Page 1
LF347
Quad Operational Amplifier (JFET)
www.fairchildsemi.com
Features
• Low input bias current
• High input impedance
• Wide gain bandwidth: 4 MHz Typ.
• High slew rate: 13 V/µs Typ .
Internal Block Diagram
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 o ffset voltage and
bias current. LF347 may be used in cir cuits requiring high
input impedance. High slew rate and wide bandwidth, low
input bias current.
14-DIP
1
14-SOP
1
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.0
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LF347
Schematic Diagram
(One Section Only)
Absolute Maximum Ratings
Parameter Symbol Value Unit
Supply Voltage V
Differential Input Voltage V
Input Voltage Range V
CC
I(DIFF)
I
Output Short Circuit Duration - Continuous Power Dissipation P
Operating Temperature Range T
Storage Temperature Range T
D
OPR
STG
±18 V
30 V
±15 V
570 mW
0 ~ + 70 °C
-65 ~ + 150 °C
2
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Electrical Characteristics
(VCC= +15V, VEE= -15V, TA=25
°C, unless otherwise specified)
LF347
Parameter Symbol Conditions
Input Offset Voltage V
Input Offset Voltage Drift(Note2) ∆V
Input Offset Current I
Input Bias Current I
Large Signal Voltage Gain G
Output Voltage Swing V
Input Voltage Range V
IO
/∆TRS = 10KΩ -10- µV/
IO
IO
BIAS
V
O(PP)
I(R)
Common-Mode Rejection Ratio CMRR R
Power Supply Rejection Ratio PSRR R
Input Resistance R
Supply Current I
I
CC
RS = 10KΩ -510
Note 1 - - 13
Note 1 - - 4 nA
Note 1 - - 8 nA
RL = 2KΩ 25 100 -
V
= ±10V Note 1 15 - -
O(P-P)
RL = 10KΩ±12 ±13.5 - V
- ±11
≤ 10KΩ 80 100 - dB
S
≤ 10KΩ 80 100 - dB
S
- -10
- -7.211 mA
LF347
Min. Typ. Max.
- 25 100 pA
- 50 200 pA
+15
-12
12
-V
- Ω
Unit
mV
°C
V/mV
Slew Rate SR - -13- V/µS
Gain Bandwidth Product(Note2) GBW - -4- MHz
Channel Seperation
Equivalent Input Noise
Voltage
Equivalent Input Noise
Current
CS
e
I
N
N
f = 1Hz ~ 20Khz
(input referenced)
RS = 100Ω
f = 1KHz
- 120 - dB
-20-
f = 1KHz - 0.01 - pA/
nV/
Hz
Hz
Note :
1. LF347 : 0≤T
≤+70 °C
A
2. Guaranteed by design
3
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LF347
Mechanical Dimensions
Package
6.40
±0.20
0.252
±0.008
14-DIP
Dimensions in millimeters
2.08
0.082
()
#1
#7
7.62
0.300
#14
#8
MAX
19.80
0.780
0.128
3.25
±0.20
±0.008
19.40
0.764
±0.20
±0.008
0.20
0.008
±0.10
0.46
2.54
MIN
±0.004
0.018
0.100
±0.10
1.50
±0.004
0.059
3.30
0.130
±0.30
±0.012
0~15°
0.25
0.010
5.08
0.200
+0.10
–0.05
+0.004
–0.002
MAX
4
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LF347
Mechanical Dimensions
Package
#1
(Continued)
14-SOP
#14
1.55
0.061
MAX
8.70
0.343
Dimensions in millimeters
0.05
MIN
0.002
±0.10
±0.004
0.47
0.10
±0.008
±0.20
8.56
0.337
-0.05
+
0.406
0.004
+
0.019
()
-0.002
0.016
0.10
+
-0.05
0.20
0.60
0.024
0.004
+
-0.002
0.008
±0.20
±0.008
#7
6.00
0.236
3.95
0.156
5.72
0.225
±0.30
±0.012
±0.20
±0.008
#8
0~8°
1.80
0.071
MAX
MAX0.10
MAX0.004
1.27
0.050
5
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LF347
Ordering Information
Product Number Package Operating Temperature
LF347N 14-DIP
LF347M 14-SOP
0 ~ + 70°C
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURT HER NOTICE TO ANY
PRODUCTS HEREI N TO IMPROVE RELIABILITY, FUNCTIO N OR DESIGN. FAIRCH IL D DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER IT S PATENT RIGHTS, NOR THE RIGHTS OF OTHE RS.
LIFE SUPPORT POL I CY
FAIRCHILD’S PR ODUCTS ARE NOT AUTH ORIZED FOR USE AS C RITICAL COMPONENT S IN LIFE SUPPORT DE VICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein :
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
2. A critical component in any component of a life support
device or sy stem whose fai lure to perform can be
reasonably expec ted to cause the failur e of the life support
device or system, or to affect its safety or effec t iv ene ss .
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
www.fairchildsemi.com
6/1/01 0.0m 001
2001 Fairchild Semiconductor Corporation
Stock#DSxxxxxxxx
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