www.fairchildsemi.com
LF347
Quad Operational Amplifier (JFET)
Features
•
•
•
•
Low input bias current
High input impedance
Wide gain bandwidth: 4 MHz Typ.
High slew rate: 13 V/µs Typ.
Description
The LF347 is a high speed quad JFET input operational
amplifier. This feature high input impedance, wide
bandwidth, high slew rate, and low input offset voltage and
bias current. LF347 may be used in circuits requiring high
input impedance. High slew rate and wide bandwidth, low
input bias current.
14-DIP
1
14-SOP
1
Internal Block Diagram
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
LF347
Schematic Diagram
(One Section Only)
Absolute Maximum Ratings
Parameter
Supply Voltage
Differential Input Voltage
Input Voltage Range
Output Short Circuit Duration
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Symbol
V
CC
V
I(DIFF)
V
I
-
P
D
T
OPR
T
STG
Value
±18
30
±15
Continuous
570
0 ~ + 70
-65 ~ + 150
Unit
V
V
V
-
mW
°C
°C
2
LF347
Electrical Characteristics
(V
CC
= +15V, V
EE
= -15V, T
A
=25
°C,
unless otherwise specified)
Parameter
Input Offset Voltage
Input Offset Voltage Drift(Note2)
Input Offset Current
Input Bias Current
Large Signal Voltage Gain
Output Voltage Swing
Input Voltage Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Input Resistance
Supply Current
Slew Rate
Gain Bandwidth Product(Note2)
Channel Seperation
Equivalent Input Noise
Voltage
Equivalent Input Noise
Current
Note :
1. LF347 : 0≤T
A
≤+70 °C
2. Guaranteed by design
Symbol
V
IO
∆V
IO
/∆T
I
IO
I
BIAS
G
V
V
O(PP)
V
I(R)
CMRR
PSRR
R
I
I
CC
SR
GBW
CS
R
S
≤
10KΩ
R
S
≤
10KΩ
-
-
-
-
f = 1Hz ~ 20Khz
(input referenced)
R
S
= 100Ω
f = 1KHz
f = 1KHz
R
L
= 2KΩ
V
O(P-P)
=
±10V
R
L
= 10KΩ
-
Note 1
Conditions
R
S
= 10KΩ
Note 1
R
S
= 10KΩ
Note 1
Note 1
LF347
Min.
-
-
-
-
-
-
-
25
15
±12
±11
80
80
-
-
-
-
-
-
-
Typ.
5
-
10
25
-
50
-
100
-
±13.5
+15
-12
100
100
10
12
7.2
13
4
120
20
0.01
Max.
10
13
-
100
4
200
8
-
-
-
-
-
-
-
11
-
-
-
-
-
Unit
mV
µV/ °C
pA
nA
pA
nA
V/mV
V
V
dB
dB
Ω
mA
V/µS
MHz
dB
nV/
Hz
e
N
I
N
pA/
Hz
3
LF347
Mechanical Dimensions
Package
Dimensions in millimeters
14-DIP
6.40
±0.20
0.252
±0.008
19.80
MAX
0.780
19.40
±0.20
0.764
±0.008
#7
#8
7.62
0.300
3.25
±0.20
0.128
±0.008
0.20
0.008 MIN
5.08
MAX
0.200
3.30
±0.30
0.130
±0.012
0.25
–0.05
+0.10
0~15
°
0.010
–0.002
+0.004
4
2.54
0.100
0.46
±0.10
0.018
±0.004
1.50
±0.10
0.059
±0.004
#1
#14
(
2.08
)
0.082
LF347
Mechanical Dimensions
(Continued)
Package
Dimensions in millimeters
14-SOP
MIN
1.55
±0.10
0.061
±0.004
0.05
0.002
0.47
)
0.019
MAX0.10
MAX0.004
1.27
0.050
+
0.10
0.406
-0.05
+
0.004
0.016
-0.002
(
#1
#14
8.70
MAX
0.343
#7
6.00
±0.30
0.236
±0.012
#8
1.80
MAX
0.071
+
0.10
0.20
-0.05
+
0.004
0.008
-0.002
3.95
±0.20
0.156
±0.008
0.60
±0.20
0.024
±0.008
5.72
0.225
0~
8
°
8.56
±0.20
0.337
±0.008
5
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