OPT4001-Q1: OPT4001-Q1 and thermal pad

Part Number: OPT4001-Q1
Other Parts Discussed in Thread: OPT4041

Tool/software:

Hi TI,

Should/could I connect thermal pad of OPT4001-Q1 ambient light sensor in USON-6 package?
I mean, can thermal pad be connected to GND or it must remain unconnected?
I found no remarks on this topic in datasheet. It only states that thermal pad must be soldered.

Thanks,

Thomas