National Semiconductor LMC6042 Technical data

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LMC6042 CMOS Dual Micropower Operational Amplifier

August 1999

General Description

Ultra-low power consumption and low input-leakage current are the hallmarks of the LMC6042. Providing input currents of only 2 fA typical, the LMC6042 can operate from a single supply, has output swing extending to each supply rail, and an input voltage range that includes ground.

The LMC6042 is ideal for use in systems requiring ultra-low power consumption. In addition, the insensitivity to latch-up, high output drive, and output swing to ground without requiring external pull-down resistors make it ideal for single-supply battery-powered systems.

Other applications for the LMC6042 include bar code reader amplifiers, magnetic and electric field detectors, and hand-held electrometers.

This device is built with National’s advanced Double-Poly Silicon-Gate CMOS process.

See the LMC6041 for a single, and the LMC6044 for a quad amplifier with these features.

Connection Diagram

8-Pin DIP/SO

Ordering Information

Temperature

Package

8-Pin LMC6042AIM M08A Rail Small Outline LMC6042IM Tape and Reel 8-Pin LMC6042AIN N08E Rail Molded DIP LMC6042IN

Range NSC

Industrial Drawing

−40˚C to +85˚C

Features

n Low supply current: 10 µA/Amp (typ) n Operates from 4.5V to 15V single supply n Ultra low input current: 2 fA (typ) n Rail-to-rail output swing n Input common-mode range includes ground

Applications

n Battery monitoring and power conditioning n Photodiode and infrared detector preamplifier n Silicon based transducer systems n Hand-held analytic instruments n pH probe buffer amplifier n Fire and smoke detection systems n Charge amplifier for piezoelectric transducers

DS011137-1

Transport

Media

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.

Differential Input Voltage Supply Voltage (V Output Short Circuit to V Output Short Circuit to V

+−V−

) 16V

−

Lead Temperature

(Soldering, 10 seconds) 260˚C Current at Input Pin Current at Output Pin Current at Power Supply Pin 35 mA Power Dissipation (Note 3)

Supply Voltage

(Note 12)

(Note 2)

18 mA

5mA

Storage Temperature Range −65˚C to +150˚C Junction Temperature (Note 3) 110˚C ESD Tolerance (Note 4) 500V Voltage at Input/Output Pin (V

) + 0.3V, (V−) − 0.3V

Operating Ratings

Temperature Range

LMC6042AI, LMC6042I −40˚C ≤ T Supply Voltage 4.5V ≤ V Power Dissipation (Note 10) Thermal Resistance (θ

), (Note 11)

8-Pin DIP 101˚C/W

8-Pin SO 165˚C/W

≤ +85˚C

J +

≤ 15.5V

Electrical Characteristics

Unless otherwise spec ified, all limits guaranteed for T 5V, V

−

0V, V

1.5V, V

/2 and R

1M unless otherwise specified.

25˚C. Boldface limits apply at the temperature extremes. V

Typical LMC6042AI LMC6042I Units

Symbol Parameter Conditions (Note 5) Limit Limit (Limit)

(Note 6) (Note 6)

Input Offset Voltage 1 3 6 mV

3.3 6.3 Max

TCV

Input Offset Voltage 1.3 µV/˚C

Average Drift

R CMRR Common Mode 0V ≤ V

+PSRR Positive Power Supply 5V ≤ V

−PSRR Negative Power Supply 0V ≤ V

CMR Input Common-Mode V

Input Bias Current 0.002 44pA (Max) Input Offset Current 0.001 22pA (Max) Input Resistance

Rejection Ratio V

≤ 12.0V 75 68 62 dB

15V 66 60 Min

≤ 15V 75 68 62 dB

2.5V 66 60 Min

−

≤ −10V 94 84 74 dB

2.5V 83 73 Min

O +

5V and 15V −0.4 −0.1 −0.1 V

10 TeraΩ

Voltage Range For CMRR ≥ 50 dB 00Max

−1.9V V+− 2.3V V+− 2.3V V

Large Signal R

100 kΩ (Note 7) Sourcing 1000 400 300 V/mV

− 2.5V V+− 2.4V Min

Voltage Gain 300 200 Min

Sinking 500 180 90 V/mV

120 70 Min

25 kΩ (Note 7) Sourcing 1000 200 100 V/mV

160 80 Min

Sinking 250 100 50 V/mV

60 40 Min

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Electrical Characteristics (Continued)

Unless otherwise spec ified, all limits guaranteed for T 5V, V

−

0V, V

1.5V, V

/2 and R

1M unless otherwise specified.

25˚C. Boldface limits apply at the temperature extremes. V

Typical LMC6042AI LMC6042I Units

Symbol Parameter Conditions (Note 5) Limit Limit (Limit)

(Note 6) (Note 6)

Output Swing V

5V 4.987 4.970 4.940 V

100 kΩ to V

/2 4.950 4.910 Min

0.004 0.030 0.060 V

0.050 0.090 Max

5V 4.980 4.920 4.870 V

25 kΩ to V

/2 4.870 4.820 Min

0.010 0.080 0.130 V

0.130 0.180 Max

15V 14.970 14.920 14.880 V

100 kΩ to V

/2 14.880 14.820 Min

0.007 0.030 0.060 V

0.050 0.090 Max

15V 14.950 14.900 14.850 V

25 kΩ to V

/2 14.850 14.800 Min

0.022 0.100 0.150 V

0.150 0.200 Max

Output Current Sourcing, V

5V 10 8 Min

Sinking, V

0V 22 16 13 mA

5V 21 16 13 mA

88Min

Output Current Sourcing, V

15V 10 10 Min

Sinking, V

0V 40 15 15 mA

13V 39 24 21 mA

(Note 12) 88Min

Supply Current Both Amplifiers 20 34 45 µA

1.5V 39 50 Max

Both Amplifiers 26 44 56 µA

15V 51 65 Max

AC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for T 5V, V

−

0V, V

1.5V, V

/2 and R

1M unless otherwise specified.

25˚C. Boldface limits apply at the temperature extremes. V

Typ LMC6042AI LMC6042I Units

Symbol Parameter Conditions (Note 5) Limit Limit (Limit)

(Note 6) (Note 6)

SR Slew Rate (Note 8) 0.02 0.015 0.010 V/µs

0.010 0.007 Min

GBW Gain-Bandwidth Product 100 kHz

Phase Margin 60 Deg Amp-to-Amp Isolation (Note 9) 115 dB

Input-Referred

Voltage Noise

Input-Referred Current Noise

f=1 kHz 83

f=1 kHz 0.0002

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AC Electrical Characteristics (Continued)

Unless otherwise specified, all limits guaranteed for T 5V, V

−

0V, V

1.5V, V

/2 and R

1M unless otherwise specified.

25˚C. Boldface limits apply at the temperature extremes. V

Typ LMC6042AI LMC6042I Units

Symbol Parameter Conditions (Note 5) Limit Limit (Limit)

(Note 6) (Note 6)

T.H.D. Total Harmonic Distortion f=1 kHz, A

100 kΩ,V

5V Supply

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Conditions indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed.

Note 2: Applies to both single-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature of 110˚C. Output currents in excess of

Note 3: The maximum powerdissipationisa function of T

−TA)/θJA.

Note 4: Human body model, 1.5 kΩ in series with 100 pF. Note 5: Typical values represent the most likely parametric norm. Note 6: All limits are guaranteed at room temperature (standard type face) or at operating temperature extremes (bold face type).

Note 7: V Note 8: V Note 9: Input referred V Note 10: For operating at elevated temperatures the device must be derated based on the thermal resistance θ Note 11: All numbers apply for packages soldered directly into a PC board. Note 12: Do not connect output to V

15V, V 15V. Connected as Voltage Follower with 10V step input. Number specified is the slower of the positive and negative slew rates.

7.5V and R

connected to 7.5V. For Sourcing tests, 7.5V ≤ VO≤ 11.5V. For Sinking tests, 2.5V ≤ VO≤ 7.5V.

15V and R

100 kΩ connected to V

when V+is greater than 13V or reliability may be adversely affected.

30 mA over long term may adversely affect reliability.

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

J(Max)

−5

/2. Each amp excited in turn with 100 Hz to produce V

0.01

with P

12 V

)/θJA.

J−TA

J(Max)

Typical Performance Characteristics V

Supply Current vs Supply Voltage

DS011137-19

Input Bias Current vs Input Common-Mode Voltage

Offset Voltage vs Temperature of Five Representative Units

Input Common-Mode Voltage Range vs Temperature

7.5V, T

25˚C unless otherwise specified

Input Bias Current vs Temperature

DS011137-20

DS011137-21

Output Characteristics Current Sinking

DS011137-22

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DS011137-23

DS011137-24

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