DAC3484: PLL temperature range

Sir,

I would like to use DAC3484 internal PLL as multiplier to generate DAC clock.

I don't find in DAC3484 data sheet the allowable temperature range for the PLL not to be retune.

Could you please confirm if the PLL is lock at -40°C, it can stay in lock at +85°C without retuning the VCO?

There is a temperature sensor inside chip. Could you please tell me what is his main function?

Regards,

Alain.