IQD Introduces Ultra Miniature TCXO's for IoT and Wearables

IQD has launched two new TCXO modules, housed in ultra-miniature 1.6 x 1.2 x 0.45 mm 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) whilst the IQXT-351 series version offers full VCTCXO (Voltage Controlled Temperature Compensated Crystal Oscillator) functionality.

Both models are currently available in four standard frequencies; 19.2, 26, 38.4 and 52 MHz, all with a frequency tolerance of ±1.5 ppm and frequency stability of ±0.5 ppm. They operate at 1.8 V with a maximum current consumption of only 1.7 mA and a clipped sinewave output with 10 kΩ//10pF drive capability. The 26 & 52 MHz parts are available with an operating temperature range of -40 to +85 degrees C whilst the 19.2 & 38.4 MHz operate over -30 to +85 degrees C. Start-up time from the power mode is only 2 ms max whilst the IQXT-351 (VCTCXO) series has a pullability of between ±8 ppm to ±13 ppm. Harmonic distortion is - 5.0 dBc max and typical phase noise is -135 dBc/Hz at 1 kHz with ageing at ±1 ppm max per year.

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