Microwave Journal
www.microwavejournal.com/articles/30814-iqds-ultra-miniature-high-frequency-fundamental-quartz-crystals
IDQ

IQD's Ultra Miniature High Frequency Fundamental Quartz Crystals

July 31, 2018

IQD has launched a range of quartz crystals which can operate in the fundamental mode up to 200 MHz. The quartz crystals are housed in an hermetically sealed 2.5 mm x 2.0 mm x 0.6 mm (IQXC-152) and 2.0 x 1.6 x 0.5 mm (IQXC-153) ceramic four pad package, two of the pads are grounded to the metal lid to improve the EMI. In the higher frequency range, 70 to 200 MHz, the frequency tolerance can be as low as ±30 ppm and the stability is also ±30 ppm over the full industrial operating temperature range of -40oC to +85oC with the capacitance load ranging from 8 to 30 pF.

The IQXC-152 and IQXC-153 enables design engineers to use higher frequencies in the fundamental mode which eliminates the need to use a PLL or a tank circuit picking up the third, fifth or seventh harmonics. A higher starting frequency can also be used when looking to generate for example 2.4 GHz which cuts down on the jitter/phase noise in the circuit.