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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.

Supply Voltage

±

22V

Internal Power Dissipation (Note 2)

500 mW

Differential Input Voltage

±

5V

Input Voltage (Note 3)

±

22V

Storage Temperature Range

−65˚C to +150˚C

Lead Temperature

(Soldering, 10 Sec.)

260˚C

Maximum Junction Temperature

150˚C

Operating Temperature Range

T

A(MIN)

T

A(MAX)

LM725

−55˚C

to

+125˚C

LM725A

−55˚C

to

+125˚C

LM725C

0˚C

to

+70˚C

Electrical Characteristics

(Note 4)

Parameter

Conditions

LM725A

LM725

LM725C

Units

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

Input Offset Voltage

T

A

= 25˚C,

0.5

0.5

1.0

0.5

2.5

mV

(Without External Trim)

R

S

10 k

Input Offset Current

T

A

= 25˚C

2.0

5.0

2.0

20

2.0

35

nA

Input Bias Current

T

A

= 25˚C

42

80

42

100

42

125

nA

Input Noise Voltage

T

A

= 25˚C

f

o

= 10 Hz

15

15

15

nV/

Hz

f

o

= 100 Hz

9.0

9.0

9.0

nV/

Hz

f

o

= 1 kHz

8.0

8.0

8.0

nV/

Hz

Input Noise Current

T

A

= 25˚C

f

o

= 10 Hz

1.0

1.0

1.0

pA/

Hz

f

o

= 100 Hz

0.3

0.3

0.3

pA/

Hz

f

o

= 1 kHz

0.15

0.15

0.15

pA/

Hz

Input Resistance

T

A

= 25˚C

1.5

1.5

1.5

M

Input Voltage Range

T

A

= 25˚C

±

13.5

±

14

±

13.5

±

14

±

13.5

±

14

V

Large Signal Voltage
Gain

T

A

= 25˚C,

R

L

2 k

,

1000

3000

1000

3000

250

3000

V/mV

V

OUT

=

±

10V

Common-Mode

T

A

= 25˚C,

120

110

120

94

120

dB

Rejection Ratio

R

S

10 k

Power Supply

T

A

= 25˚C,

2.0

5.0

2.0

10

2.0

35

µV/V

Rejection Ratio

R

S

10 k

Output Voltage Swing

T

A

= 25˚C,

R

L

10 k

±

12.5

±

13.5

±

12

±

13.5

±

12

±

13.5

V

R

L

2 k

±

12.0

±

13.5

±

10

±

13.5

±

10

±

13.5

V

Power Consumption

T

A

= 25˚C

80

105

80

105

80

150

mW

Input Offset Voltage

R

S

10 k

0.7

1.5

3.5

mV

(Without External Trim)

Average Input Offset

R

S

= 50

Voltage Drift

2.0

2.0

5.0

2.0

µV/˚C

(Without External Trim)

Average Input Offset

R

S

= 50

Voltage Drift

0.6

1.0

0.6

0.6

µV/˚C

(With External Trim)

Input Offset Current

T

A

= T

MAX

1.2

4.0

1.2

20

1.2

35

nA

T

A

= T

MIN

7.5

18.0

7.5

40

4.0

50

nA

Average Input Offset

35

90

35

150

10

pA/˚C

Current Drift

Input Bias Current

T

A

= T

MAX

20

70

20

100

125

nA

T

A

= T

MIN

80

180

80

200

250

nA

www.national.com

2

Summary of Contents for LM725

Page 1: ...LM725C has slightly relaxed specifications and has its performance guaranteed over a 0 C to 70 C temperature range Features n High open loop gain 3 000 000 n Low input voltage drift 0 6 µV C n High common mode rejection 120 dB n Low input noise current 0 15 pA Hz n Low input offset current 2 nA n High input voltage range 14V n Wide power supply range 3V to 22V n Offset null capability n Output sho...

Page 2: ...0 9 0 nV Hz fo 1 kHz 8 0 8 0 8 0 nV Hz Input Noise Current TA 25 C fo 10 Hz 1 0 1 0 1 0 pA Hz fo 100 Hz 0 3 0 3 0 3 pA Hz fo 1 kHz 0 15 0 15 0 15 pA Hz Input Resistance TA 25 C 1 5 1 5 1 5 MΩ Input Voltage Range TA 25 C 13 5 14 13 5 14 13 5 14 V Large Signal Voltage Gain TA 25 C RL 2 kΩ 1000 3000 1000 3000 250 3000 V mV VOUT 10V Common Mode TA 25 C 120 110 120 94 120 dB Rejection Ratio RS 10 kΩ Po...

Page 3: ...um Ratings indicate limits beyond which damage to the device may occur Operating Ratings indicate conditions for which the device is functional but do not guarantee specific performance limits Note 2 Derate at 150 C W for operation at ambient temperatures above 75 C Note 3 For supply voltages less than 22V the absolute maximum input voltage is equal to the supply voltage Note 4 These specification...

Page 4: ...t Voltage vs Temperature DS010474 17 Input Offset Current vs Temperature DS010474 18 Input Bias Current vs Temperature DS010474 19 Stabilization Time of Input Offset Voltage from Power Turn On DS010474 20 Change in Input Offset Voltage Due to Thermal Shock vs Time DS010474 21 Input Noise Voltage vs Frequency DS010474 22 Input Noise Current vs Frequency DS010474 23 www national com 4 ...

Page 5: ... Frequency Response for Values of Compensation Note 6 DS010474 25 Values for Suggested Compen sation Networks vs Various Close Loop Voltage Gains DS010474 26 Frequency Response for Various Close Loop Gain Note 6 DS010474 27 Output Voltage Swing vs Frequency Note 6 DS010474 28 Transient Response DS010474 29 Transient Response Test Circuit DS010474 8 www national com 5 ...

Page 6: ...ion Component Values AV R1 C1 R2 C2 Ω µF Ω µF 10 000 10k 50 pF 1 000 470 0 001 100 47 0 01 10 27 0 05 270 0 0015 1 10 0 05 39 0 02 Voltage Offset Null Circuit DS010474 3 Frequency Compensation Circuit DS010474 4 www national com 6 ...

Page 7: ...odiode Amplifier DS010474 9 DC Gains 10 000 1 000 100 and 10 Bandwidth Determined by value of C1 Thermocouple Amplifier DS010474 10 Note Indicates 1 metal film resistors recommended for temperature stability www national com 7 ...

Page 8: ...Typical Applications Continued 100V Common Mode Range Differential Amplifier DS010474 11 Instrumentation Amplifier with High Common Mode Rejection DS010474 12 www national com 8 ...

Page 9: ...Typical Applications Continued Precision Amplifier AVCL 1000 DS010474 13 www national com 9 ...

Page 10: ...Physical Dimensions inches millimeters unless otherwise noted Order Number LM725H 883 LM725CH or LM725AH 883 NS Package Number H08C Order Number LM725CN NS Package Number N08E www national com 10 ...

Page 11: ...bly expected to cause the failure of the life support device or system or to affect its safety or effectiveness National Semiconductor Corporation Americas Tel 1 800 272 9959 Fax 1 800 737 7018 Email support nsc com National Semiconductor Europe Fax 49 0 1 80 530 85 86 Email europe support nsc com Deutsch Tel 49 0 1 80 530 85 85 English Tel 49 0 1 80 532 78 32 Français Tel 49 0 1 80 532 93 58 Ital...

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