lf412ch National Semiconductor Corporation, lf412ch Datasheet

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lf412ch

Manufacturer Part Number
lf412ch
Description
Low Offset, Low Drift Dual Jfet Input Operational Amplifier
Manufacturer
National Semiconductor Corporation
Datasheet

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Part Number:
LF412CH
Manufacturer:
NS
Quantity:
5 510
© 2004 National Semiconductor Corporation
LF412
Low Offset, Low Drift Dual JFET Input Operational
Amplifier
General Description
These devices are low cost, high speed, JFET input opera-
tional amplifiers with very low input offset voltage and guar-
anteed input offset voltage drift. They require low supply
current yet maintain a large gain bandwidth product and fast
slew rate. In addition, well matched high voltage JFET input
devices provide very low input bias and offset currents. The
LF412 dual is pin compatible with the LM1558, allowing
designers to immediately upgrade the overall performance of
existing designs.
These amplifiers 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 and drift, low input bias current, high input imped-
ance, high slew rate and wide bandwidth.
Typical Connection
Ordering Information
X indicates electrical grade
Y indicates temperature range
Z indicates package type
BI-FET II
LF412XYZ
“M” for military
“C” for commercial
“H” or “N”
is a trademark of National Semiconductor Corporation.
DS005656
00565641
Features
n Internally trimmed offset voltage:
n Input offset voltage drift: 10 µV/˚C (max)
n Low input bias current: 50 pA
n Low input noise current:
n Wide gain bandwidth: 3 MHz (min)
n High slew rate: 10V/µs (min)
n Low supply current: 1.8 mA/Amplifier
n High input impedance: 10
n Low total harmonic distortion
n Low 1/f noise corner: 50 Hz
n Fast settling time to 0.01%: 2 µs
Connection Diagrams
See NS Package Number J08A or N08E
Order Number LF412ACN, LF412CN
Order Number LF412MH, LF412CH
See NS Package Number H08A
or LF412MH/883 (Note 1)
or LF412MJ/883 (Note 1)
Dual-In-Line Package
Metal Can Package
12
≤0.02%
1 mV (max)
00565642
www.national.com
August 2000
00565644

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lf412ch Summary of contents

Page 1

... Low supply current: 1.8 mA/Amplifier n High input impedance Low total harmonic distortion n Low 1/f noise corner Fast settling time to 0.01%: 2 µs Connection Diagrams Order Number LF412MH, LF412CH 00565641 See NS Package Number H08A Order Number LF412ACN, LF412CN See NS Package Number J08A or N08E DS005656 ...

Page 2

Simplified Schematic Note 1: Available per JM38510/11905 Detailed Schematic www.national.com 1/2 Dual 00565643 2 00565632 ...

Page 3

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 11) LF412A ± Supply Voltage ± Differential Input Voltage Input voltage Range ± (Note 3) Output Short Circuit ...

Page 4

AC Electrical Characteristics (Note 7) Symbol Parameter THD Total Harmonic Dist e Equivalent Input Noise n Voltage i Equivalent Input Noise n Current Note 3: Unless otherwise specified the absolute maximum negative input voltage is equal to the negative power ...

Page 5

Typical Performance Characteristics Supply Current Negative Common-Mode Input Voltage Limit Negative Current Limit (Continued) Positive Common-Mode 00565612 Positive Current Limit 00565614 Output Voltage Swing 00565616 5 Input Voltage Limit 00565613 00565615 00565617 www.national.com ...

Page 6

Typical Performance Characteristics Output Voltage Swing Bode Plot Distortion vs Frequency www.national.com (Continued) 00565618 00565620 Undistorted Output Voltage 00565622 6 Gain Bandwidth 00565619 Slew Rate 00565621 Swing 00565623 ...

Page 7

Typical Performance Characteristics Open Loop Frequency Response Power Supply Rejection Ratio Open Loop Voltage Gain (Continued) Common-Mode Rejection 00565624 Equivalent Input Noise 00565626 00565628 7 Ratio 00565625 Voltage 00565627 Output Impedance 00565629 www.national.com ...

Page 8

Typical Performance Characteristics Inverter Settling Time Pulse Response R =2 kΩ Small Signal Inverting Large Signal Inverting www.national.com (Continued) 00565630 = 00565636 00565638 8 Small Signal Non-Inverting 00565637 Large Signal Non-Inverting 00565639 ...

Page 9

Pulse Response R =2 kΩ Current Limit (R =100Ω) L Application Hints The LF412 series of JFET input dual op amps are internally trimmed (BI-FET II ™ ) providing very low input offset voltages and guaranteed input offset ...

Page 10

Typical Application www.national.com Single Supply Sample and Hold 10 00565631 ...

Page 11

... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LF412MH, LF412MH/883 or LF412CH Metal Can Package (H) NS Package Number H08A 11 www.national.com ...

Page 12

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) Dual-In-Line Package (J) Order Number LF412MJ/883 NS Package Number J08A Dual-In-Line Package (N) Order Number LF412ACN or LF412CN NS Package Number N08E 12 ...

Page 13

... 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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