CODELOADER: Guidance on LMX2592 8 GHz Configuration with VCO Doubler for PA Input on TICS pro

Part Number: CODELOADER
Other Parts Discussed in Thread: LMX2592, PLLATINUMSIM-SW

Dear TI Technical Support,

I am configuring the LMX2592 PLL to provide an 8 GHz output that will serve as the input to a Quervo PA operating at 8 GHz.

Here is my current setup in TICS Pro:

• Reference input (Fosc): 100 MHz

• Prescaler: 2

• N Divider: 40

• FracN: 0 (integer mode)

• VCO Output: 4000 MHz

• VCO Doubler: enabled → effective output = 8000 MHz

• Output MUX: set to VCO

• RFoutA/B: showing 8 GHz

• Charge pump current: 0.468 mA × gain multiplier = 0.9375 mA effective

• Calibration: FCAL_EN enabled

My questions are:

1. With the VCO doubler enabled, is this the correct and recommended way to achieve 8 GHz output for driving a Quervo PA?

2. Beyond enabling the doubler, should I adjust other parameters such as phase detector frequency, charge pump current, or loop filter bandwidth to optimize performance at 8 GHz?

3. Are there specific spur reduction or calibration settings you recommend for stable lock and low phase noise at this frequency?

4. For PA drive, is there any guidance on output power level settings or distribution options that I should consider to ensure proper interfacing with the Quervo PA?

I would appreciate your confirmation on whether this configuration is valid, and any recommendations for fine‑tuning the parameters to ensure reliable operation at 8 GHz with the PA.

Best regards,

Chaithanya