Internal temperature sensor maximum sample rate specification for the stm32l4 series?

The ADC counts returned by the internal temperature sensor appear to depend on the sampling frequency.  In other words, it looks like the temperature sensor can be read too fast (with or without oversampling) to give incorrect temperature readings.   Is there a specification somewhere on the maximum sampling frequency you can use with the internal temperature sensor?   I'm having trouble finding it.

Thank you,

--b