Miniature TCXO models suited to GPS applications

13th October 2016
Alice Matthews

The latest TCXO design launched by IQD delivers two models housed in miniature 1.6x1.2x0.45mm hermetically sealed ceramic packages that are amongst the smallest available on the market. The IQXT-350 series is a standard TCXO (Temperature Compensated Crystal Oscillator).

The IQXT-351 series version offers full VCTCXO (Voltage Controlled Temperature Compensated Crystal Oscillator) functionality.

Both models are initially available in four standard frequencies; 19.2, 26.0, 38.4 and 52.0MHz, all with a frequency tolerance of ±1.5ppm and frequency stability of ±0.5ppm. Both series operates at 1.8V with a maximum current consumption of 1.7mA and a clipped sinewave output with 10kΩ//10pF drive capability.

The 26.0 and 52.0MHz parts are available with an operating temperature range of -40° to 85°C whilst the 19.2 and 38.4MHz operate over -30°C to 85°C. Start-up time from the power mode is only 2ms max whilst the IQXT-351 (VCTCXO) series has a pullability of between ±8ppm to ±13ppm. Harmonic distortion is -5.0dBc max and typical phase noise is -135dBc/Hz at 1kHz with ageing at ±1ppm max per year.

The low power and miniature footprint of both designs makes these new models ideal for GPS, IoT, Wearables, Wi-Max and Wireless Communications applications.

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