[Pacific Wireless]

MMDS / ISM / S-Band Downconverter 1800 to 4800 MHz Operation

Description
The C2304 is a flexible high intercept and high gain down conversion GaAs MMIC packaged in a compact 14 pin SOIC package. Each sub-circuit is brought out on separate pins to allow for custom filterin g on the IF/RF mixer interstage or custom matching for specific bands. Broadband parallel feedback networks are used on the gain and LO driver stages and the mixer is a singly balanced, two diode type mixer. The FET source of the IF amplifier stage (IF BIAS) is accessible for AC bypassing which allows for current reduction with DC source degeneration. The gain and DC current is broken up as follows: RF AMP gain = 14dB, current = 22 mA; LO AMP gain = 11dB, current = 28ma; IF AMP gain = 18dB, current = 60 mA, MIXER conversion loss = -6dB. Simple external matching circuits can be implemented for all ports to achieve VSWR’s <2:1 over moderate
bandwidths of less than 400MHz.

FEATUREs
·  1800 to 4800 MHz RF
·  10 to 900 MHz IF
·  26 dB Gain, 4dB Noise Figure
·  Single 5V Supply
·  27 dBm Output IP3
·  Separate RF AMP, MI XER/LO AMP and IF AMP cells.
·  75 ohm IF output impedance

APPLICATIONs
·  2.4 GHz ISM Band Applications
·  MMDS Downconverters
·  Wireless Bridges
·  Wireless Local Loop Systems
·  S Band Receivers
·  Wireless LANS and WANS
·  Point to Multipoint Receivers
·  2.4GHz Consumer Applications
·  Bluetooth Applications
·  Upconverters