AC Electrical Characteristics
Symbol
Parameter
Amplifier to Amplifier Coupling
(Note 7)
Conditions
Min
LF147
Typ
−120
Max
Min
LF347B
Typ
−120
Max
Min
LF347
Typ
−120
Max
dB
Units
T
A
= 25˚C,
f = 1 Hz−20 kHz
(Input Referred)
SR
GBW
e
n
Slew Rate
Gain-Bandwidth Product
Equivalent Input Noise Voltage
V
S
=
±
15V, T
A
= 25˚C
V
S
=
±
15V, T
A
= 25˚C
T
A
= 25˚C, R
S
= 100Ω,
f = 1000 Hz
8
2.2
13
4
20
8
2.2
13
4
20
8
2.2
13
4
20
V/µs
MHz
i
n
Equivalent Input Noise Current
T
j
= 25˚C, f = 1000 Hz
0.01
0.01
0.01
Note 2:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-
tional, but do not guarantee specific performance limits.
Note 3:
Unless otherwise specified the absolute maximum negative input voltage is equal to the negative power supply voltage.
Note 4:
Any of the amplifier outputs can be shorted to ground indefinitely, however, more than one should not be simultaneously shorted as the maximum junction
temperature will be exceeded.
Note 5:
For operating at elevated temperature, these devices must be derated based on a thermal resistance of
θ
jA
.
Note 6:
The LF147 is available in the military temperature range −55˚C≤T
A
≤125˚C,
while the LF347B and the LF347 are available in the commercial temperature
range 0˚C≤T
A
≤70˚C.
Junction temperature can rise to T
j
max = 150˚C.
Note 7:
Unless otherwise specified the specifications apply over the full temperature range and for V
S
=
±
20V for the LF147 and for V
S
=
±
15V for the LF347B/LF347.
V
OS
, I
B
, and I
OS
are measured at V
CM
= 0.
Note 8:
The input bias currents are junction leakage currents which approximately double for every 10˚C increase in the junction temperature, T
j
. Due to limited pro-
duction test time, the input bias currents measured are correlated to junction temperature. In normal operation the junction temperature rises above the ambient tem-
perature as a result of internal power dissipation, P
D
. T
j
= T
A
+θ
jA
P
D
where
θ
jA
is the thermal resistance from junction to ambient. Use of a heat sink is recommended
if input bias current is to be kept to a minimum.
Note 9:
Supply voltage rejection ratio is measured for both supply magnitudes increasing or decreasing simultaneously in accordance with common practice from
V
S
=
±
5V to
±
15V for the LF347 and LF347B and from V
S
=
±
20V to
±
5V for the LF147.
Note 10:
Refer to RETS147X for LF147D and LF147J military specifications.
Note 11:
Max. Power Dissipation is defined by the package characteristics. Operating the part near the Max. Power Dissipation may cause the part to operate out-
side guaranteed limits.
Note 12:
Human body model, 1.5 kΩ in series with 100 pF.
3
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