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Space-saving sub-GHz LTCC filter supports TI CC112x transceiver series

Space-saving sub-GHz LTCC filter supports TI CC112x transceiver series

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By eeNews Europe



Claimed to be the world’s smallest filter available, measuring 2.00 x 1.25 x 0.7 mm the miniature LTCC (low temperature co-fired ceramic) surface mounted filter takes up much less board space than a discrete design and has been approved by Texas Instruments for use with their CC112x transceivers.

The compact filter frees up board space for additional features. The LFD21868MMF has a nominal operating frequency centered on 891.50 MHz +/- 23.50 MHz and can accommodate up to 500 mW transmit power output. This tiny space saving device ensures board space, BOM count and engineering effort is kept to a minimum. Compared with a traditional inductor and capacitor design, the filter module replaces more than 10 discrete components.

Insertion loss is typically better than 1.73 dB transmit and 2.67 dB receive. The antenna port matches to a nominal impedance of 50 Ohm.

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