lf147j-883 National Semiconductor Corporation, lf147j-883 Datasheet

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lf147j-883

Manufacturer Part Number
lf147j-883
Description
Wide Bandwidth Quad Jfet Input Operational Amplifiers
Manufacturer
National Semiconductor Corporation
Datasheet
© 2004 National Semiconductor Corporation
LF147/LF347
Wide Bandwidth Quad JFET Input Operational Amplifiers
General Description
The LF147 is a low cost, high speed quad JFET input
operational amplifier with an internally trimmed input offset
voltage (BI-FET II
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 stan-
dard LM148. This feature allows designers to immediately
upgrade the overall performance of existing LF148 and
LM124 designs.
The LF147 may be used in applications such as high speed
integrators, fast D/A converters, sample-and-hold 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.
Simplified Schematic
BI-FET II
is a trademark of National Semiconductor Corporation.
technology). The device requires a low
1
4
Quad
DS005647
00564713
Features
n Internally trimmed offset voltage:
n Low input bias current:
n Low input noise current:
n Wide gain bandwidth:
n High slew rate:
n Low supply current:
n High input impedance:
n Low total harmonic distortion:
n Low 1/f noise corner:
n Fast settling time to 0.01%:
Connection Diagram
Note 1: LF147 available as per JM38510/11906.
See NS Package Number J14A, M14A or N14A
Order Number LF147J, LF147J-SMD, LF347M,
LF347BN, LF347N, LF147J/883,
or JL147 BCA (Note 1)
Dual-In-Line Package
Top View
www.national.com
August 2000
0.01 pA/
5 mV max
00564701
13 V/µs
≤0.02%
7.2 mA
4 MHz
10
50 pA
50 Hz
2 µs
12
Hz

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lf147j-883 Summary of contents

Page 1

... High input impedance: n Low total harmonic distortion: n Low 1/f noise corner: n Fast settling time to 0.01%: Connection Diagram Note 1: LF147 available as per JM38510/11906. 00564713 Order Number LF147J, LF147J-SMD, LF347M, LF347BN, LF347N, LF147J/883, See NS Package Number J14A, M14A or N14A DS005647 August 2000 5 mV max 50 pA √ ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. LF147 ± Supply Voltage ± Differential Input Voltage ± Input Voltage Range (Note 3) Output Short Circuit Continuous Duration ...

Page 3

... LF347 and LF347B and from V S 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 outside guaranteed limits. ...

Page 4

Typical Performance Characteristics Input Bias Current Supply Current Negative Common-Mode Input Voltage Limit www.national.com 00564714 Positive Common-Mode 00564716 Positive Current Limit 00564718 4 Input Bias Current 00564715 Input Voltage Limit 00564717 00564719 ...

Page 5

Typical Performance Characteristics Negative Current Limit Output Voltage Swing Bode Plot (Continued) Output Voltage Swing 00564720 00564722 00564724 5 00564721 Gain Bandwidth 00564723 Slew Rate 00564725 www.national.com ...

Page 6

Typical Performance Characteristics Distortion vs Frequency Open Loop Frequency Response Power Supply Rejection Ratio www.national.com (Continued) Undistorted Output Voltage 00564726 Common-Mode Rejection 00564728 Equivalent Input Noise 00564730 6 Swing 00564727 Ratio 00564729 Voltage 00564731 ...

Page 7

Typical Performance Characteristics Open Loop Voltage Gain Inverter Settling Time (Continued) Output Impedance 00564732 00564734 7 00564733 www.national.com ...

Page 8

Pulse Response R =2 kΩ Small Signal Inverting Small Signal Non-Inverting Application Hints The LF147 amp with an internally trimmed input offset voltage and JFET input devices (BI-FET II). These JFETs have large reverse breakdown ...

Page 9

Application Hints (Continued) Exceeding the positive common-mode limit on a single input will not change the phase of the output; however, if both inputs exceed the limit, the output of the amplifier will be forced to a high state. The ...

Page 10

Typical Applications All resistors 1% tolerance • Accuracy of better than 0.4% with standard 1% value resistors No offset adjustment necessary • Expandable to any number of stages • Very high input impedance www.national.com Digitally Selectable Precision Attenuator A1 A2 ...

Page 11

Typical Applications (Continued) Long Time Integrator with Reset, Hold and Starting Threshold Adjustment • V starts from zero and is equal to the integral of the input voltage with respect to the threshold voltage: OUT ≥V • Output starts when ...

Page 12

Typical Applications For circuit shown kHz, f =9.5 kHz o NOTCH Q=3.4 Passband gain: Highpass — 0.1 Bandpass — 1 Lowpass — 1 Notch — 10 • f xQ≤200 kHz o • 10V peak sinusoidal output swing without ...

Page 13

... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LF147J, LM147J-SMD or LF147J/883 Ceramic Dual-In-Line Package (J) NS Package Number J14A S.O. Package (M) Order Number LF347M or LF347MX NS Package Number M14A 13 www.national.com ...

Page 14

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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