LF412AMH National Semiconductor, LF412AMH Datasheet

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LF412AMH

Manufacturer Part Number
LF412AMH
Description
Low Offset/ Low Drift Dual JFET Input Operational Amplifier
Manufacturer
National Semiconductor
Datasheet

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LF412AMH
Manufacturer:
TI
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© 1999 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 cur-
rent 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.
LF412 dual is pin compatible with the LM1558, allowing de-
signers 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 cir-
cuits and many other circuits requiring low input offset volt-
age and drift, low input bias current, high input impedance,
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.
DS005656-41
DS005656
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 A
n Low 1/f noise corner: 50 Hz
n Fast settling time to 0.01%: 2 µs
Connection Diagrams
R
L
= 10k, V
See NS Package Number J08A or N08E
Order Number LF412AMH, LF412MH,
Order Number LF412ACN, LF412CN
LF412CH or LF412MH/883 (Note 1)
See NS Package Number H08A
O
= 20 Vp-p, BW = 20 Hz-20 kHz
or LF412MJ/883 (Note 1)
Dual-In-Line Package
Metal Can Package
12
V
= 10,:
1 mV (max)
DS005656-42
0.02%
DS005656-44
www.national.com
April 1999

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LF412AMH Summary of contents

Page 1

... O n Low 1/f noise corner Fast settling time to 0.01%: 2 µs Connection Diagrams Metal Can Package DS005656-42 Order Number LF412AMH, LF412MH, LF412CH or LF412MH/883 (Note 1) See NS Package Number H08A Dual-In-Line Package Order Number LF412ACN, LF412CN or LF412MJ/883 (Note 1) See NS Package Number J08A or N08E April 1999 0 ...

Page 2

Simplified Schematic Note 1: Available per JM38510/11905 www.national.com 1/2 Dual DS005656-43 2 ...

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 22V ± Differential Input Voltage 38V Input voltage Range ± (Note 3) 19V Output Short Circuit Duration (Note 4) ...

Page 4

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

Page 5

Typical Performance Characteristics Negative Current Limit DS005656-16 Gain Bandwidth DS005656-19 Distortion vs Frequency DS005656-22 (Continued) Output Voltage Swing DS005656-17 Bode Plot DS005656-20 Undistorted Output Voltage Swing DS005656-23 5 Output Voltage Swing DS005656-18 Slew Rate DS005656-21 Open Loop Frequency Response DS005656-24 ...

Page 6

Typical Performance Characteristics Common-Mode Rejection Ratio DS005656-25 Open Loop Voltage Gain DS005656-28 Pulse Response = Small Signal Inverting www.national.com (Continued) Power Supply Rejection Ratio DS005656-26 Output Impedance DS005656- Small Signal ...

Page 7

Pulse Response = (Continued Large Signal Inverting DS005656-38 Application Hints The LF412 series of JFET input dual op amps are internally trimmed (BI-FET II ™ ) providing very low input ...

Page 8

Application Hints (Continued) pected 3 dB frequency a lead capacitor should be placed from the output to the input of the op amp. The value of the Typical Application Detailed Schematic www.national.com added capacitor should be such that the RC ...

Page 9

... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LF412AMH, LF412MH, LF412MH/883 or LF412CH Metal Can Package (H) NS Package Number H08A 9 www.national.com ...

Page 10

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) www.national.com 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 10 ...

Page 11

... 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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