LF147, LF347-N
www.ti.com
SNOSBH1D – MAY 1999 – REVISED MARCH 2013
LF147/LF347 Wide Bandwidth Quad JFET Input Operational Amplifiers
Check for Samples: LF147, LF347-N
FEATURES
DESCRIPTION
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The LF147 is a low cost, high speed quad JFET input
operational amplifier with an internally trimmed input
offset voltage ( BI-FET II™ technology). The device
requires a low supply current and yet maintains a
large gain bandwidth product and a fast slew rate. In
addition, well matched high voltage JFET input
devices provide very low input bias and offset
currents. The LF147 is pin compatible with the
standard LM148. This feature allows designers to
immediately upgrade the overall performance of
existing LF148 and LM124 designs.
1
23
Internally Trimmed Offset Voltage: 5 mV max
Low Input Bias Current: 50 pA
Low Input Noise Current: 0.01 pA/√Hz
Wide Gain Bandwidth: 4 MHz
High Slew Rate: 13 V/μs
Low Supply Current: 7.2 mA
High Input Impedance: 1012Ω
Low Total Harmonic Distortion: ≤0.02%
Low 1/f Noise Corner: 50 Hz
Fast Settling Time to 0.01%: 2 μs
Simplified Schematic
The LF147 may be used in applications such as high
speed integrators, fast D/A converters, sample-andhold circuits and many other circuits requiring low
input offset voltage, low input bias current, high input
impedance, high slew rate and wide bandwidth. The
device has low noise and offset voltage drift.
Connection Diagram
¼ Quad
LF147 available as per JM38510/11906.
Figure 1. 14-Pin PDIP / CDIP / SOIC
Top View
See Package Number J0014A, D0014A or
NFF0014A
1
2
3
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
BI-FET II is a trademark of dcl_owner.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1999–2013, Texas Instruments Incorporated
LF147, LF347-N
SNOSBH1D – MAY 1999 – REVISED MARCH 2013
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
Absolute Maximum Ratings
(1) (2)
LF147
LF347B/LF347
±22V
±18V
Differential Input Voltage
±38V
±30V
(3)
±19V
±15V
Continuous
Continuous
900 mW
1000 mW
Supply Voltage
Input Voltage Range
Output Short Circuit Duration
Power Dissipation
(4)
(5) (6)
Tj max
150°C
θjA
150°C
CDIP (J) Package
70°C/W
PDIP (NFF) Package
75°C/W
SOIC Narrow (D)
100°C/W
SOIC Wide (D)
85°C/W
Operating Temperature Range
See
Lead Temperature (Soldering, 10 sec.)
ESD Tolerance
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
260°C
260°C
SOIC Package
Vapor Phase (60 seconds)
215°C
Infrared (15 seconds)
220°C
(8)
900V
(1) (2)
Parameter
Conditions
LF147
Min
VOS
Input Offset Voltage
RS=10 kΩ, TA=25°C
ΔVOS/Δ
T
Average TC of Input
Offset Voltage
RS=10 kΩ
IOS
Input Offset Current
Tj=25°C,
Max
1
5
10
(2) (3)
Input Bias Current
RIN
Input Resistance
Tj=25°C,
(2) (3)
25
50
LF347
Typ
Max
3
5
10
100
200
25
50
Max
5
10
13
100
25
200
50
1012
mV
mV
μV/°C
10
8
1012
Units
Typ
4
50
1012
Min
7
25
Over Temperature
Tj=25°C
Min
8
Over Temperature
IB
LF347B
Typ
Over Temperature
2
260°C
Soldering (10 seconds)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits.
If Military/Aerospace specified devices are required, please contact the TI Sales Office/Distributors for availability and specifications.
Unless otherwise specified the absolute maximum negative input voltage is equal to the negative power supply voltage.
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.
For operating at elevated temperature, these devices must be derated based on a thermal resistance of θjA.
Max. Power Dissipation is defined by the package characteristics. Operating the part near the Max. Power Dissipation may cause the
part to operate outside ensured limits.
The LF147 is available in the military temperature range −55°C≤TA≤125°C, while the LF347B and the LF347 are available in the
commercial temperature range 0°C≤TA≤70°C. Junction temperature can rise to Tj max = 150°C.
Human body model, 1.5 kΩ in series with 100 pF.
Symbol
(3)
(7)
PDIP / CDIP
DC Electrical Characteristics
(1)
(2)
See
−65°C≤TA≤150°C
Storage Temperature Range
Soldering Information
(7)
100
pA
4
nA
200
pA
8
nA
Ω
Refer to RETS147X for LF147D and LF147J military specifications.
Unless otherwise specified the specifications apply over the full temperature range and for VS=±20V for the LF147 and for VS=±15V for
the LF347B/LF347. VOS, IB, and IOS are measured at VCM=0.
The input bias currents are junction leakage currents which approximately double for every 10°C increase in the junction temperature,
Tj. Due to limited production test time, the input bias currents measured are correlated to junction temperature. In normal operation the
junction temperature rises above the ambient temperature as a result of internal power dissipation, PD. Tj=TA+θjA PD where θjA 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.
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Copyright © 1999–2013, Texas Instruments Incorporated
Product Folder Links: LF147 LF347-N
LF147, LF347-N
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SNOSBH1D – MAY 1999 – REVISED MARCH 2013
DC Electrical Characteristics (1)(2) (continued)
Symbol
AVOL
Parameter
Conditions
Large Signal Voltage Gain VS=±15V, TA=25°C
LF147
Min
Typ
50
LF347B
Max
Min
Typ
100
50
LF347
Max
Min
Typ
100
25
100
Units
Max
V/mV
VO=±10V, RL=2 kΩ
Over Temperature
25
VO
Output Voltage Swing
VS=±15V, RL=10 kΩ
±12
±13.
5
±12
±13.
5
±12
±13.
5
V
VCM
Input Common-Mode
Voltage Range
VS=±15V
±11
+15
±11
+15
±11
+15
V
CMRR
Common-Mode Rejection
Ratio
RS≤10 kΩ
PSRR
Supply Voltage Rejection
Ratio
See
IS
Supply Current
(4)
25
−12
(4)
15
−12
V/mV
−12
V
80
100
80
100
70
100
dB
80
100
80
100
70
100
dB
7.2
11
7.2
11
7.2
11
mA
Supply voltage rejection ratio is measured for both supply magnitudes increasing or decreasing simultaneously in accordance with
common practice from VS = ± 5V to ±15V for the LF347 and LF347B and from VS = ±20V to ±5V for the LF147.
AC Electrical Characteristics
Symbol
(1) (2)
Parameter
Conditions
LF147
Min
Amplifier to Amplifier
Coupling
Typ
LF347B
Max Min
−120
TA=25°C,
Typ
LF347
Max Min
−120
Typ
Units
Max
−120
dB
13
V/μs
f=1 Hz−20 kHz
(Input Referred)
SR
Slew Rate
VS=±15V, TA=25°C
8
GBW
Gain-Bandwidth Product
VS=±15V, TA=25°C
2.2
4
MHz
en
Equivalent Input Noise
Voltage
TA=25°C, RS=100Ω,
f=1000 Hz
20
20
20
nV / √Hz
in
Equivalent Input Noise
Current
Tj=25°C, f=1000 Hz
0.01
0.01
0.01
pA / √Hz
THD
Total Harmonic Distortion
AV=+10, RL=10k,
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