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OPT3101: OPT3101 amplitude information

Part Number: OPT3101

Hi,

I use the OPT3101 on a custom board.

If I initialize the sensor and read ot the amplitude value (reg 9h[15:0] I get values from around 700 to up to the saturation value of 65535, depending on where I point to. That makes perfectly sense to me.

After calibration of external crosstalk, however, the amplitude readout minimum is 40 but saturates at 1023. Pointing to a high reflective surface the amplitude value can also take on 65535. It seems to me that the value in reg 9[15:0] is scaled or processsed in some way, depending on settings after calibration.  Could you explain this amplitude value is calculated internally in OPT3101?

Many Thanks!

Markus