LM101A.PDF

August 2000

LM101A/LM201A/LM301A

Operational Amplifiers

General Description

The LM101A series are general purpose operational amplifi-

ers which feature improved performance over industry stan-

dards like the LM709. Advanced processing techniques

make possible an order of magnitude reduction in input cur-

rents, and a redesign of the biasing circuitry reduces the

temperature drift of input current. Improved specifications in-

clude:

• Offset voltage 3 mV maximum over temperature

(LM101A/LM201A)

• Input current 100 nA maximum over temperature

(LM101A/LM201A)

• Offset current 20 nA maximum over temperature

(LM101A/LM201A)

• Guaranteed drift characteristics

• Offsets guaranteed over entire common mode and sup-

ply voltage ranges

• Slew rate of 10V/µs as a summing amplifier

This amplifier offers many features which make its appli-

cation nearly foolproof: overload protection on the input

and output, no latch-up when the common mode range is

exceeded, and freedom from oscillations and compensa-

tion with a single 30 pF capacitor. It has advantages over

internally compensated amplifiers in that the frequency

compensation can be tailored to the particular applica-

tion. For example, in low frequency circuits it can be over-

compensated for increased stability margin. Or the com-

pensation can be optimized to give more than a factor of

ten improvement in high frequency performance for most

applications.

In addition, the device provides better accuracy and lower

noise in high impedance circuitry. The low input currents

also make it particularly well suited for long interval inte-

grators or timers, sample and hold circuits and low fre-

quency waveform generators. Further, replacing circuits

where matched transistor pairs buffer the inputs of con-

ventional IC op amps, it can give lower offset voltage and

a drift at a lower cost.

The LM101A is guaranteed over a temperature range of

−55˚C to +125˚C, the LM201A from −25˚C to +85˚C, and

the LM301A from 0˚C to +70˚C.

Fast AC/DC Converter (Note 1)

DS007752-33

Note 1: Feedforward compensation can be used to make a fast full wave rectifier without a filter.

DS007752

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Absolute Maximum Ratings (Note 2)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

LM101A/LM201A

LM301A

Supply Voltage

± 22V

± 18V

Differential Input Voltage

± 30V

Input Voltage (Note 3)

± 15V

Output Short Circuit Duration (Note 4)

Continuous

Operating Ambient Temp. Range

−55˚C to +125˚C (LM101A)

0˚C to +70˚C

−25˚C to +85˚C (LM201A)

T J Max

H-Package

150˚C

100˚C

N-Package

150˚C

100˚C

J-Package

150˚C

100˚C

Power Dissipation at T A = 25˚C

H-Package (Still Air)

500 mW

300 mW

(400 LF/Min Air Flow)

1200 mW

700 mW

N-Package

900 mW

500 mW

J-Package

1000 mW

650 mW

Thermal Resistance (Typical)

q jA

H-Package (Still Air)

165˚C/W

(400 LF/Min Air Flow)

67˚C/W

N Package

135˚C/W

J-Package

110˚C/W

110˚CmW

H-Package

25˚C/W

Storage Temperature Range

−65˚C to +150˚C

Lead Temperature (Soldering, 10 sec.)

Metal Can or Ceramic

300˚C

Plastic

260˚C

ESD Tolerance (Note 7)

2000V

Electrical Characteristics (Note 5)

T A =T J

Parameter

Conditions

LM101A/LM201A

LM301A

Units

Min

Typ

Max Min

Typ

Max

Input Offset Voltage

T A = 25˚C, R S

£ 50 k W

0.7

2.0

7.5

Input Offset Current

T A = 25˚C

1.5

3.0

Input Bias Current

T A = 25˚C

250

Input Resistance

T A = 25˚C

1.5

4.0

0.5

2.0

Supply Current

T A = 25˚C

V S = ± 20V

1.8

3.0

V S = ± 15V

1.8

3.0

Large Signal Voltage Gain

T A = 25˚C, V S = ± 15V

160

V/mV

V OUT = ± 10V, R L

Input Offset Voltage

R S

50 k

3.0

Average Temperature Coefficient R S

50 k

3.0

6.0

µV/˚C

of Input Offset Voltage

Input Offset Current

Average Temperature Coefficient 25˚C

T A

T MAX

0.01

0.1

0.01

0.3

nA/˚C

of Input Offset Current

T MIN

T A

25˚C

0.02

0.2

0.02

0.6

nA/˚C

Input Bias Current

0.1

0.3

µA

Supply Current

T A =T MAX ,V S = ± 20V

1.2

2.5

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(Typical)

Electrical Characteristics (Note 5) (Continued)

T A =T J

Parameter

Conditions

LM101A/LM201A

LM301A

Units

Min

Typ

Max Min

Typ

Max

Large Signal Voltage Gain

V S = ± 15V, V OUT = ± 10V

V/mV

R L

Output Voltage Swing

V S = ± 15V

R L =10k

± 12

± 14

± 12

± 14

R L =2k

± 10

± 13

± 10

± 13

Input Voltage Range

V S = ± 20V

± 15

V S = ± 15V

+15,

−13

± 12

+15,

−13

Common-Mode Rejection Ratio

R S

50 k

80 96 70 96 dB

Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.Operating ratings indicate for which the device is functional, but

do no guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guarantee spe-

cific limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is given, however, the typical

value is a good indication of device performance.

Note 3: For supply voltages less than ± 15V, the absolute maximum input voltage is equal to the supply voltage.

Note 4: Continuous short circuit is allowed for case temperatures to 125˚C and ambient temperatures to 75˚C for LM101A/LM201A, and 70˚C and 55˚C respectively

for LM301A.

Note 5: Unless otherwise specified, these specifications apply for C1 = 30 pF, ± 5V £ V S £

R S

50 k

± 20V and −55˚C £ T A £ +125˚C (LM101A), ± 5V £ V S £

± 20V and −25˚C

+70˚C (LM301A).

Note 6: Refer to RETS101AX for LM101A military specifications and RETS101X for LM101 military specifications.

Note 7: Human body model, 100 pF discharged through 1.5 k

T A

+85˚C (LM201A), ± 5V £ V S

± 15V and 0˚C £ T A

Typical Performance Characteristics LM101A/LM201A

Input Voltage Range

Output Swing

Voltage Gain

DS007752-42

DS007752-43

DS007752-41

Guaranteed Performance Characteristics LM301A

Input Voltage Range

Output Swing

Voltage Gain

DS007752-44

DS007752-45

DS007752-46

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Supply Voltage Rejection Ratio

Typical Performance Characteristics

Supply Current

Voltage Gain

Maximum Power Dissipation

DS007752-47

DS007752-48

DS007752-49

Input Current,

LM101A/LM201A/LM301A

Current Limiting

Input Noise Voltage

DS007752-51

DS007752-52

DS007752-50

Input Noise Current

Common Mode Rejection

Power Supply Rejection

DS007752-53

DS007752-54

DS007752-55

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Typical Performance Characteristics (Continued)

Closed Loop Output

Impedance

DS007752-56

Typical Performance Characteristics for Various Compensation Circuits

(Note 9)

Single Pole Compensation

Two Pole Compensation

DS007752-8

C S =30pF

DS007752-12

C S =30pF

C2=10C1

Feedforward Compensation

DS007752-16

f o = 3 MHz

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