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CC2500: Sine wave to XOSC input Level

user5163865
Genius 3640 points
Part Number: CC2500

Hi,

We received an inquiry from one of our customers.
I can't find an answer from D/S, so please let me know.

1. Regarding sine wave input, it is described as "peak-to-peak amplitude of up to 1V." What is the minimum peak-to-peak amplitude of a sine wave input?
    I am considering a clipped sine wave as the sine wave input.
   The minimum value of the output voltage of the clipped sine wave is 0.8Vp-p, and the minimum value of the input voltage level of XOSC_Q1 after passing
   through the series capacitor is ±0.4Vp-p. Is this OK as an input clock?

2. In the case of sine wave input, is there a regulation for the absolute maximum rating of XOSC_Q1?

3. What problems will occur if the sine wave input exceeds the maximum peak-to-peak amplitude of 1V?

Best regards,
Hiroshi

  • 0
    TI__Expert 4870 points

    Hi Hiroshi,

    1. Based on the datasheet, the minimum voltage required is 0.4Vp-p. See image below.

    2. Yes, by design the crystal oscillator amplitude is regulated.

    3. The exact failure mode is not known. The pins/gate could fail or the crystal could fail. We just know there's a high chance of failure if it exceeds 1Vp-p.

    Best regards,

    Bun

  • 0 in reply to Bun Kuch
    Genius 3640 points

    Hi Bun,

    Thank you for your support.
    If I have any further questions, I will post them and mark this thread as resolved.

    Best regards,

    Hiroshi