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 downconverter for RF receiver applications. The wideband operating 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.
All input and output ports of the LMX2216 are single-ended. The LNA input and output ports are designed to interface to a 50Xsystem. The Mixer input ports are matched to 50X. The output port is matched to 200X. The only external components 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 a significant advantage since tuning procedures often needed with discrete designsÐcan be reduced or eliminated.
The low noise amplifier produces very flat gain over the entire 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 implemented on the LMX2216 that is especially useful for standby operation common in Time Division Multiple Access (TDMA) and Time Division Duplex (TDD) systems.
The LMX2216 is available in a narrow-body 16-pin surface mount plastic package.
Features :
Wideband RF operation from 0.1 GHz to 2.0 GHz
No external biasing components necessary
3V operation
LNA input and output ports matched to 50X
Mixer input ports matched to 50X, output port matched to 200X.
Doubly balanced Gilbert cell mixer (single ended input and output)
Low power consumption
Power down feature
Small outline, plastic surface mount package
Applications :
Digital European Cordless Telecommunications (DECT)
Portable wireless communications (PCS/PCN, cordless)
Wireless local area networks (WLANs)
Digital cellular telephone systems
Other wireless communications systems
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