LF441 Power JFET Input Operational Amplifier LF441 power operatio

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LF441 Power JFET Input Operational Amplifier LF441 power operatio

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LF441 Power JFET Input Operational Amplifier
LF441 Power JFET Input Operational Amplifier
LF441 power operational amplifier provides many same characteristics industry standard LM741 while greatly improving characteristics LM741 amplifier same bandwidth slew rate gain load) LM741 only draws tenth supply current LM741 addition well matched high voltage JFET input devices LF441 reduce input bias offset currents factor over LM741 combination careful layout design internal trimming guarantees very input offset voltage voltage drift LF441 also very equivalent input noise voltage power amplifier LF441 compatible with LM741 allowing immediate times reduction power drain many applications LF441 should used where power dissipation good electrical characteristics major considerations
Features
supply current LM741 input bias current input offset voltage input offset voltage drift High gain bandwidth High slew rate noise voltage power input noise current High input impedance High gain
(max) (max) (max) (max) 1012X (min)
Typical Connection
Ordering Information
LF441XYZ indicates electrical grade indicates temperature range ``M'' military ``C'' commercial indicates package type ``H'' ``N''
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Connection Diagrams
Metal Package
Dual-In-Line Package
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View
Note connected case
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Order Number LF441MH Package Number H08A
View Order Number LF441ACN LF441CM LF441CN Package Number M08A N08E
BI-FETis trademark National Semiconductor Corporation C1995 National Semiconductor Corporation
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RRD-B30M115 Printed
Absolute Maximum Ratings
Military Aerospace specified devices required please contact National Semiconductor Sales Office Distributors availability specifications LF441A Supply Voltage Differential Input Voltage Power Dissipation (Notes ijA(Typical) Board Mount still Board Mount flow Operating Temp Range Storage Temp Range Lead Temperature (Soldering seconds) Soldering Information Dual-In-Line Package Soldering Small Outline Package Vapor Phase Infrared
LF441A Input Voltage Range (Note Output Short Circuit Duration
LF441
LF441
Continuous
Continuous
Package (Note LF441A LF441
Package
Package
(Note
AN-450 ``Surface Mounting Methods Their Effect Product Reliability'' other methods soldering surface mount devices Tolerance (Note Rating Determined
Electrical Characteristics (Note
Symbol Parameter Input Offset Voltage Conditions Over Temperature DVOS Average Input Offset Voltage Input Offset Current (Note (Notes Input Bias Current (Notes AVOL Input Resistance Large Signal Voltage Gain Over Temperature CMRR Output Voltage Swing Input Common-Mode Voltage Range Common-Mode Rejection Ratio
LF441A
LF441
Units
1012
1012
Electrical Characteristics (Note (Continued)
Symbol PSRR Parameter Supply Voltage Rejection Ratio Supply Current (Note Conditions LF441A LF441 Units
Electrical Characteristics (Note
Symbol Parameter Slew Rate Gain-Bandwidth Product Equivalent Input Noise Voltage Equivalent Input Noise Current Conditions 100X LF441A LF441 Units
Note Unless otherwise specified absolute maximum negative input voltage equal negative power supply voltage Note operating elevated temperature these devices must derated based thermal resistance Note temperature range designated position just before package type device number ``C'' indicates commercial temperature range ``M'' indicates military temperature range military temperature range available ``H'' package only Note Unless otherwise specified specifications apply over full temperature range LF441A LF441 measured Note LF441A 100% tested this specification Note input bias currents junction leakage currents which approximately double every increase junction temperature limited production test time input bias currents measured correlated junction temperature normal operation junction temperature rises above ambient temperature result internal power dissipation where thermal resistance from junction ambient heat sink recommended input bias current kept minimum Note Supply voltage rejection ratio measured both supply magnitudes increasing decreasing simultaneously accordance with common practice From LF441 from LF441A Note Refer RETS441X LF441MH military specifications Note Power Dissipation defined package characteristics Operating part near Power Dissipation cause part operate outside guaranteed limits Note Human body model series with
Typical Performance Characteristics
Input Bias Current Input Bias Current Supply Current
Positive Common-Mode Input Voltage Limit
Negative Common-Mode Input Voltage Limit
Positive Current Limit
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Typical Performance Characteristics (Continued)
Negative Current Limit Output Voltage Swing Output Voltage Swing
Gain Bandwidth
Bode Plot
Slew Rate
Distortion Frequency
Undistorted Output Voltage Swing
Open Loop Frequency Response
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Equivalent Input Noise Voltage
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Typical Performance Characteristics (Continued)
Open Loop Voltage Gain Output Impedance Inverter Settling Time
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Simplified Schematic
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Pulse Response
Small Signal Inverting
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Pulse Response
(Continued) Small Signal Non-Inverting
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Large Signal Inverting
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Large Signal Non-Inverting
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Application Hints
This device power with internally trimmed input offset voltage JFET input devices (BI-FET These JFETs have large reverse breakdown voltages from gate source drain eliminating need clamps across inputs Therefore large differential input voltages easily accommodated without large increase input current maximum differential input voltage independent supply voltages However neither input voltages should allowed exceed negative supply this will cause large currents flow which result destroyed unit Exceeding negative common-mode limit either input will force output high state potentially causing reversal phase output Exceeding negative common-mode limit both inputs will force amplifier output high state neither case does latch occur since raising input back within common-mode range again puts input stage thus amplifier normal operating mode Exceeding positive common-mode limit single input will change phase output however both inputs exceed limit output amplifier will forced high state amplifier will operate with common-mode input voltage equal positive supply however gain bandwidth slew rate decreased this condition When negative common-mode voltage swings within negative supply increase input offset voltage occur amplifier biased allow normal circuit operation with power supplies Supply voltages less than these degrade common-mode rejection restrict output voltage swing amplifier will drive load resistance over full temperature range Precautions should taken ensure that power supply integrated circuit never becomes reversed polarity that unit inadvertently installed backwards socket unlimited current surge through resulting forward diode within could cause fusing internal conductors result destroyed unit with most amplifiers care should taken with lead dress component placement supply decoupling order ensure stability example resistors from output input should placed with body close input minimize ``pick-up'' maximize frequency feedback pole minimizing capacitance from input ground feedback pole created when feedback around amplifier resistive parallel resistance capacitance from input device (usually inverting input ground) frequency this pole many instances frequency this pole much greater than expected frequency closed loop gain consequently there negligible effect stability margin However feedback pole less than approximately times expected frequency lead capacitor should placed from output input value added capacitor should such that time constant this capacitor resistance parallels greater than equal original feedback pole time constant
Detailed Schematic
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Physical Dimensions inches (millimeters)
Metal Package Order Number LF441MH Package Number H08A
Dual-In-Line Package(M) Order Number LF441CM Package Number M08A
LF441 Power JFET Input Operational Amplifier
Physical Dimensions inches (millimeters) (Continued)
Molded Dual-In-Line Package Order Number LF441ACN LF441CN Package Number N08E
LIFE SUPPORT POLICY NATIONAL'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT NATIONAL SEMICONDUCTOR CORPORATION used herein Life support devices systems devices systems which intended surgical implant into body support sustain life whose failure perform when properly used accordance with instructions provided labeling reasonably expected result significant injury user
National Semiconductor Corporation 1111 West Bardin Road Arlington 76017 1(800) 272-9959 1(800) 737-7018
critical component component life support device system whose failure perform reasonably expected cause failure life support device system affect safety effectiveness
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National does assume responsibility circuitry described circuit patent licenses implied National reserves right time without notice change said circuitry specifications

LF441 Power JFET Input Operational Amplifier LF441 power operatio

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