LTC2983 for custom diode

I am using the LTC2983  to get temperature of a specific device designed by another team.

Basically they implemented a kind of diode. They ask me to provide a 10[uA] excitation current and to measure the voltage at the diode.
(I have a specific formula to convert this voltage to temperature.)

For this purpose, I implemented a LTC2983 and connect one of the channel of the LTC2983 to the diode.

I am wondering what would be the best configuration for the LTC2983.

Indeed I was thinking to configure it with "Direct ADC Measurements" but it seems (according to the datasheet) I cannot program an excitation current source in this mode.

May I ask you an advice? What would you recommend?