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The LTC5566 dual mixer has a 300MHz to 6GHz input frequency range, and so covers the emerging 3.6GHz and 4.5GHz 5G mobile bands, as well as the established 4G bands.
![LTC 5566](http://static.electronicsweekly.com/wp-content/uploads/2017/02/03152126/37393-300x230.jpg)
LTC 5566
It supports bandwidths up to 400MHz to meet the needs of the growing sub-6GHz 5G wireless access equipment.
The mixer’s dynamic range is specified at an input P1dB of +11.5dBm and input IP3 of +25.5dBm at 3.6GHz.
At higher frequencies, up to 5.8GHz, its IIP3 sustains more than +24dBm.
According to the supplier, the device’s integrated IF amplifier boosts the overall power conversion gain to a maximum of 12dB.
The gain of each channel is independently programmed in precise 0.5dB steps via the on-chip SPI bus. So, with each channel driving an A/D converter, the fine gain control provides a simple means to balance the gain of the two channels and calibrate to the optimum level with minimal external components.
The mixer has a double-balanced mixer core which optimises conversion loss and provides the port-to-port isolation. Each mixer input includes an integrated wideband balun transformer, allowing a simple single-ended interface.
Using the SPI or parallel pins, the mixer inputs can be digitally tuned for optimum return loss over several wide, overlapping frequency bands, ranging from 1.3GHz to 5.3GHz.
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