RF passive mixers

9 June 2010 Telecoms, Datacoms, Wireless, IoT

Analog Devices has introduced two new RF passive mixers for a variety of wireless applications, such as cellular base station receivers, transmit observation receivers and radio link down-converters. Designing for these applications requires high linearity and low noise and has always been a challenge as existing mixer solutions often require external components, such as baluns and matching components that add complexity to the design.

Operating in the 2300 to 2900 MHz frequency range, the single-channel ADL5353 and the dual-channel ADL5354 include an RF balun, LO (local oscillator) switch for dual LO frequency applications, LO driver and an integrated IF (intermediate frequency) amplifier. The balun integration enables the RF signal to be driven single-ended, while the integrated IF amplifier provides the necessary gain, thereby eliminating the need for an external gain stage.

Both devices provide excellent IP3 and noise figure performance resulting in extended spurious-free dynamic range. They also offer excellent noise figure under blocker signal performance. These characteristics enable the mixer to be used in applications where the receiver is operating in the presence of large interfering signals. The 5 V ADL5353 and ADL5354 can also be operated on a 3,3 V supply voltage for power-conscious applications.

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