August 1995
LMX2216
0.1 GHz to 2.0 GHz Low Noise Amplifier/Mixer
for RF Personal Communications
General Description
The LMX2216 is a monolithic, integrated low noise amplifier
(LNA) and mixer suitable as a first stage amplifier and down-
converter for RF receiver applications. The wideband oper-
ating capabilities of the LMX2216 allow it to function over
frequencies from 0.1 GHz to 2.0 GHz. It is fabricated using
National Semiconductor’s ABiC IV BiCMOS process.
The LMX2216 is available in a narrow-body 16-pin surface
mount plastic package.
Features
Y
Wideband RF operation from 0.1 GHz to 2.0 GHz
Y
No external biasing components necessary
All input and output ports of the LMX2216 are single-ended.
The LNA input and output ports are designed to interface to
a 50X system. The Mixer input ports are matched to 50X.
The output port is matched to 200X. The only external com-
ponents required are DC blocking capacitors. The balanced
architecture of the LMX2216 maintains consistent operating
parameters from unit to unit, since it is implemented in a
monolithic device. This consistency provides manufacturers
Y
3V operation
Y
LNA input and output ports matched to 50X
Y
Mixer input ports matched to 50X, output port matched
to 200X.
Y
Doubly balanced Gilbert cell mixer (single ended input
and output)
Y
Low power consumption
Y
Power down feature
a
significant advantage since tuning proceduresÐoften
Y
needed with discrete designsÐcan be reduced or eliminat-
ed.
Small outline, plastic surface mount package
Applications
Y
The low noise amplifier produces very flat gain over the en-
tire operating range. The doubly-balanced, Gilbert-cell mixer
provides good LO-RF isolation and cancellation of second-
order distortion products. A power down feature is imple-
mented on the LMX2216 that is especially useful for stand-
by operation common in Time Division Multiple Access
(TDMA) and Time Division Duplex (TDD) systems.
Digital European Cordless Telecommunications (DECT)
Y
Portable wireless communications (PCS/PCN, cordless)
Y
Wireless local area networks (WLANs)
Y
Digital cellular telephone systems
Y
Other wireless communications systems
Functional Block/Pin Diagram
TL/W/11814–1
Order Number LMX2216M
See NS Package Number M16A
C
1995 National Semiconductor Corporation
TL/W/11814
RRD-B30M115/Printed in U. S. A.