Datasheet
LF347, LF347B
JFET-INPUT
QUAD OPERATIONAL AMPLIFIERS
SLOS013B – MARCH 1987 – REVISED AUGUST 1994
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
DISSIPATION RATING TABLE
PACKAGE
T
A
≤ 25°C
POWER RATING
DERATING
FACTOR
DERATE
ABOVE T
A
T
A
= 70°C
POWER RATING
D
N
608 mW
680 mW
7.6 mW/°C
N/A
61°C
N/A
608 mW
680 mW
recommended operating conditions
MIN MAX
UNIT
Supply voltage, V
CC +
3.5 18 V
Supply voltage, V
CC –
–3.5 –18 V
electrical characteristics over operating free-air temperature range, V
CC±
= ±15 V (unless
otherwise specified)
PARAMETER
TEST
T
†
LF347 LF347B
UNIT
PARAMETER
CONDITIONS
T
A
†
MIN TYP MAX MIN TYP MAX
UNIT
V
IO
In
p
ut offset voltage
V
IC
= 0,
25°C 5 10 3 5
mV
V
IO
Inp
u
t
offset
v
oltage
IC
,
R
S
= 10 kΩ
Full range 13 7
mV
α
VIO
Average temperature coefficient of
input offset voltage
V
IC
= 0,
R
S
= 10 kΩ
18 18 µV/°C
I
IO
Inp t offset c rrent
‡
V
IC
=0
25°C 25 100 25 100 pA
I
IO
I
nput o
ff
set current
‡
V
IC
=
0
70°C 4 4 nA
I
IB
Inp t bias c rrent
‡
V
IC
=0
25°C 50 200 50 200 pA
I
IB
I
nput
bi
as current
‡
V
IC
=
0
70°C 8 8 nA
V
ICR
Common-mode input voltage range ±11
–12
to
15
±11
–12
to
15
V
V
OM
Maximum peak output voltage swing R
L
= 10 kΩ ±12 ±13.5 ±12 ±13.5 V
A
VD
Large signal differential voltage
V
O
= ±10 V,
25°C 25 100 50 100
V/mV
A
VD
Large
-
signal
differential
v
oltage
O
,
R
L
= 2 kΩ
Full range 15 25
V/mV
r
i
Input resistance T
A
= 25°C 10
12
10
12
Ω
CMRR Common-mode rejection ratio R
S
≤ 2 kΩ 70 100 80 100 dB
k
SVR
Supply-voltage rejection ratio See Note 2 70 100 80 100 dB
I
CC
Supply current 8 11 8 11 mA
†
Full range is 0°C to 70°C.
‡
Input bias currents of a FET-input operational amplifier are normal junction reverse currents, which are temperature sensitive. Pulse techniques
must be used that will maintain the junction temperatures as close to the ambient temperature as possible.
NOTE 2: Supply-voltage rejection ratio is measured for both supply magnitudes increasing or decreasing simultaneously.
operating characteristics, V
CC±
= ±15 V
PARAMETER TEST CONDITIONS MIN TYP MAX
UNIT
V
O1
/V
O2
Crosstalk attentuation f = 1 kHz 120 dB
SR Slew rate 8 13 V/µs
B
1
Unity-gain bandwidth 3 MHz
V
n
Equivalent input noise voltage f = 1 kHz, R
S
= 20 Ω 18 nV/√Hz
I
n
Equivalent input noise current f = 1 kHz 0.01 pA/√Hz