Datasheet LF347, LF347N, LF147, LF247 Datasheet (SGS Thomson Microelectronics)

LF147 - LF247

LF34 7

WIDE BANDWIDTH

QUAD J-FET OPERATIONAL AMPLIFIERS

.LOW POWERCONSUMPTION

.WIDE COMMON-MODE (UP TO V

DIFFERENTIALVOLTAGERANGE

CC

+

)AND

.LOW INPUTBIASANDOFFSETCURRENT

.OUTPUTSHORT-CIRCUIT PROTECTION

.HIGH INPUT IMPEDANCE J–FET INPUT

STAGE

.INTERNALFREQUENCY COMPENSATION

.LATCHUPFREE OPERATION

.HIGHSLEWRATE : 16V/µs(typ)

DESC RIP TI ON

Thesecircui t sarehighspeedJ–F ETinputquadoperationalamplif i ers inc orporati ngwellmatched,highvol tageJ–FETandbipolartrans i s torsin a monolithi cintegratedcircuit.

Thed evicesfeatu rehighslewr ates ,lowinputbiasand offsetcurrents ,andlow offsetvoltagetemperature coefficient .

(PlasticPackage)

(PlasticMicropackage)

ORDER CODES

Part Number

LF347 0 LF247 –40 LF147 -55 Example : LF347IN

N

DIP14

D

SO14

Temperature

Range

o

C, +70oC ••

o

C, +105oC ••

o

C, +125oC ••

Package

ND

PIN CONNECTI O NS (topview)

Output 1

Inverting Input 1

Non-inverting Input 1

Non-inverting Input 2

Inverting Input 2

Output 2

October1997

1 2

-

+

3

+

4

V

CC

5

+

-

6 7

14

Output 4

13

-

+

-

Inverting Input 4

12

Non-inverting Input 4 11 10

9 8

-

V

CC

Non-inverting Input 3

Inverting Input 3

Output 3

1/10

LF147 - LF247 - LF347

SCHEMATI C DIAGRAM (e ach amplifie r)

V

CC

Non-inverting input

Inverting input

30k

100

Ω

200

Ω

Output

8.2k

Ω

1.3k

V

CC

35k

1.3k

35k

100

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

P

T

Notes : 1. All voltage values, exceptdifferential voltage, are withrespect to thezero reference level (ground) of the supply voltages where 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 LF347

oper

LF247 LF147

Storage Temperature Range –65 to 150

stg

zeroreference level isthe midpointbetween V

2. Differentialvoltagesare atthe non-inverting inputterminal withrespect to theinvertinginput terminal.

3. The magnitude of theinput voltage must never exceed the magnitude of the supply voltageor 15 volts, whichever is less.

4. The outputmay be shortedto groundor to either supply. Temperature and /or supply voltages must be limited to ensure that the dissipation rating is not exceeded.

+

CC

andV

–

.

CC

0to70 –40 to 105 –55 to 125

o

C

o

C

2/10

LF147 - LF247 - LF347

ELECTRICAL CHARACTERISTICS

= ±15V, T

V

CC

Symbol Parameter Min. Typ. Max. Unit

V

io

DV

io

I

io

I

ib

A

vd

SVR Supply Voltage Rejection Ratio (R

I

CC

V

icm

CMR Common Mode Rejection Ratio (R

Ios Output Short-circuit Current

±V

OPP

SR Slew Rate

t

r

K

OV

GBP Gain Bandwidth Product

R

i

THD Total Harmonic Distortion (f = 1kHz, A

e

n

∅m Phase Margin 45 Degrees

V

O1/VO2

* The input bias currents are junction leakage currents which approximately double for every10oC increase in thejunction temperature.

=25oC (unless otherwise specified)

amb

Input Offset Voltage (RS= 10kΩ)

T T

amb min.

=25oC

≤ T

amb

≤ T

max.

310

13 Input Offset Voltage Drift 10 µV/oC Input Offset Current *

T T

amb min.

=25oC

≤ T

amb

≤ T

max.

5 100

4

Input Bias Current *

T T

amb min.

=25oC

≤ T

amb

≤ T

max.

20 200

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

T T

amb min.

=25oC

≤ T

amb

=25oC

≤ T

amb

≤ T

max.

= 10kΩ)

S

50 25

80 80

200

86

Supply Current, per Amp, no Load

T T

amb min.

=25oC

≤ T

amb

≤ T

max.

1.4 2.7

2.7

Input Common Mode Voltage Range ±11 +15

-12

= 10kΩ) T T

T T

amb min.

=25oC

≤ T

amb

=25oC

≤ T

amb

≤ T

max.

S

70

86

70

10 10

40 60

60

Output Voltage Swing

=25oCR

T

amb

≤ T

T

min.

= 10V, RL=2kΩ, CL= 100pF, T

(V

i

amb

≤ T

max.

=2kΩ

L

= 10kΩ

R

L

RL=2kΩ

= 10kΩ

R

L

=25oC, unity gain) 12 16

amb

10 12 10 12

12

13.5

Rise Time

= 20mV, RL=2kΩ,CL= 100pF, T

(V

i

=25oC, unity gain) 0.1

amb

Overshoot

= 20mV, RL=2kΩ,CL= 100pF, T

(V

i

(f = 100kHz,T

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

amb

Input Resistance 10

= 100pF, T

C

L

=25oC, VO=2VPP) 0.01

amb

Equivalent Input Noise Voltage (f = 1kHz, R

= 100Ω)

s

=25oC, unity gain) 10

amb

= 20dB, RL=2kΩ,

V

12

15

Channel Separation (Av= 100) 120 dB

mV

pA nA

V/mV

dB

mA

V

dB

mA

V

V/µs

µs

%

MHz

Ω

%

nV

√Hz

3/10

LF147 - LF247 - LF347

MAXIMUM PEAK-TO-P EAK OUTPUT

VOLTAGE VERSUS FREQUENCY

VOLTAGE(V)

MAXIMUM PEAK-TO-PEAKOUTPUT

30

25 20

15

10

5

0

100 1K 10K 100K 10M1M

=

15VV

CC

=

10VV

CC

=5VV

CC

FREQUENCY (Hz)

R

L

T

amb

SeeFigure2

MAXIMUM PEAK-TO-PEAK OUTPUT

VOLTAGE VERSUS FREQUENCY

30

T

VOLTAGE (V)

MAXIMUMPEAK-TO-PEAK OUTPUT

=+25 C

amb

25 20

15

T

10

amb

5

T

= +125 C

amb

0

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

FREQUENCY (Hz)

= 15V

V

CC

=2k

R

L

Se e Figure 2

=-55 C

=2kΩ

=+25°C

Ω

MAXIMUM PEAK-TO-PEAK OUTPUT

VOLTAGE VERSUS FREQUENCY

VOLTAGE (V)

MAXIMUMPEAK-TO-PEAK OUTPUT

30

25 20

V

CC

VCC=

15V

=

10V

15

10

VCC=

5 0

100 1K 10 K 100K 10M1M

FREQUENCY (Hz)

5V

= 10k

R

L

T

amb

See Figure 2

MAXIMUM PEAK-TO-PEAK OUTPUT

VOLTAGE VERSUS FREE AIR TEMP.

30

25

VOLTAGE (V)

MAXIMUM PEAK-TO-PEAKOUTPUT

20

15

10

V

5

0

=15V

CC

See Figure 2

-75 -25 25 75 125-50 0 50 -50 TEMPERATURE (°C)

R R

= 10kΩ

L

=2kΩ

L

Ω

=+25 C

MAXIMUM PEAK-TO-PEAK OUTPUT

VOLTAGE VERSUS LOAD RESISTANCE

30

=

15VV

CC

MAXIMUM PEAK-TO-PEAKOUTPUT

4/10

25 20

15 10

VOLTAGE (V)

5 0

0.1 0.2 0.4 0.7 1 2 4 7 10

= +25°CT

amb

See Figure 2

LOAD R ESISTANCE (k

Ω)

MAXIMUM PEAK-TO-PE AK OUTPUT

VOLTAGE V ERSUS SUPPLY VOLTAGE

30

=10kΩ

R

L

25

T

= +25°C

amb

20

15 10

VOLTAGE (V)

5

02468101214 16

MAXIMUM PEAK-TO-PEAKOUTPUT

SUPPLY VOLTAGE ( V)

LF147 - LF247 - L F347

INPUT BIAS CURRENT VE RS US

FREE AIR TEMPERATURE

100

INPUTBIAS CURRENT (nA)

V

10

1

0.1

0.01

-50 -25 0 25 50 75 100 125

15V

=

CC

TEMPERATURE(°C)

LARGE SIG NAL DIFFERE NTIAL

VOLTAGE AMPLIFI C ATI ON AND PHASE

SHIFT VERSUS FREQUENCY

100

10

1

AMPLIFICATION(V/V)

DIFFERENTIAL VOLTAGE

100

PHASE SHIFT

(right scale)

R=2kΩ

L

C =100pF

L

V=15V

CC amb

T=+125

C

1K 10K 100K 10M1M

FREQUENCY (Hz)

DIFFERENTIAL

VOLTAGE

AMPLIFICATION

(left s cale)

180

90

LARGE SI GNAL DIFFERE NT IAL

VOL TAGE AMPLI FICATION VERSUS

FREE AIR TEMPERAT URE

1000

400 200

100

40 20

V

= 15V

CC

10

V

= 10V

O

4

AMPLIFICATION(V/V)

DIFFERENTIAL VOLTAGE

RL=2kΩ

2 1

-75 -50 -25 0 25 50 75 TEMPERATURE(°C)

100

125

TOTAL POWER DISSIPATION VERSUS

FREE AIR T EM PERATURE

250 225 200 175 150 125 100

75

0

TOTAL POWERDISSIPATION (mW)

50 25

0

-75 -50 -25 0

25

TEMPERATURE (°C)

V

15V

=

CC

No signal No load

50 75 100 125

SUPPLY CURRENT PE R AMPLIFI ER

VERSUS FREE AIR TE MPE RATURE

2.0 V

CC

No signal No load

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 -50 -25 0

25

TEMPERATURE(°C)

COMMON MODE REJECTIO N RATIO

VERSUS FREE A IR TEMPERATURE

2.0 T

15V

=

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

SUPPLY CURRENT (mA)

0

02 46

+25 C

=

amb

No signal No loa d

10 12 14 16

8

SUPPLYVOLTAGE (V)

5/10

LF147 - LF247 - LF347

COMMON MODE REJECTION RATIO

VERSUS FREE AIR TEMPERATURE

89

R

=10kΩ

L

88

V

=15V

CC

87 86

85

RATIO (dB)

84

83

-50 -25 0 25 50 75 100 125

COMMON MODE MODEREJECTION

-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)

VCC= 15V

R

L

T

amb

0.5 0.6

0.4

=2k

= +25°C

Ω

0.7

VOLTAGE FOLLOWER LARGE SIGNAL

PULSE RESPONSE

6

4

OUTPUT

INPUT

2 0

(V)

-2

-4

-6

INPUT AND OUTPUT VOLTAGES

V

= 15V

CC

=2k

R

Ω

L

= 100pFC

L

T

=+25 C

amb

00.511.522.533.5 TIME (µs)

EQUIVALEN T INPUT NOISE VOLTAGE

VERSUS FREQUENCY

70

= 15V

V A

R T

CC

V S

amb

=10

= 100 Ω

= +25°C

VOLTAGE (nV/VHz)

EQUIVALENTINPUT NOISE

60 50

40

30

20

10

0

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

FREQUENCY(Hz)

6/10

TOTAL HARMONIC DISTORTION 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

=1

V

A

V

=6V

V

=6V

(rms)

O

O (rms)

= +25°C

T

= +25°C

T

amb

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

FREQUENCY (Hz)

PARAME TE R MEA SURE ME NT I NFO RM ATI ON

LF147 - LF247 - LF347

Figure 1 : Voltage F o llower

-

1/4

LF347

C

e

I

= 1 00pF R=2k

L

TYP ICAL APP LIC ATI ONS

AUDI O DISTRIBUTION AMPL IFIER

e

o

Ω

f = 10 0kHz

O

Figure 2 : Gain -o f-10 I n ve r t ing Amplif ier

Ω

10k

Ω

1k

e

I

1/4

LF347

e

o

R

L

C

= 100 pF

L

Input

1µF

100k

100µF

Ω

1M

Ω

-

1/4

LF347

100k

Ω

V

CC

-

1/4

LF347

Output A

-

1/4

LF347

Output B

+

-

1/4

LF347

Output C

7/10

LF147 - LF247 - LF347

TYP ICAL APP LIC ATI ONS (continued)

POSITIVE FEEDBACK BAN DPASS FILTER

Ω

16k

220pF

Ω

43k

Ω

Input

43k

1.5k

-

220pF

Ω

1/4

LF347 LF347

43k

Ω

30k

-

1/4

LF347

Ω

16k

220pF

Ω

43k

Ω

-

30k

1/4

LF347

Output B

43k

1.5k

Ω

220pF

-

1/4

43k

Ω

OUTPUT A

OutputA

Ground

OUTPUT B

SECOND ORDER BANDPASS FILTER

fo = 100kHz ; Q = 30 ; Gain = 16

8/10

CASCAD E D BAND P AS S FILTER

fo=100kHz;Q=69;Gain=16

PACKAG E MECHANICAL DATA

14 PINS - PLASTIC DIP

LF147 - LF247 - LF347

Dimensions

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

Millimeters Inches

a1 0.51 0.020

B 1.39 1.65 0.055 0.065

b 0.5 0.020

b1 0.25 0.010

D 20 0.787 E 8.5 0.335

e 2.54 0.100

e3 15.24 0.600

F 7.1 0.280

i 5.1 0.201 L 3.3 0.130 Z 1.27 2.54 0.050 0.100

PM-DIP14.EPS

DIP14.TBL

9/10

LF147 - LF247 - LF347

PACKAG E MECHANICAL DATA

14 P INS - PL ASTIC MICROPACKAGE (SO)

Dimensions

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

Millimeters Inches

A 1.75 0.069 a1 0.1 0.2 0.004 0.008 a2 1.6 0.063

b 0.35 0.46 0.014 0.018

b1 0.19 0.25 0.007 0.010

C 0.5 0.020 c1 45

o

(typ.) D 8.55 8.75 0.336 0.334 E 5.8 6.2 0.228 0.244

e 1.27 0.050

e3 7.62 0.300

F 3.8 4.0 0.150 0.157

G 4.6 5.3 0.181 0.208

L 0.5 1.27 0.020 0.050 M 0.68 0.027 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 publicationare 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-SO14.EPS

SO14.TBL

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10/10

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