RF mixer delivers flexibility in frequency planning, low power consumption, and a small footprint - Embedded.com

RF mixer delivers flexibility in frequency planning, low power consumption, and a small footprint

Analog Devices claims that its latest RF mixer offers industry-leading linearity over a frequency range up to 3 GHz for both up- and down-conversion radios. Aimed at wireless applications, the RF mixer stage converts signals from the actual radio frequency to the IF (intermediate frequency) where filtering is applied to select a single received channel or improve signal quality for cleaner radio transmissions. Typically, radio designers must make trade-offs when selecting an RF mixer among the necessary performance, flexible IF selection, cost, and size. By delivering high linearity, low power consumption, and high integration in a 3- by 2-mm package, the ADL5350 RF mixer reduces board space and cost with no compromises. It operates from a 3- to 5-V supply.

The ADL5350 provides high input linearity (as measured by the input third-order intercept or IIP3) of 26 dBm, a typical conversion loss of 6.5 dB at 900 MHz, and a noise figure below 8 dB. The high input linearity of the ADL5350 suits it for 2G and 3G cellular base station designs that require high sensitivity and blocker immunity. The 3-GHz broadband device can be used for up- and down-conversion applications, thus allowing the part to be used for both receiver and transmitter applications. Unlike conventional passive mixers that require a high LO drive level, the ADL5350 has an on-chip LO buffer amplifier, eliminating the need for an external LO driver.

The ADL5350 RF mixer is priced at $2.35 in 1000-piece quantities. An evaluation board is also available. For more information, visit www.analog.com/ADL5350.

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