I designed my own PCB with an ADS1115 chip on it. I didnt connected the ADDR pin to GND and the ALERT pin to VDD, because I thought, that it wasnt going to be needed. When I wasnt able to detect it with the Raspi, I "hacked" the connection.
The ADDR pin was on the outside, and I connect it with a resistor to the GND side of the capacitor.
The ALERT pin, wich is on the inside, got connected via a very thin wire to a resistor, that is connected to a ferrite bead on the VDD line.
I measured 2.6V between GND and ALERT, VDD -> GND I got 3.3V.
What is wrong there?
P.S.: The resistior have an resistance of 10KΩ
Here is an picture of my schematic:
And here are two pictures of the PCB: