Datasheet LF351N, LF351D, LF351, LF151, LF251 Datasheet (SGS Thomson Microelectronics)

SINGLE J-FET OPERATIONAL AMPLIFIER

.INTERNALLY ADJUSTABLE INPUT OFFSET

VOLTAGE

.LOW POWER CONSUMPTION

.WIDE COMMON-MODE (UP TO V

DIFFERENTIALVOLTAGERANGE

CC

+

)AND

.LOW INPUT BIAS AND OFFSET CURRENT

.OUTPUTSHORT-CIRCUIT PROTECTION

.HIGH INPUT IMPEDANCE J–FET INPUT

STAGE

.INTERNAL FREQUENCY COMPENSATION

.LATCHUPFREE OPERATION

.HIGHSLEWRATE: 16V/µs (typ)

DESC RIP TI ON

Thesecircui t sare highspeedJ–FETinputsingle operationalampl if iersinc or poratingw el lmatched,high voltage J–FET and bipolar transistors in a monolithic integratedcircui t.

Thedevicesfeaturehighslewrates,lowinputbiasand offsetcurr ents, and lowoffsetvoltagetemperatur e coefficient .

LF251 - LF351

WIDE BANDWIDTH

N

DIP8

(PlasticPackage)

ORDER CODES

Part Number Temperature

o

LF351 0 LF251 –40 LF151 –55

C, +70oC ••

o

C, +105oC ••

o

C, +125oC ••

LF15 1

D

SO8

(PlasticMicropackage)

Package

ND

PIN CONNECTI O NS (top view)

1 2 3 4

October1997

8 7 6

1 - Offset Null 1 2 - Inverting input 3 - Non-inverting input

-

4-V

CC

5 - Offset Null 2 6 - Output

+

7-V

CC

8 - N.C.

5

1/9

LF151 - LF251 - LF351

SCHE MATIC DI AGRAM

Non-inverting

Inve rting

V

CC

input

1.3k

V

CC

Offse t Null1 Offset Null2

Ω

100

30k

Ω

1.3k

35k

100

35k

Ω

200

Ω

8.2k

Output

INPUT OFFS ET VOLTAG E NULL CIRCUITS

LF35 1

N1

N2

Ω

100k

V

CC

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

P

T

Notes: 1. All voltagevalues, except differential voltage, are with respect to the zero reference level (ground)of the supplyvoltageswhere the

Supply Voltage - (note 1) ±18 V

CC

Input Voltage - (note 3) ±15 V

V

i

Differential Input Voltage - (note 2) ±30 V

V

id

Power Dissipation 680 mW

tot

Output Short-circuit Duration - (note 4) Infinite Operating Free Air Temperature Range LF351

oper

LF251 LF151

Storage Temperature Range –65 to 150

stg

zero reference levelis the midpoint between V

2. Differentialvoltages are at the non-inverting input terminalwith respect to the inverting input terminal.

3. The magnitude of the inputvoltage must never exceed themagnitude of the supply voltage or 15 volts, whichever is less.

4. The output may be shorted to ground or to either supply. Temperature and /or supply voltages must be limitedto ensure that the dissipationrating is not exceeded.

+

CC

andV

–

.

CC

0to70 –40 to 105 –55 to 125

o

C

o

C

2/9

LF151 - LF251 - LF351

ELECTRICAL CHARACTERISTICS

= ±15V, T

V

CC

Symbol Parameter

V

DV

A

Input Offset Voltage (RS= 10kΩ)

io

Input Offset Voltage Drift 10 µV/oC

io

Input Offset Current *

I

io

Input Bias Current *

I

ib

Large Signal Voltage Gain (RL=2kΩ,VO=±10V)

vd

SVR Supply Voltage Rejection Ratio (R

I

V

Supply Current (no load)

CC

Input Common Mode Voltage Range ±11 +15

icm

CMR Common Mode Rejection Ratio (R

Ios Output Short-circuit Current

±V

Output Voltage Swing

OPP

SR Slew Rate

(V

t

Rise Time

r

(V

K

OV

Overshoot (V

GBP Gain Bandwidth Product

(f = 100kHz, T

R

Input Resistance 10

i

THD Total Harmonic Distortion (f = 1kHz, A

C

L

e

Equivalent Input Noise Voltage (f = 1kHz, Rs= 100Ω)15

n

∅m Phase Margin 45 Degrees

* The inputbias currents arejunction leakage currents which approximately double forevery 10oC increase in thejunctiontemperature.

=25oC (unless otherwise specified)

amb

=25oC

T

amb

≤ T

T

min.

T

amb

T

min.

T

amb

T

min.

T

amb

T

min.

T

amb

T

min.

T

amb

T

min.

T

amb

T

min.

T

amb

T

min.

T

amb

T

min.

= 10V, RL=2kΩ, CL= 100pF, T

i

= 20mV, RL=2kΩ,CL= 100pF, T

i

= 20mV, RL=2kΩ,CL= 100pF, T

i

= 100pF, T

≤ T

amb

max.

=25oC

≤ T

amb

max.

=25oC

≤ T

amb

max.

=25oC

≤ T

amb

max.

= 10kΩ)

=25oC

≤ T

amb

≤ T

max.

S

=25oC

≤ T

amb

max.

= 10kΩ)

=25oC

≤ T

amb

≤ T

max.

S

=25oC

≤ T

amb

max.

=25oCR

≤ T

amb

max.

=25oC, Vin= 10mV, RL=2kΩ,CL= 100pF) 2.5 4

amb

=25oC, VO=2VPP) 0.01

amb

=2kΩ

L

= 10kΩ

R

L

RL=2kΩ

= 10kΩ

R

L

=25oC, unity gain) 12 16

amb

=25oC, unity gain) 0.1

amb

= 20dB, RL=2kΩ,

V

LF151 - LF251 - LF351

Min. Typ. Max.

20 200

50

200

25

80

86

80

1.4 3.4

-12

70

86

70

10

40 60

10

10 12

12

13.5 10 12

=25oC, unity gain) 10

310

13

5 100

4

20

3.4

60

12

Unit

mV

pA nA

V/mV

dB

mA

V

dB

mA

V

V/µs

µs

%

MHz

Ω

%

nV

√Hz

3/9

LF151 - LF251 - LF351

MAXIMUM PEAK-TO- PEAK OUTPUT

VOLTAGE VERSUS FREQUENCY

VOLTAGE (V)

MAXIMUMPEAK-TO-PEAK OUTPUT

30

25 20

15

10

5 0

100

=

15VV

CC

= 10VV

CC

=

5VV

CC

1K 10K 100K 10M1M

FREQUENCY (Hz)

R

Ω

=2k

L

T

=+25 C

amb

See Figure 2

MAXIMUM PEAK-TO- PEAK OUTPUT

VOLTAGE VERSUS FREQUENCY

30

T

VOLTAGE (V)

MAXIMUM PEAK-TO-PEAK OUTPUT

=+25 C

amb

25 20

15

T

10

5

T

=+125 C

am b

0

10k 40k 100k 400k 1M 4M 10M

FREQUENCY (Hz)

V

CC

R

L

Se e Figure 2

=-55 C

am b

= 15V

=2k

Ω

MAXIMUM PEAK-TO-PEAK OUTPUT

VOLTAGE VERSUS FREQUENCY

VOLTAGE (V)

MAXIMUMPEAK-TO-PEAK OUTPUT

30

25 20

VCC=

V

CC

15V

10V

=

15

10

5V

=

V

CC

5 0

100 1K 10K 100K 10M1M

FREQUENCY (Hz)

Ω

=10k

R

L

T

=+25 C

amb

See Figure 2

MAXIMUM PEAK-TO-PEAK OUTPUT

VOLTAGE VERSUS FREE AIR TEMP.

30

25

VOLTAGE (V)

MAXIMUM PEAK-TO-PEAK OUTPUT

20

15

10

V

= 15V

5

CC

See Figu re 2

0

-75 -2 5 25 75 125-50 0 50 -50

TEMP ER ATURE( C)

R

Ω

=10k

L

R

Ω

=2k

L

MAXIMUM PEAK-TO- PEAK OUTPUT

VOLTAGE VERSUS LOAD RESISTANCE

30

= 15V

V

CC

25

T

=+25 C

amb

See Figure 2

20

15 10

5

VOLTAGE (V)

0

0.1 0.2 0.4 0.7 1 2 4 7 10

MAXIMUMPEAK-TO-PEAK OUTPUT

4/9

LOAD RESISTANCE (kΩ)

MAXIMUM PEAK-TO-PEAK OUTPUT

VOLTAGE VERSUS SUPPLY VOLTAGE

30

VOLTAGE (V)

MAXIMUM PEAK-TO-PEAK OUTPUT

R

25

T

20 15

10

5

0246810121416

Ω

=10 k

L

=+25 C

amb

SUPPLYVOLTAGE (V)

LF151 - LF251 - L F351

INPUT BIAS CURRENT V E RSUS

FREE AIR TEMPERATURE

100

15V

V

=

CC

10

1

0.1

INPUT BIAS CURRENT (nA)

0.01

-50 -25 0 25 50 75 100 125 TEMPERATURE

(

C)

LARGE SIG NAL DI FFERENTIAL

VOLTAGE AMPLI FICATION AND PHASE

SHIFT VERSUS FREQUENCY

100

10

1

AMPLIFICATION (V/V)

DIFFERENTIAL VOLTAGE

100

P HASE S HIFT

(right sc a le)

R=2k C = 10 0pF V=15V T=+125

Ω

L L CC amb

1K 10K 100K 10M1M

C

FR EQ UENC Y (Hz )

DIFFE RE NTIAL

VOLTAGE

AMPLIFICATION

(left s c a le )

180

90

0

LARGE SI GNAL DI FFERENTIAL

VOL TAGE AMPLIFI CATION V ERSUS

FREE AIR TEMPERAT URE

1000

400 200

100

40 20

V

= 15V

CC

V

= 10V

O

R

Ω

=2k

L

-75 -50 -25 0 25 50 75 TEMPE RATURE ( C )

100

125

AMPLIFICATION (V/V)

DIFFERENTIAL VOLTAGE

10

4 2

1

TOTAL POWER DISSIPATION VERSUS

FREE AIR TEMPERATURE

250

V

225 200 175 150 100

75 50 25

0

TOTAL POWER DISSIPATION (mV)

-75 -50 -2 5 0

+/-15 V

CC

No s igna l No loa d

50 75 100 125

25

TEMPE RATURE ( C )

SUPPLY CURRENT PER AMPLIFIER

VERSUS FREE AIR TEMPERATURE

2.0 V

15V

=

CC

No s igna l No loa d

50 75 100 125

SUPPLY CURRENT (mA)

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2 0

-75 -5 0 -25 0 TEMPE RATURE ( C)

25

SUPPLY CURRENT P ER AMPLI FIER

VERSUS SUPPLY VOLTAGE

2.0 T

= + 25 C

amb

No s igna l No loa d

02 46 810121416

SUP PLY VOLTAGE (V)

SUPPLY CURRENT (mA)

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

5/9

LF151 - LF251 - LF351

COMMON MODE RE J ECTI ON RATI O

VERSUS FREE AIR TE MPE RATURE

89

R

88

V

=10k

L

= 15V

CC

Ω

87 86

85

RATIO (dB)

84

83

-50-250 2550 75100125

COMMON MODE MODE REJECTION

-75 TEMPERATURE( C)

OUTPUT VOLTAGE VERSUS

ELAPSED TIME

28 24

OVERSHOOT

OUTPUT VOLTAGE (mV)

20 16 12

8 4

10%

0

-4

90%

t

r

0 0.1 0.2

0.3

TIME (µs)

0.4

V

R

T

CC

L

amb

=2k

0.5

=15V

Ω

= +25 C

0.6

0.7

VOLTAGE FOLLOWER LARGE SIG NAL

PULSE RESPONSE

6

4

OUTPUT

INPUT

2 0

(V)

-2

-4

-6

INPUT AND OUTPUT VOLTAGES

V

= 15V

CC

Ω

=2k

R

L

C

= 100pF

L

T

=+25 C

amb

0 0.5 1 1.5 2 2.5 3 3.5

TIME (µs)

EQUIVALENT INPUT NOISE VOLTAGE

VERSUS FREQUENCY

VOLTAGE (nV/VHz)

EQUIVALENT INPUT NOISE

70 60 50

40 30 20

10

0

10 40 100 400 1k 4k 10k 40k 100k

FR EQUE NC Y (Hz)

V

CC

A R T

amb

= 15V

=10

V

= 100

S

Ω

=+25 C

6/9

TOTAL HARMONIC DISTORTI ON VERSUS

FREQUENCY

1

VCC= 15V

V

=15V

0.4

0.1

0.04

(%)

0.01

0.004

0.001

TOTAL HARMONIC DISTORTION

CC

=1

A

V

A

V

=6V

V

=6V

(rms)

O

=+25 C

T

=+25 C

amb

100 400 1k 4k 10k 40k 10 0k

FR EQ UE NCY (Hz )

PARAME TE R MEA SUREMENT I NFOR M ATI ON

LF151 - LF251 - LF351

Figure 1 : Voltag e Followe r

-

LF351

C

e

I

= 1 00pF

L

R=2k

L

TYP ICAL APP LICATIO N

(0.5Hz) SQUARE WAVE OSCI LLATOR

Ω

3.3k

Figure 2 : Gain -o f-10 Inve r t in g A mp lif ier

Ω

10k

Ω

1k

e

R

= 100k

F

+15V

I

Ω

e

o

Ω

-

LF351

e

o

Ρ

L

C

= 100 pF

L

HIGH Q NOTCH FILTER

C=3.3

F

R1 R2

C3

R3

C2C1

µ

f=

osc

LF351

F

2xR

-15V

Ω

3.3k

1

C

F

-

LF351

f=

o

C1 = C2 =

C3

2

= 1 00p F

R1=R2=2R3=1.5M

1k

9.1k

Ω

2xR

1

Ω

C

= 1kHz

1

7/9

LF151 - LF251 - LF351

PACKAG E MECHANICAL DATA

8 PIN S - P LASTIC DI P

Dimensions

Min. Typ. Max. Min. Typ. Max.

Millimeters Inches

A 3.32 0.131

a1 0.51 0.020

B 1.15 1.65 0.045 0.065 b 0.356 0.55 0.014 0.022

b1 0.204 0.304 0.008 0.012

D 10.92 0.430 E 7.95 9.75 0.313 0.384

e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300

F 6.6 0260

i 5.08 0.200 L 3.18 3.81 0.125 0.150 Z 1.52 0.060

PM-DIP8.EPS

DIP8.TBL

8/9

PACKAG E MECHANICAL DATA

8 PIN S - PLASTIC MICROPACKAGE (SO)

LF151 - LF251 - LF351

Dimensions

Min. Typ. Max. Min. Typ. Max.

Millimeters Inches

A 1.75 0.069

a1 0.1 0.25 0.004 0.010 a2 1.65 0.065 a3 0.65 0.85 0.026 0.033

b 0.35 0.48 0.014 0.019

b1 0.19 0.25 0.007 0.010

C 0.25 0.5 0.010 0.020

c1 45

o

(typ.) D 4.8 5.0 0.189 0.197 E 5.8 6.2 0.228 0.244 e 1.27 0.050

e3 3.81 0.150

F 3.8 4.0 0.150 0.157 L 0.4 1.27 0.016 0.050

M 0.6 0.024

S8

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics.

o

(max.)

PM-SO8.EPS

SO8.TBL

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ORDER CODE :

9/9