LF357N National Semiconductor, LF357N Datasheet

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LF357N

Manufacturer Part Number
LF357N
Description
IC OP AMP JFET INPUT 8DIP
Manufacturer
National Semiconductor
Series
BI-FET™r
Datasheet

Specifications of LF357N

Amplifier Type
J-FET
Number Of Circuits
1
Slew Rate
50 V/µs
Gain Bandwidth Product
20MHz
Current - Input Bias
30pA
Voltage - Input Offset
3000µV
Current - Supply
5mA
Voltage - Supply, Single/dual (±)
10 V ~ 36 V, ±5 V ~ 18 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Output Type
-
Current - Output / Channel
-
-3db Bandwidth
-
Other names
*LF357N
LF357

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C 1995 National Semiconductor Corporation
LF155 LF156 LF157 Series Monolithic
JFET Input Operational Amplifiers
General Description
These are the first monolithic JFET input operational ampli-
fiers to incorporate well matched high voltage JFETs on the
same chip with standard bipolar transistors (BI-FET
nology) These amplifiers feature low input bias and offset
currents low offset voltage and offset voltage drift coupled
with offset adjust which does not degrade drift or common-
mode rejection The devices are also designed for high slew
rate wide bandwidth extremely fast settling time low volt-
age and current noise and a low 1 f noise corner
Advantages
Y
Y
Y
Y
Y
Y
Applications
Y
Y
Y
Y
Y
Simplified Schematic
BI-FET
3 pF in LF157 series
Replace expensive hybrid and module FET op amps
Rugged JFETs allow blow-out free handling compared
with MOSFET input devices
Excellent for low noise applications using either high or
low source impedance very low 1 f corner
Offset adjust does not degrade drift or common-mode
rejection as in most monolithic amplifiers
New output stage allows use of large capacitive loads
(5 000 pF) without stability problems
Internal compensation and large differential input volt-
age capability
Precision high speed integrators
Fast D A and A D converters
High impedance buffers
Wideband low noise low drift amplifiers
Logarithmic amplifiers
TM
BI-FET II
TM
are trademarks of National Semiconductor Corporation
TL H 5646
TM
Tech-
Y
Y
Common Features
(LF155A LF156A LF157A)
Y
Y
Y
Y
Y
Y
Y
Y
Uncommon Features
Y
Y
Y
Y
Photocell amplifiers
Sample and Hold circuits
Low input bias current
Low Input Offset Current
High input impedance
Low input offset voltage
Low input offset voltage temp drift
Low input noise current
High common-mode rejection ratio
Large dc voltage gain
Extremely
fast settling
time to
0 01%
Fast slew
rate
Wide gain
bandwidth
Low input
noise voltage
LF155A LF156A
4
5
2 5
20
1 5
12
12
5
RRD-B30M115 Printed in U S A
TL H 5646– 1
LF157A
(A
December 1994
V
1 5
50
20
12
e
0 01 pA Hz
5)
3 V C
nV Hz
100 dB
106 dB
10
Units
V
30 pA
MHz
1 mV
3 pA
12
s
s

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LF357N Summary of contents

Page 1

... Y Wideband low noise low drift amplifiers Y Logarithmic amplifiers Y Simplified Schematic LF157 series BI-FET TM BI-FET II TM are trademarks of National Semiconductor Corporation C 1995 National Semiconductor Corporation TL H 5646 Photocell amplifiers Y Sample and Hold circuits Y TM Tech- Common Features (LF155A LF156A LF157A) Low input bias current ...

Page 2

... Absolute Maximum Ratings If Military Aerospace specified devices are required contact the National Semiconductor Sales Office Distributors for availability and specifications (Note 8) Supply Voltage Differential Input Voltage Input Voltage Range (Note 2) Output Short Circuit Duration T jMAX H-Package N-Package M-Package Power Dissipation (Notes 1 and 9) ...

Page 3

DC Electrical Characteristics Symbol Parameter V Input Common-Mode CM Voltage Range CMRR Common-Mode Rejection Ratio PSRR Supply Voltage Rejection Ratio AC Electrical Characteristics Symbol Parameter Conditions SR Slew Rate LF155A 6A A LF157A A GBW Gain Bandwidth Product t Settling ...

Page 4

DC Electrical Characteristics LF155A 155 LF255 LF355 Parameter LF355A 355B Typ Max Typ Supply Current Electrical Characteristics Symbol Parameter Conditions SR Slew Rate LF155 6 A LF157 A GBW Gain Bandwidth Product t Settling Time to ...

Page 5

Typical DC Performance Characteristics Curves are for LF155 LF156 and LF157 unless otherwise specified Input Bias Current Voltage Swing Negative Current Limit Negative Common-Mode Input Voltage Limit Input Bias Current Input Bias Current Supply Current Supply Current Positive Common-Mode Positive ...

Page 6

Typical AC Performance Characteristics Gain Bandwidth Output Impedance LF155 Small Signal Pulse Response 5646– 5 LF155 Large Signal Pulse Response 5646– 8 Gain Bandwidth Output Impedance ...

Page 7

Typical AC Performance Characteristics Inverter Settling Time Bode Plot Common-Mode Rejection Ratio Undistorted Output Voltage Swing (Continued) Open Loop Frequency Inverter Settling Time Response Bode Plot Bode Plot Power Supply Rejection Ratio Equivalent Input Noise Equivalent Input Noise Voltage Voltage ...

Page 8

... LM156H 883 LM157AH 883 or LM157H 883 See NS Package Number H08C Available per JM38510 11401 or JM38510 11402 Dual-In-Line Package (M and 5646–14 Order Number LF355M LF356M LF357M LF355BM LF356BM LF355BN LF356BN LF357BN LF355N LF356N or LF357N See NS Package Number M08A or N08E 5646 – 5646 – 29 ...

Page 9

Application Hints The LF155 6 7 series are op amps with JFET input de- vices These JFETs have large reverse breakdown voltages from gate to source and drain eliminating the need for clamps across the inputs Therefore large differential input ...

Page 10

Typical Applications Large Signal inverter Output V LF355 TL H 5646–17 Low Drift Adjustable Voltage Reference Settling Time Test Circuit Settling time is tested with the LF155 6 connected as unity gain inverter and LF157 connected for ...

Page 11

Typical Applications (Continued OUT REF Ri 8-Bit D A Converter with Symmetrical Offset Binary Operation ...

Page 12

Typical Applications (Continued) Wide BW Low Noise Low Drift Amplifier S r Power 191 kHz e MAX Parasitic input capacitance for LF155 LF156 and LF157 plus any additional layout capacitance) ...

Page 13

Typical Applications (Continued) High Impedance Low Drift Instrumentation Amplifier OUT R System V adjusted via Trim R3 to boost up CMRR to 120 dB Instrumentation amplifier resistor array recommended for best accuracy and lowest ...

Page 14

Typical Applications (Continued) Both amplifiers (A1 A2) have feedback loops individually closed with stable responses (overshoot negligible) Acquisition time T estimated provided that ...

Page 15

Typical Applications (Continued) High Q Band Pass Filter By adding positive feedback (R2) Q increases OUT V Clean layout recommended Response Vp-p tone burst 300 5646 – 28 High ...

Page 16

16 ...

Page 17

Physical Dimensions inches (millimeters) Order Number LF156AH LF155H LF156H LF255H LF256H LF257H LF355AH LF356AH LF357AH LF356BH Order Number LF355M LF356M LF357M LF355BM or LF356BM Metal Can Package (H) LF355H LF356H or LF357H NS Package Number H08C Small Outline Package (M) ...

Page 18

... Physical Dimensions inches (millimeters) (Continued) Order Number LF355N LF356N LF357N LF355BN LF356BN LF357BN LIFE SUPPORT POLICY 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 OF NATIONAL SEMICONDUCTOR CORPORATION As used herein ...

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