change at worst-case input conditions.

Note 9: C

includes the probe and jig capacitance.

Note 10: The rise and fall times are measured with a 2V input step. The propagation delays are also measured with a 2V input step.

Typical Performance Characteristics V

5V, Single Supply, T

25˚C unless otherwise specified

Supply Current vs Supply Voltage (Output High)

DS012320-20

Supply Current vs Supply Voltage (Output Low)

DS012320-21

Input Current vs Common-Mode Voltage

DS012320-22

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