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PDF LF347N Data sheet ( Hoja de datos )

Número de pieza LF347N
Descripción Wide Bandwidth Quad JFET Input Operational Amplifiers
Fabricantes National Semiconductor 
Logotipo National Semiconductor Logotipo



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No Preview Available ! LF347N Hoja de datos, Descripción, Manual

May 1999
LF147/LF347
Wide Bandwidth Quad JFET Input Operational Amplifiers
General Description
The LF147 is a low cost, high speed quad JFET input opera-
tional amplifier with an internally trimmed input offset voltage
(BI-FET IItechnology). 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 up-
grade 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.
Features
n Internally trimmed offset voltage: 5 mV max
n Low input bias current: 50 pA
n Low input noise current:
n Wide gain bandwidth: 4 MHz
n High slew rate: 13 V/µs
n Low supply current: 7.2 mA
n High input impedance: 1012
n Low total harmonic distortion AV=10,: <0.02%
RL=10k, VO=20 Vp-p, BW=20 Hz−20 kHz
n Low 1/f noise corner: 50 Hz
n Fast settling time to 0.01%: 2 µs
Simplified Schematic
14 Quad
Connection Diagram
Dual-In-Line Package
DS005647-13
DS005647-1
Note 1: Available per SMD #8102306, JM38510/11906.
Top View
Order Number LF147J, LF347M, LF347BN,
LF347N or LF147J/883 (Note 1)
See NS Package Number J14A, M14A or N14A
BI-FET IIis a trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS005647
www.national.com

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LF347N pdf
Typical Performance Characteristics (Continued)
Gain Bandwidth
Bode Plot
Slew Rate
DS005647-23
Distortion vs Frequency
DS005647-24
DS005647-25
Undistorted Output Voltage
Swing
Open Loop Frequency
Response
DS005647-26
Common-Mode Rejection
Ratio
DS005647-27
Power Supply Rejection
Ratio
DS005647-28
Equivalent Input Noise
Voltage
DS005647-29
DS005647-30
DS005647-31
5 www.national.com

5 Page





LF347N arduino
Typical Applications (Continued)
Universal State Variable Filter
For circuit shown:
fo=3 kHz, fNOTCH=9.5 kHz
Q=3.4
Passband gain:
Highpass — 0.1
Bandpass — 1
Lowpass — 1
Notch — 10
foxQ200 kHz
10V peak sinusoidal output swing without slew limiting to 200 kHz
See LM148 data sheet for design equations
DS005647-12
11 www.national.com

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