Embedded World 2014: MCXO delivers ±50ppb stability from tiny package

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Unveiled for the first time at Embedded World, IQD's new IQMT-100 series MCXO is designed to offer customers OCXO performance from a standard clock oscillator sized package.

The module enables a frequency stability of ±50ppb over the full industrial operating temperature range of –40 to 85°C, whilst maintaining a typical short term stability of 2E-10/s. The IQMT-100 is housed in an industry standard sized ceramic package measuring just 7 x 5mm with both 8 and 10 pad options available over a frequency range of 10 to 50MHz. A range of standard frequencies have already been developed, including 10, 12.8, 16.320,16.3840, 19.2, 19.44, 2, 25, 26, 30.720 and 50MHz. Output compatibility can be specified as either Clipped Sine or HCMOS with 15pF load along with 3, 3.3 and 5V supply voltages. A voltage control option is available to control the frequency pulling to compensate for crystal ageing and varying circuit conditions with choices of either ±5 to ±10ppm or ±10 to ±15ppm. Ageing per day is 20ppb although 10ppb can be offered for some specification combinations. Similarly, standard ageing over one year is 1ppm although 0.5ppm can be offered for certain frequencies. Typical phase noise performance is 145dBC/Hz at 100kHz.