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BAW Resonator Technology, comparison with crystal oscillators (as used in CC2652RB SimpleLink)

Nicholas C Lee
Prodigy 225 points
Other Parts Discussed in Thread: LMK05318

How does a Texas Instruments BAW oscillator compare with a typical SMD crystal oscillator for:

1) ppm stability?

2) phase noise?

3) Resistance to damage by ultrasonic cleaning processes?

4) Frequency stability, when in use, in a high-vibration environment? (e.g. in a drone, engine-management unit, avionics use etc)

  • 0
    TI__Mastermind 24205 points
    Hi Nicholas,

    1) ppm stability?
    We are looking to target +/-50 ppm and +/-25 ppm products utilizing BAW in the near future. For CC2625RB utilizing the BAW resonator as reference, the 48 MHz frequency has a stability of +/- 40 ppm (Page 20: www.ti.com/.../cc2652rb.pdf)

    2) phase noise?
    Phase Noise performance from the BAW resonator when utilized as a VCO (example LMK05318), allows one to achieve < 50fs (@312.5 MHz) Integrated RMS Jitter (12 kHz - 20 MHz). Performance/Power tradeoff will depend on the application use case.

    3) Resistance to damage by ultrasonic cleaning processes?
    This is again a function of the how it is utilized in the application (device package and other stresses). When used as a VCO in a device like LMK05318, the loop bandwidth of the Analog PLL can be tuned to minimize the impact of vibration (25-40 kHz in the case of most ultrasonic cleaners) on the performance of the output. For CC2625RB utilizing the BAW as a reference, please post a query on the relevant E2E forum and someone from the product line will be able to better support you.

    4) Frequency stability, when in use, in a high-vibration environment? (e.g. in a drone, engine-management unit, avionics use etc)
    We have done shock and vibration testing to MIL-STD-883 standard. In general, the vibration and shock performance of the BAW resonator is superior to Quartz crystals. For information specific to CC2625RB, please post a query on the relevant E2E forum and someone from the product line will be able to better support you.

    Best Regards