SGS Thomson Microelectronics LF347, LF347N, LF147, LF247 Datasheet
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
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LF147 - LF247 - LF347
SCHEMATI C DIAGRAM (e ach amplifie r)
V
CC
Non-inverting input
Inverting input
30k
100
100
Ω
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
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
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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
T
T
amb
min.
amb
min.
=25oC
≤ T
amb
=25oC
≤ T
amb
≤ T
≤ T
max.
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.
amb
min.
=25oC
≤ T
amb
=25oC
≤ T
amb
≤ T
≤ T
max.
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
pA
nA
V/mV
dB
mA
V
dB
mA
V
V/µs
µs
%
MHz
Ω
%
nV
√Hz
3/10
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