LM6221 NSC [National Semiconductor], LM6221 Datasheet

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LM6221

Manufacturer Part Number
LM6221
Description
High Speed Buffer
Manufacturer
NSC [National Semiconductor]
Datasheet

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© 2004 National Semiconductor Corporation
LM6121/LM6221/LM6321
High Speed Buffer
General Description
These high speed unity gain buffers slew at 800 V/µs and
have a small signal bandwidth of 50 MHz while driving a 50Ω
load. They can drive
while driving large capacitive loads. The LM6121 family are
monolithic ICs which offer performance similar to the
LH0002 with the additional features of current limit and
thermal shutdown.
These buffers are built with National’s VIP
grated PNP) process which provides fast PNP transistors
that are true complements to the already fast NPN devices.
This advanced junction-isolated process delivers high speed
performance without the need for complex and expensive
dielectric isolation.
Simplified Schematic
Numbers in ( ) are for 8-pin N DIP.
VIP
is a trademark of National Semiconductor Corporation.
±
300 mA peak and do not oscillate
DS009223
(Vertically Inte-
Features
n High slew rate:
n Wide bandwidth: 50 MHz
n Slew rate and bandwidth 100% tested
n Peak output current:
n High input impedance: 5 MΩ
n LH0002H pin compatible
n No oscillations with capacitive loads
n 5V to
n Current and thermal limiting
n Fully specified to drive 50Ω lines
Applications
n Line Driving
n Radar
n Sonar
±
15V operation guaranteed
00922301
800 V/µs
±
300 mA
www.national.com
March 2004

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LM6221 Summary of contents

Page 1

... LM6121/LM6221/LM6321 High Speed Buffer General Description These high speed unity gain buffers slew at 800 V/µs and have a small signal bandwidth of 50 MHz while driving a 50Ω ± load. They can drive 300 mA peak and do not oscillate while driving large capacitive loads. The LM6121 family are ...

Page 2

... These pins are at V potential. www.national.com Plastic DIP 00922302 Order Number LM6221N, LM6321N or LM6121J/883 See NS Package Number J08A or N08E Metal Can 00922303 Top View Order Number LM6221H or LM6121H/883 See NS Package Number H08C Plastic SOIC 00922307 Order Number LM6321M See NS Package Number M14A 2 ...

Page 3

... 50Ω unless otherwise noted. S LM6121 LM6221 LM6321 Limit Limit Limit (Notes 5, 9) (Note 5) (Note 5) 0.980 0.980 0.970 0.970 0.950 0.950 0.860 0.860 0.850 ...

Page 4

... A high speed measurement is done to , θ , and T . The maximum allowable power dissipation at any ambient temperature is P J(max 50Ω unless otherwise noted. S LM6121 LM6221 LM6321 Limit Limit Limit (Note 5) (Note 5) (Note 5) 550 550 550 550 ...

Page 5

Typical Performance Characteristics T = 25˚C, unless otherwise specified J Frequency Response Slew Rate vs Temperature Large Signal Response kΩ L Frequency Response 00922311 Overshoot vs Capacitive Load 00922313 Large Signal Response 00922315 5 00922312 00922314 R ...

Page 6

Typical Performance Characteristics Supply Current Slew Rate Power Bandwidth www.national.com T = 25˚C, unless otherwise specified (Continued) J 00922317 00922319 Input Return Gain (S11) 00922321 6 −3 dB Bandwidth 00922318 Slew Rate 00922320 00922322 ...

Page 7

Typical Performance Characteristics Forward Transmission Gain (S12) Application Hints POWER SUPPLY DECOUPLING The method of supply bypassing is not critical for stability of the LM6121 series buffers. However, their high current out- put combined with high slew rate can result ...

Page 8

Application Hints (Continued) pation in any application simple case of a buffer driving a resistive load as in Figure 2, the maximum DC power dissipation occurs when the output is at half the supply. Assuming ...

Page 9

... Physical Dimensions inches (millimeters) unless otherwise noted Metal Can Package (H) Order Number LM6221H or LM6121H/883 NS Package Number H08C 8-Pin Ceramic Dual-In-Line Package (J) Order Number LM6121J/883 NS Package Number J08A 9 www.national.com ...

Page 10

... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) 14-Pin Small Outline Package (M) Order Number LM6321M NS Package Number M14A Molded Dual-In-Line Package (N) Order Number LM6221N or LM6321N NS Package Number N08E 10 ...

Page 11

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 AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support ...

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