Dear Mr. Rob
Thank you for your suggestion.
Added 10uF capacitor (ceramic) and checked.
Then it calmed down!
Great !
But the power line noise still remain.
PSRR is usually 0.1°C/V @ Ta = 25°C.
In 1uF capacitor case , peak noise level is about 0.3V, so it should be no problem.
In 10uF case ,noise is not so much changed.
I think it need to reduce the low frequency noise.
correct?
ADT75's internal clk is 350KHz?
temperature conversion time is 60ms.
To reduce under 16Hz noise is important ?
Could I have a comment?
Regards
moto