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■LOW POWER CONS UMPTI ON
■WIDE COMMON-MODE (UP TO VCC+) AND
DI FF ER ENTIAL VOLTAGE RANGE
■LOW INPUT BIAS AND OFFSET CURRENT
■OUTPUT SHORT-CIRCUIT PROTECTION
■HIGH INPUT IMPEDANCE J–FET INPUT
STAGE
■INTERNAL FREQUENCY COMPENSATION
■LATCH UP FREE OPERATION
■HIGH SLEW RATE : 16V/µs (typ)
DESCRIPTION
These circuits are high speed J–FET input quad
operational amp lifiers incorporating well matched,
high voltage J–FET and bipolar transistors in a
monolithic integrated cir cuit.
The devices feature high slew rates, low input bias
and offset currents, and low offset voltage tem-
perature coefficient.
ORDER CODE
N = Dual in Line Package (DIP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top v iew)
Part Number Temperature Range Package
ND
LF147 -55°C, +125°C ••
LF247 -40°C, +105°C ••
LF347 0°C, +70°C ••
Example : LF347IN
N
DIP14
(Plastic Package)
D
SO14
(Plastic Micropackage)
Inverting Input 2
Non-inverting Input 2
Non-inverting Input 1
CC
V -
CC
V
1
2
3
4
8
5
6
7
9
10
11
12
13
14
+
Output 3
Output 4
Non-inverting Input 4
Inverting Input 4
Non-inverting Input 3
Inverting Input 3
-
+
-
+
-
+
-
+
Output 1
Inverting Input 1
Output 2
LF147 - LF247
LF347
W IDE B ANDWI DTH
QUAD J-FET OPERA TIONAL AMPLIFIERS
March 2001
LF147 - LF 247 - LF347
2/10
SCHEMATIC DIAGRAM (each am plifier)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter LF147 LF247 LF347 Unit
VCC Supply voltage - note 1)
1. All voltage values, except differential voltage, are with respect to the zero reference level (ground) of the supply voltages where the zero reference
level is the midpoint between VCC+ and VCC-.
±18 V
ViInput Voltage - note 2)
2. The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 volts, whichever is less.
±15 V
Vid Differential Input Voltage - note 3)
3. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
±30 V
Ptot Power Dissipation 680 mW
Output Short-circuit Duration - note 4)
4. The output may be shorted to ground or to either supply. Temperature and/or supply voltages must be limited to ensure that th e dissipation rating
is not exceeded
Infinite
Toper Operating Free-air Temperature Range -55 to +125 -40 to +105 0 to +70 °C
Tstg Storage Temperature Range -65 to +150 °C
Output
Non-inverting input
Inverting input
V
CC
V
CC
200
W
W
100
W
100
1.3k
30k
35k 35k
W
100
1.3k
8.2k
LF147 - LF247 - LF347
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ELECTRICAL CHARACTERISTICS
VCC = ±15V, Tamb = +25°C (unless otherwise specified )
Symbol Parameter Min. Typ. Max. Unit
Vio
Input Offset Voltage (Rs = 10kΩ)
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
310
13
mV
DVio Input Offset Voltage Drift 10 µV/°C
Iio Input Offset Current - note 1)
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
1. The input bias currents are junction leakage currents which approximately double for every 10°C increase in the junction temperature.
5100
4pA
nA
Iib
Input Bias Current - note 1
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax 20 200
20 pA
nA
Avd
Large Signal Voltage Gain (RL = 2kΩ, Vo = ±10V) ,
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
50
25 200 V/mV
SVR Supply Voltage Rejection Ratio (RS = 10kΩ)
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
80
80 86 dB
ICC
Supply Current, Per Amp, no Load
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax 1.4 2.7
2.7
mA
Vicm Input Common Mode Voltage Range ±11 +15
-12 V
CMR Common Mode Rejection Ratio (RS = 10kΩ)
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
70
70 86 dB
IOS
Output Short-Circuit Current
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax 10
10 40 60
60
mA
±Vopp
Output Voltage Swing
Tamb = 25°C RL = 2kΩ
RL = 10kΩ
Tmin ≤ Tamb ≤ Tmax RL = 2kΩ
RL = 10kΩ
10
12
10
12
12
13.5
V
SR Slew Rate
Vi = 10V, RL = 2kΩ, CL = 100pF, Tamb = 25°C, unity gain 12 16 V/µs
trRise Time
Vi = 20mV, RL = 2kΩ,CL = 100pF, Tamb = 25°C, unity gain 0.1 µs
Kov Overshoot
Vi = 20mV, RL = 2kΩ, CL = 100pF, Tamb = 25°C, unity gain 10 %
GBP Gain Bandwidth Product
f =100kHz, Tamb = 25°C, Vin = 10mV, RL =2kΩ, CL = 100pF 2.5 4 MHz
RiInput Resis tance 1012 Ω
THD Total Harmonic Distortion
f =1kHz, Av = 20dB, RL = 2kΩ, CL = 100pF
Tamb = 25°C, VO = 2Vpp 0.01
%
enEquiv alent Input Noise Volta ge (RS = 100Ω, f = 1KHz) 15
∅m Phase Margin 45 Degrees
Vo1/Vo2 Channel Separation ( Av = 100) 120 dB
nV
Hz
------------
LF147 - LF 247 - LF347
4/10
MAXI MUM PEAK-TO-PEAK OUTPUT
VOLTAGE versus FREQUENCY
MAXI MUM PEAK-TO-PEAK OUTPUT
VOLTAGE versus FREQUENCY
MAXI MUM PEAK-TO-PEAK OUTPUT
VOLTAGE versus LOAD RESISTANCE
MAXI MUM PEAK-TO-PEAK OUTPUT
VOLTAGE versus FREQUENCY
MAXI MUM PEAK-TO-PEAK OUTPUT
VOLTAGE versus FREE AIR TEMP.
MAXI MUM PEAK-TO-PEAK OUTPUT
VOLTAGE v ers us SU PPLY VOLTAGE
30
25
20
15
10
5
02
4
6810
12 14 16
MAXIMUM PEAK-TO-PEAK OUTPUT
VOLTAGE (V)
R
L
= 10 k
Ω
T
amb
= +25˚C
SUPPLY VOLTAGE ( V)
LF147 - LF247 - LF347
5/10
INPUT BIAS CURRENT versus FREE AIR
TEMPERATURE
LARGE SIGNAL DIFFERENTIAL VOLTAGE
AMPLIFICATION AND PHASE SHIFT versus
FREQUENCY
SUPPLY CURRENT PER AMPLIFIER versus
FREE AIR TEMPERATURE
LARGE SIGNAL DIFFERENTIAL VOLTAGE
AMPLIFICATION AND PHASE SHIFT versus
FREQUENCY
TOT AL POWER DISSIP A TION versus FREE AIR
TEMPERA TURE
COM MON MODE REJECTION RATIO versus
FREE AIR TEMPERATURE
100
10
1
0.1
0.01
IN PUT BIAS CURR ENT (n A)
-50 -25 0 25 50 75 100 125
TEMPERATURE (˚C)
V
CC
=15V
FREQUENCY (Hz)
DIFFERENTIAL VOLTAGE
AMPLIFICATION (V/V)
100
10
100 1K 10K 100K 10M1M
1
DIFFERENTIAL
VOLTAGE
AMPLIFICATION
(left scale)
180
9
0
0
R = 2k
W
C = 100pF
V = 15V
T = +125°C
L
L
CC
amb
PHASE SHIFT
(right scale)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
SUPP LY CURRENT (mA)
-75 -50 -25 0 25 50 75 100 125
TEMPERATURE (˚C)
V
CC
= 15V
No signal
No load
1000
400
200
100
20
40
10
4
2
1
DIFFERENTIAL VOLTAGE
AMPLIFICATION (V/V)
-75 -50 -25 0 25 50 75 100 125
TEMPERATURE (˚C)
R
L
= 2k
Ω
V
O
= 10V
V
CC
= 15V
250
225
200
175
150
125
100
75
50
25
0
TOTAL POWER DISSIPATION (mW)
-75 -50 -25 0 25 50 75 100 125
TEMPERATURE (˚C)
V
CC
= 15V
No signal
No load
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
SUPPLY CURRENT (mA)
02 4 6 8
10 12 14 16
SUPPLY VOLTAGE (V)
T
amb
=
+25°C
No signal
No load
LF147 - LF 247 - LF347
6/10
COM MON MODE REJECTION RATIO versus
FREE AIR TEMPERATURE
OUTPUT VOLTAGE versus ELAPSED TIME
VOL T AGE FOLLOWER LARGE SIGNAL PULSE
RESPON SE
EQUIVALENT INPUT NOISE VOLTAGE versus
FREQUENCY
TOTAL HARMONIC DISTORTION versus FREQUENCY
89
88
87
86
85
84
-50 -25 0 25 50 75 100 125
COMMON MODE MODE REJECTION
RATIO (dB)
TEMPERATURE (˚C)
83-75
R
L
= 1 0 k
Ω
= 15V
V
CC
t
r
28
24
20
16
12
8
4
0
-4
O UTPUT VOLTAGE (mV)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
TIME (
µ
s)
10%
90%
OVERSHOOT
R
L
= 2k
Ω
T
amb
= +25˚C
V
CC
= 15V
6
4
2
0
-2
-4
0 0.5 1 1.5 2 2.5 3 3.5
INPUT AND OUTPUT VOLTAGES
(V)
TIME (
m
s)
-6
= 15V
V
CC
R
L
= 2 k
W
= 100pF
C
L
T
amb
= +25°C
OUTPUT
INPUT
70
60
50
40
30
20
10
0
EQUIVALENT INPUT NOISE
VOLTAGE (nV/VHz)
10 40 100 400 1k 4k 10k 40k 100k
FREQUENCY (Hz)
A
V
= 10
R
S
= 100
Ω
T
amb
= +25˚C
V
CC
= 15V
1
0.4
0.1
0.04
0.01
0.004
0.001
TOTAL HARMONIC DISTORTION
(%)
100 400 1k 4k 10k 40k 100k
FREQUENCY (Hz)
A
V
= 1
T
amb
= +25˚C
V
CC
= 15V
= 6V
V
O(rms)
A
V
= 1
T
amb
= +25˚C
= 6V
V
O(rms)
V
CC
= 15V
LF147 - LF247 - LF347
7/10
PARAMETER MEASUREMENT INFORMATION
Fi gure 1 : Voltage Follower Fi gure 2 : Ga in- of-10 Inve r t ing A m p lif ier
TYPICAL APPLICATIONS
AUDIO DISTRIBUTOR AMPLIFIER
-
e
I
LF347
R
L
1/4
C
L
= 100pF
1k
W
10k
W
e
o
-
1/4
-
-
-
1/4
1/4
LF347
1/4
1M
W
1
m
F
Output A
Output B
Output
C
Input
100k
W
100k
W
100k
W
100k
W
100
m
F
VCC
+
f = 100kHz
O
LF347
LF347
LF347
LF147 - LF 247 - LF347
8/10
TYPICAL APPLICATIONS (continued)
POSIT IVE FEEDBACK BAN DPASS FILTER
OUTP U T A OUTP U T B
-
-
1/4
220pF
43k
W
Input
1.5k
W
43k
W
220pF
43k
W
16k
W
1/4
30k
W
Output A
-
1/4
1.5k
W
220pF
43k
W
220pF
43k
W
-
1/4
43k
W
16k
W
30k
W
Output B
Ground
LF347
LF347 LF347
LF347
SECOND ORDER BANDPASS FILTER
fo = 100kHz; Q = 30; Gain = 16 CASCADED BANDPASS FILTER
fo = 100kHz; Q = 69; Gain = 16
LF147 - LF247 - LF347
9/10
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC DIP
Dim. Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
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
LF147 - LF247 - LF347
Information furnished is be lieved to be accur ate and reliable. However, STMicroelectronics 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 i m pl i cation or otherwi se u nder a ny patent or patent rights of STM i croel ectronics. Spec i fica tions m ention ed in this publi cation a re s ubject
to change without notice. This publication supersedes and replaces all information previously suppl ied. STMicroelectronics produ c ts are not
authoriz ed for use as crit i cal co m ponent s in lif e supp ort devices or sy stem s without express written a pproval of STM icroelectronics.
© The ST logo is a regi stered trademark of ST M i croele ct ronic s
© 2001 STM i croe l ectronics - Printed i n Ital y - A l l Rights Reser ved
STMicroe le ctronic s GR OUP OF COMPANIES
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© http ://www.st.c om
10/10
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC MICROPACKAGE (SO)
Dim. Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
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° (typ.)
D (1) 8.55 8.75 0.336 0.344
E 5.8 6.2 0.228 0.244
e 1.27 0.050
e3 7.62 0.300
F (1) 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
S 8° (max.)
Note : (1) D and F do not include mold flash or protrusions - Mold flash or protrusions shall not exceed 0.15mm (.066 inc) ONLY FOR DATA B OOK.
DM
F
14
17
8
be3 eE
LG
C
c1
A
a2
a1
b1
s
