National Semiconductor LMC6442 Technical data

查询LMC6442供应商

LMC6442 Dual Micropower Rail-to-Rail Output Single Supply Operational Amplifier

September 1997

General Description

The LMC6442 is ideal for battery powered systems, where very low supply current (less than one microamp per amplifier) and Rail-to-Rail output swing is required. It is characterized for 2.2V to 10V operation, and at 2.2V supply, the LMC6442 is ideal for single (Li-Ion) or two cell (NiCad or alkaline) battery systems.

The LMC6442 is designed for battery powered systems that require long service life through low supply current, such as smoke and gas detectors, and pager or personal communications systems.

Operation from single supply is enhanced by the wide common mode input voltage range which includes the ground (or negative supply) for ground sensing applications. Very low (5fA, typical) input bias current and near constant supply current over supply voltage enhance the LMC6442’s performance near the end-of-life battery voltage.

Designed for closed loop gains of greater than plus two (or minus one), the amplifier has typically 9.5 KHz GBWP (Gain Bandwidth Product). Unity gain can be used with a simple compensation circuit, which also allows capacitive loads of up to 300 pF to be driven, as described in the Application Notes section.

For compact assembly the LMC6442 is available in the MSOP 8 pin package, about one half the size required by the SOIC 8 pin package. 8 pin DIP and 8 pin SOIC are also available.

Connection Diagram

Key Specifications Features

(Typical, V

n Output Swing to within 30 mV of supply rail n High voltage gain 103 dB n Gain Bandwidth Product 9.5 KHz n Guaranteed for: 2.2V, 5V, 10V n Low Supply Current 0.95 µA/Amplifier n Input Voltage Range −0.3V to V n Power consumption 2.1 µW/Amplifier n Stable for A

=

2.2V)

S

≥+2 or AV≤ −1

V

+

-0.9V

Applications

n Portable instruments n Smoke/gas/CO/fire detectors n Pagers/cell phones n Instrumentation n Thermostats n Occupancy sensors n Cameras n Active badges

DS100064-40

Top View

Ordering Information

Package

8-pin SO-8 LMC6442AIM, LMC6442IM - M08A Rails

Industrial −40˚C to +85˚C Military −55˚C to +125˚C

LMC6442AIMX, LMC6442IMX - M08A

Temperature Range

NSC

Drawing

Supplied

AS

2.5K Tape and Reel

Package Marking

LMC6442AIM LMC6442IM

Ordering Information (Continued)

Package

MSOP LMC6442AIMM, LMC6442IMM - MUA08A Rails

8-pin DIP

8-pin CDIP

10-pin SO

Industrial −40˚C to +85˚C Military −55˚C to +125˚C

LMC6442AIMMX, LMC6442IMMX

LMC6442AIN, LMC6442IN - N08E

Temperature Range

-

- MUA08A

5962-9761301QPA J08A Rails LMC6442AMJ-QML

5962-9761301QXA WG10A Trays LMC6442AMWG-Q

NSC

Drawing

Supplied

AS

3K Tape and Reel

Rails LMC6442AIN,

Package Marking

A08A

LMC6442IN

5962-976130IQPA

9761301QXA

www.national.com 2

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−

): 16V Current at Input Pin (Note 10) Current at Output Pin(Notes 3, 7)

±

Supply Voltages

+

) + 0.3V, (V−) − 0.3V

±

5mA

±

30 mA Lead Temp. (soldering 10 sec) 260˚C Storage Temp. Range: −65˚C to +150˚C Junction Temp. (Note 4) 150˚C

2.2V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions

DC Electrical Characteristics

V

OS

TCV

I

B

I

OS

Input Offset Voltage

Temp. coefficient of input

OS

offset voltage Input Bias Current (Note 14)

Input Offset Current (Note 14)

CMRR Common Mode Rejection

Ratio

C

IN

Common Mode Input Capacitance

PSRR Power Supply Rejection Ratio V

V

CM

A

V

O

I

SC

I

S

Input Common-Mode Voltage Range

Large Signal Voltage Gain Sourcing (Note 11) 100

Output Swing V

Output Short Circuit Current Sourcing, V

Supply Current (2 amplifiers) R

AC Electrical Characteristics

SR Slew Rate (Note 8) 2.2 V/ms

=

25˚C, V

J

−0.1V ≤ V

=

2.5 V to 10V

S

CM

CMRR ≥ 50 dB

Sinking(Note 11) 94

=

0.22V to 2V 103 80 80

V

O

=

100 mV (Note 13)

ID

=

−100 mV (Note 13) 22 60

V

ID

(Notes 12, 13) Sinking, V

(Notes 12, 13)

V

ID

=

open 1.90 2.4

L

+

=

1.8V, R

Operating Ratings(Note 1)

Supply Voltage 1.8V ≤ V Junction Temperature −40˚C Range: LMC6442AI, LMC6442I Thermal Resistance (θ

M Package, 8-pin Surface Mount

MSOP Package 235˚C/W N Package, 8-pin Molded

DIP

+

=

2.2V, V

−

=

0V, V

≤0.5V 92 67

=

100 mV

ID

=

−100 mV

=

open 2.10

L

)

JA

=

V

CM

Typ

(Note 5)

V

O

LMC6442AI

Limit

(Note 6)

−0.75

0.4 µV/˚C

0.005 44

0.0025 22

4.7 pF

95

1.3

−0.3 −0.2

2.18

50 18

50 20

+

/2, and R

±

3

±

4

67

75

1.05

0.95

0

2.15

60

17

19

3.0

<

T

J

=

1MΩto V

L

LMC6442I

Limit

(Note 6)

±

7

±

8

67

75

1.05

0.95

−0.2

0

2.15

60

18

17

20

19

2.6

3.2

≤ 11V

S

<

+85˚C

193˚C/W

115˚C/W

dB min

Units

max

+

mV

pA

dB

min

V

min

V

dB

min

V

min mV

µA

min

µA

/2.

www.national.com3

2.2V Electrical Characteristics (Continued)

Unless otherwise specified, all limits guaranteed for T Boldface limits apply at the temperature extremes.

=

J

25˚C, V

+

=

Symbol Parameter Conditions

AC Electrical Characteristics

GBWP Gain-Bandwidth Product 9.5 KHz

Phase Margin (Note 15) 63 Degree

φ

m

2.2V, V

−

=

0V, V

=

CM

Typ

(Note 5)

=

V

O

LMC6442AI

Limit

(Note 6)

+

/2, and R

=

1MΩto V

L

LMC6442I

Limit

(Note 6)

Units

+

/2.

5V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions

=

J

25˚C, V

+

=

5V, V

−

=

0V, V

=

CM

Typ

(Note 5)

=

V

O

LMC6442AI

+

/2, and R

V

Limit

(Note 6)

=

1MΩto V

L

LMC6442I

Limit

(Note 6)

+

Units

DC Electrical Characteristics

V

OS

TCV

I

B

I

OS

Input Offset Voltage

Temp. coefficient of input

OS

offset voltage Input Bias Current (Note 14)

Input Offset Current (Note 14)

CMRR Common Mode Rejection

Ratio

C

IN

Common Mode Input Capacitance

PSRR Power Supply Rejection Ratio V

V

CM

A

V

Input Common-Mode Voltage Range

Large Signal Voltage Gain Sourcing (Note 11) 100

−0.1V ≤ V

=

2.5 V to 10V

S

−0.75

0.4 µV/˚C

0.005 44

0.0025 22

≤3.5V 102 70

CM

4.1 pF

95

4.1

CMRR ≥ 50 dB

−0.4 −0.2

±

70

75

3.85

3.75

0

3

4

±

70

75

3.85

3.75

−0.2

0

7

8

dB min

Sinking (Note 11) 94

=

0.5V to 4.5V 103 80 80

V

O

V

O

I

SC

I

S

Output Swing V

Output Short Circuit Current Sourcing, V

Supply Current (2 amplifiers) R

=

100 mV

ID

(Note 13)

=

−100 mV

V

ID

(Note 13)

=

100 mV

(Notes 12, 13) Sinking, V

(Notes 12, 13)

L

ID

=

−100 mV

ID

=

open 1.90 2.4

4.99 4.95

20 50

500 300

350 200

4.95

50

200

150

3.0

4.95

50

300

200

150

2.6

3.2

AC Electrical Characteristics

SR Slew Rate (Note 8) 4.1 2.5 2.5 V/ms GBWP Gain-Bandwidth Product 10 KHz

φ

m

THD Total Harmonic Distortion A

Phase Margin (Note 15) 64 Degree

=

+2, f=100 Hz,

V

=

10MΩ,V

R

L

OUT

=

1 Vpp

0.08

/2.

mV

max

pA

max

pA

max

dB

min

V

min

V

max

dB

min

V

min mV

max

µA

min

µA

max

%

www.national.com 4

10V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T

Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions

=

J

25˚C, V

+

=

10V, V

−

=

0V, V

=

CM

Typ

(Note 5)

=

V

O

LMC6442AI

Limit

(Note 6)

+

/2, and R

=

1MΩto V

L

LMC6442I

Limit

(Note 6)

Units

DC Electrical Characteristics

V

OS

TCV

I

B

I

OS

Input Offset Voltage

Temp. coefficient of input

OS

offset voltage Input Bias Current (Note 14)

Input Offset Current (Note 14)

CMRR Common Mode Rejection

Ratio

C

IN

Common Mode Input Capacitance

PSRR Power Supply Rejection Ratio V

V

CM

A

V

Input Common-Mode Voltage Range

Large Signal Voltage Gain Sourcing (Note 11) 120

−0.1V ≤ V

=

2.5 V to 10V

S

−1.5

0.4 µV/˚C

0.005 44

0.0025 22

≤8.5V 105 70

CM

3.5 pF

95

9.1

CMRR ≥ 50 dB

−0.4 −0.2

±

70

75

8.85

8.75

0

3

4

±

70

75

8.85

8.75

−0.2

7

8

dB min

0

Sinking (Note 11) 100

=

0.5V to 9.5V 104 80 80

V

O

V

O

I

SC

I

S

Output Swing V

Output Short Circuit Current Sourcing, V

Supply Current (2 amplifiers) R

=

100 mV

ID

(Note 13)

=

V

−100 mV(Note 13) 22 50

ID

=

100 mV

(Notes 12, 13) Sinking, V

(Notes 12, 13)

L

ID

=

−100 mV

ID

=

open 1.90 2.4

9.99 9.97

2100 1200

900 600

9.97

50

1000

500

3.0

9.97

50

1200

1000

600

500

2.6

3.2

AC Electrical Characteristics

SR Slew Rate(Note 8) 4.1 2.5 2.5 V/ms GBWP Gain-Bandwidth Product 10.5 KHz

φ

m

e

n

i

n

Phase Margin (Note 15) 68 Degree Input-Referred Voltage Noise R

Input-Referred Current Noise R

=

open

L

f=10 Hz

=

open

L

f=10 Hz

170 nV/

0.0002 pA/

Crosstalk Rejection (Note 9) 85 dB

+

/2.

mV

max

pA

max

pA

max

dB

min

V

min

V

max

dB

min

V

min mV

max

µA

min

µA

max

√

Hz

√

Hz

www.national.com5

National Semiconductor LMC6442 Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual