May 1998
LM6121/LM6221/LM6321
High Speed Buffer
General Description
Features
n High slew rate: 800 V/µs
n Wide bandwidth: 50 MHz
n Slew rate and bandwidth 100% tested
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
monolithic ICs which offer performance similar to the
LH0002 with the additional features of current limit and ther-
mal shutdown.
±
n Peak output current:
300 mA
n High input impedance: 5 MΩ
n LH0002H pin compatible
n No oscillations with capacitive loads
n 5V to 15V operation guaranteed
n Current and thermal limiting
™
These buffers are built with National’s VIP (Vertically Inte-
±
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 di-
electric isolation.
n Fully specified to drive 50Ω lines
Applications
n Line Driving
n Radar
n Sonar
Simplified Schematic
DS009223-1
Numbers in ( ) are for 8-pin N DIP.
™
VIP is a trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation
DS009223
www.national.com