NSC LMC6684BIM, LMC6684AIM, LMC6682BIN, LMC6682BIM, LMC6682AIN Datasheet

LMC6681 Single/LMC6682 Dual/LMC6684 Quad Low Voltage, Rail-To-Rail Input and Output CMOS Amplifier with Powerdown

May 1995

LMC6681 Single/LMC6682 Dual/LMC6684 Quad Low Voltage, Rail-To-Rail Input and Output CMOS

Amplifier with Powerdown

General Description

The LMC6681/2/4 is a high performance operational amplifier which can operate over a wide range of supply voltages, with guaranteed specifications at 1.8V, 2.2V, 3V, 5V, and 10V.

The LMC6681/2/4 provides an input common-mode voltage range that exceeds both supplies. The rail-to-rail output swing of the amplifier assures maximum dynamic signal range. This rail-to-rail performance of the amplifier, combined with its high open-loop voltage gain makes it unique among CMOS rail-to-rail amplifiers. The LMC6681/2/4 is an excellent choice for circuits where the common-mode voltage range is a concern.

The LMC6681/2/4 has a powerdown mode which can be controlled externally. In this powerdown mode, the supply current decreases from 700 µA per amplifier to less than 1 µA per amplifier. The LMC6684 has two powerdown options. Each of the powerdown pins disables two amplifiers.

The LMC6681/2/4 has been designed specifically to improve system performance in low voltage applications. The amplifier’s 80 fA input current, 0.5 mV offset voltage, and 82 dB CMRR maintain accuracy in battery-powered systems.

Connection Diagrams

8-Pin DIP/SO

Features

(Typical unless otherwise noted)

n Guaranteed Specs at 1.8V, 2.2V, 3V, 5V, 10V n Rail-to-Rail Input Common-Mode Voltage Range n Rail-to-Rail Output Swing

(within 10 mV of supply rail,

n Powerdown Mode I

(Guaranteed at V

n Ultra Low Input Current 80 fA n High Voltage Gain (V n Unity Gain Bandwidth 1.2 MHz

S OFF

=

1.8V, 2.2V, 3V, and 5V)

S

=

S

=

@

V

3V and R

S

≤ 1.5 µA/Amplifier

=

3V, R

10 kΩ): 120 dB

L

Applications

n Battery Operated Circuits n Sensor Amplifiers n Portable Communication Devices n Medical Instrumentation n Battery Monitoring Circuits n Level Detectors, Sample-and-Hold Circuits

14-Pin DIP/SO

=

10 kΩ)

DS012042-1

Top View

16-Pin DIP/SO

DS012042-3

Top View

DS012042-2

Ordering Information

Package Temperature Range NSC Transport

8-Pin Molded DIP LMC6681AIN, LMC6681BIN N08E Rails 8-Pin Small Outline LMC6681AIM, LMC6681BIM M08A Rails

14-Pin Molded DIP LMC6682AIN, LMC6682BIN N14A Rails 14-Pin Small Outline LMC6682AIM, LMC6682BIM M14A Rails

16-Pin Molded DIP LMC6684AIN, LMC6684BIN N16A Rails 16-Pin Small Outline LMC6684AIM, LMC6684BIM M16A Rails

Industrial, −40˚C to +85˚C Drawing Media

LMC6681AIMX, LMC6681B1MX M08A Tape and Reel

LMC6682AIMX, LMC6682BIMX M14A Tape and Reel

LMC6684AIMX, LMC6684BIMX M16A Tape and Reel

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

+

− V−) 12V Current at Input Pin (Note 11) Current at Output Pin (Note 3)

Supply Voltage

+

) +0.3V, (V−) −0.3V

±

5mA

±

30 mA Current at Power Supply Pin 35 mA Lead Temp. (soldering, 10 sec.) 260˚C Storage Temperature Range −65˚C to +150˚C Junction Temperature (Note 4) 150˚C

3V DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T 1MΩ.Boldface limits apply at the temperature extremes (Note 16).

J

=

25˚C, V

Operating Ratings (Note 1)

Supply Voltage 1.8V ≤ V Junction Temperature Range

LMC6681AI, LMC6681BI −40˚C ≤ T LMC6682AI, LMC6682BI −40˚C ≤ T LMC6684AI, LMC6684BI −40˚C ≤ T

Thermal Resistance (θ

N Package, 8-pin Molded DIP 108˚C/W M Package, 8-pin Surface Mount 172˚C/W N Package, 14-pin Molded DIP 88˚C/W M Package, 14-pin Surface Mount 126˚C/W N Package, 16-pin Molded DIP 83˚C/W M Package, 16-pin Surface Mount 114˚C/W

+

=

3.0V, V−=0V, V

)

JA

=

CM

+

=

V

O

/2, V

PD

=

0.6V and R

≤ 10V

S

≤ +85˚C

J

≤ +85˚C

J

≤ +85˚C

J

LMC6681AI LMC6681BI LMC6682AI LMC6682BI LMC6684AI LMC6684BI

Limit Limit

Units

Symbol Parameter Conditions

Typ

(Note 5)

(Note 6) (Note 6)

V

OS

Input Offset Voltage 0.5 1 3 mV

2.5 4.5 max

TCV

Input Offset Voltage 1.5 µV/˚C

OS

Average Drift

I

B

I

OS

R

IN

C

IN

Input Current (Note 12) 0.08 20 20 pA max Input Offset Current (Note 12) 0.04 10 10 pA max Input Resistance

>

1 Tera Ω

Input Capacitance 3 pF

CMRR Common Mode (Note 13) 82 70 65 dB

Rejection Ratio 65 62 min

PSRR Power Supply

Rejection Ratio V

V

CM

Input Common Mode CMRR>50 dB 3.23 3.18 3.18 V

±

1.5V ≤ VS≤±2.5V 82 70 65 dB

+

=

/2=V

V

O

CM

65 62 min

Voltage Range 3.00 3.00 min

−0.3 −0.18 −0.18 V

0.00 0.00 max

A

V

O

Large Signal Voltage Gain

Output Swing R

=

R

600Ω (Notes 7, 12) 70 10 10 V/mV

L

=

R

10 kΩ (Notes 7, 12) 1000 12 12 V/mV

L

=

L

600Ω to V

+

/2 2.87 2.70 2.70 V

2.58 2.58 min

0.15 0.3 0.3 V

0.42 0.42 max

2kΩto V

+

/2 2.95 2.85 2.85 V

=

R

L

2.79 2.79 min

0.05 0.15 0.15 V

0.21 0.21 max

R

L

=

10 kΩ to V

+

/2 2.99 2.94 2.94 V

2.91 2.91 min

0.01 0.04 0.04 V

0.05 0.05 max

>

L

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3V DC Electrical Characteristics (Continued)

Unless otherwise specified, all limits guaranteed for T 1MΩ.Boldface limits apply at the temperature extremes (Note 16).

Symbol Parameter Conditions

I

SC

Output Short Sourcing, V Circuit Current 6.7 6.7 min

Sinking, V

I

SON

Supply Current Single, LMC6681 0.7 1.13 1.13 mA when Powered ON V

=

1.5V 1.36 1.36 max

CM

Dual, LMC6682 1.4 2.26 2.26 mA

=

V

1.5V 2.75 2.75 max

CM

Quad, LMC6684 2.8 4.52 4.52 mA

=

V

1.5V 5.42 5.42 max

I

S OFF

Supply Current Single, LMC6681 0.5 1.5 1.5 µA when Powered OFF V

CM

=

2.3V 2.1 2.1 max

PD

Dual, LMC6682 0.5 1.5 1.5 µA

=

V

2.3V 2.1 2.1 max

PD

Quad, LMC6684 1.0 3.0. 3.0 µA

=

V

2.3V 4.2 4.2 max

PD

=

25˚C, V

J

=

0V 20 9.0 9.0 mA

O

=

3V 12 6.0 6.0 mA

O

+

=

3.0V, V−=0V, V

Typ

(Note 5)

+

=

V

CM

V

O

/2, V

=

PD

0.6V and R

LMC6681AI LMC6681BI LMC6682AI LMC6682BI LMC6684AI LMC6684BI

Limit Limit

(Note 6) (Note 6)

4.5 4.5 min

L

Units

>

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1.8V and 2.2V DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

@

2.2V), V

(

=

@

1.8V) and R

0.3V (

PD

>

1MΩ.Boldface limits apply at the temperature extremes (Note 16).

L

=

25˚C, V+=1.8V and 2.2V, V−=0V, V

J

CM

+

=

V

O

/2, V

=

0.4V

PD

LMC6681AI LMC6681BI

Typ LMC6682AI LMC6682BI

Symbol Parameter Conditions (Note 5) LMC6684AI LMC6684BI Units

Limit Limit

(Note 6) (Note 6)

+

V

OS

Input Offset Voltage V

=

1.8V, V

+

=

V

2.2V, V

=

1.5V 0.5 3 10 mV max

CM

=

1.5V 0.5 2 6 mV

CM

3.8 7.8 max

+

TCV

Input Offset Voltage V

OS

=

2.2V 1.5 µV/˚C

Average Drift

+

I

B

I

OS

Input Current V Input Offset Current V

CMRR Common Mode V

Rejection Ratio V

PSRR Power Supply

Rejection Ratio V

V

CM

Input Common Mode V Voltage Range −0.15 0.0 0.0 V max

V

O

Output Swing V

=

2.2V (Note 12) 0.08 20 20 pA max

+

=

2.2V (Note 12) 0.04 10 10 pA max

+

=

2.2V (Note 13) 82 60 60 dB min

+

=

1.8V (Note 13) 82 50 50 dB min

±

1.1V ≤ VS≤±5V, 82 70 65 dB

+

=

/2=V

V

O +

=

CMRR

+

=

V CMRR

+

= =

R

L

2.2V

>

1.8V

>

CM

40 dB

2.38 2.2 2.2 V min

1.98 1.8 1.8 V min

−0.10 0.0 0.0 V max

2.2V 2.15 2.0 2.0 V

+

2kΩto V

/2 1.88 1.88 min

65 62 min

0.05 0.2 0.2 V

0.32 0.32 max

+

=

V

1.8V 1.75 1.6 1.6 V

=

R

2kΩto V

L

+

/2 1.44 1.44 min

0.05 0.2 0.2 V

0.32 0.32 max

I

SON

Supply Current Single, LMC6681 0.7 1.1 1.1 mA when Powered ON V

=

1.5V 1.32 1.32 max

CM

Dual, LMC6682 1.4 2.2 2.2 mA

=

V

1.5V 2.7 2.7 max

CM

Quad, LMC6684 2.8 4.4 4.4 mA

=

V

1.5V 5.3 5.3 max

I

S OFF

Supply Current Single, LMC6681 0.5 1.5 1.5 µA when Powered OFF V

CM

=

1.5V 2.7 2.7 max

PD

Dual, LMC6682 0.5 1.5 1.5 µA

=

V

1.5V 2.7 2.7 max

PD

Quad, LMC6684 1.0 3.0 3.0 µA

=

V

1.5V 5.4 5.4 max

PD

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5V DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T 1MΩ.Boldface limits apply at the temperature extremes (Note 16).

=

J

25˚C, V

+

=

5.0V, V−=0V, V

+

=

V

CM

V

O

/2, V

=

PD

0.9V and R

LMC6681AI LMC6681BI LMC6682AI LMC6682BI LMC6684AI LMC6684BI

Limit Limit

Units

Symbol Parameter Conditions

Typ

(Note 5)

(Note 6) (Note 6)

V

OS

Input Offset Voltage V

=

1.5V 0.5 1 3 mV

CM

2.5 4.5 max

TCV

OS

Input Offset Voltage 1.5 µV/˚C Average Drift

I

B

I

OS

R

IN

C

IN

Input Current (Note 12) 0.08 20 20 pA max Input Offset Current (Note 12) 0.04 10 10 pA max Input Resistance

>

1 Tera Ω

Input Capacitance 3 pF

CMRR Common Mode (Note 13) 82 70 65 dB

Rejection Ratio 65 62 min

PSRR Power Supply Rejection

Ratio V

V

CM

Input Common Mode CMRR>50 dB 5.3 5.18 5.18 V

±

1.5V ≤ VS≤±2.5V 82 70 65 dB

+

=

/2=V

V

O

CM

65 62 min

Voltage Range 5.00 5.00 min

−0.3 −0.18 −0.18 V

0.00 0.00 max

V

O

Output Swing R

=

L

2kΩto V

+

/2 4.9 4.85 4.85 V

4.58 4.58 min

0.05 0.2 0.2 V

0.28 0.28 max

I

SON

Supply Current Single, LMC6681 0.8 1.24 1.24 mA when Powered ON V

=

1.5V 1.49 1.49 max

CM

Dual, LMC6682 1.5 2.48 2.48 mA

=

V

1.5V 3.00 3.00 max

CM

Quad, LMC6684 3.0 4.96 4.96 mA

=

V

1.5V 6.00 6.00 max

I

S OFF

Supply Current Single, LMC6681 0.5 1.5 1.5 µA when Powered OFF V

CM

=

4.3V 2.1 2.1 max

PD

Dual, LMC6682 0.5 1.5 1.5 µA

=

V

4.3V 2.1 2.1 max

PD

Quad, LMC6684 1.0 3.0 3.0 µA

=

V

4.3V 4.2 4.2 max

PD

>

L

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10V DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

>

1MΩ.Boldface limits apply at the temperature extremes (Note 16).

=

J

25˚C, V

+

=

10.0V, V−=0V, V

+

=

V

CM

V

O

/2, V

PD

=

1.2V and R

LMC6681AI LMC6681BI LMC6682AI LMC6682BI LMC6684AI LMC6684BI

Limit Limit

Units

Symbol Parameter Conditions

Typ

(Note 5)

(Note 6) (Note 6)

V

OS

Input Offset Voltage V

=

1.5V 0.5 1.5 3.5 mV

CM

3.0 5.0 max

TCV

Input Offset Voltage 1.5 µV/˚C

OS

Average Drift

I

B

I

OS

R

IN

C

IN

Input Current (Note 12) 0.08 20 20 pA max Input Offset Current (Note 12) 0.04 10 10 pA max Input Resistance

>

1 Tera Ω

Input Capacitance 3 pF

CMRR Common Mode (Note 13) 82 65 65 dB

Rejection Ratio 62 62 min

PSRR Positive Power Supply

Rejection Ratio V

V

CM

Input Common Mode CMRR>50 dB 10.30 10.18 10.18 V

±

1.1V ≤ VS≤±5V 82 70 65 dB

+

=

/2 65 62 min

V

O

Voltage Range 10.00 10.00 min

−0.30 −0.18 −0.18 V

0.00 0.00 max

V

O

Output Swing R

=

L

2kΩto V

+

/2 9.93 9.7 9.7 V

9.58 9.58 min

0.08 0.3 0.3 V

0.42 0.42 max

A

V

Large Signal R

=

L

2kΩto V

+

/2 Sourcing 89 25 25 V/mV

Voltage Gain (Note 12) Sinking 224 25 25 V/mV

I

SC

Output Short Circuit Sourcing, V

=

0V 65 30 30 mA

O

Current (Note 14) 22 22 min

Sinking, V

=

10V 70 30 30 mA

O

(Note 14) 22 22 min

I

SON

Supply Current Single, LMC6681 0.9 1.50 1.50 mA when Powered ON V

=

1.5V 1.8 1.8 max

CM

Dual, LMC6682 1.6 3.00 3.00 mA

=

V

1.5V 3.6 3.6 max

CM

Quad, LMC6684 3.2 6.00 6.00 mA

=

V

1.5V 7.2 7.2 max

I

S OFF

Supply Current Single, LMC6681 0.5 5 5 µA when Powered OFF V

CM

=

9.3V 77max

PD

Dual, LMC6682 0.5 5 5 µA

=

V

9.3V 77max

PD

Quad, LMC6684 1.0 10 10 µA

=

V

9.3V 14 14 max

PD

L

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Powerdown DC Threshold Characteristics

Boldface limits apply at the temperature extremes (Note 16).

Symbol Parameter Conditions

+

V

PD, IL

PD, IH

Powerdown Voltage Input Low (Device V Powered ON; Amplifier meets all V specs in the datasheet tables) V

Powerdown Voltage Input High (Device V Powered OFF; Refer to DC Electrical V Characteristics for I

specs) V

S OFF

=

2.2V 0.4 V

−

=

0V 0.25

+

=

3V 0.6 V

−

=

V

0V 0.45

+

=

V

5V 0.9 V

−

=

V

0V 0.75

+

=

V

10V 1.2 V

−

=

V

0V 1.05

+

=

2.2V 1.5 V

−

=

0V 1.65

+

=

3V 2.3 V

−

=

V

0V 2.45

+

=

V

5V 4.3 V

−

=

V

0V 4.45

+

=

V

10V 9.3 V

−

=

V

0V 9.45

LMC6681AI, LMC6681BI LMC6682AI, LMC6682BI LMC6684AI, LMC6684BI

Min Typ Max

Units

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