Yes its definitely necessary for the teensy to process the was information.
That one should be ok. I used this one
16-Bit ADS1115 I2C 4-Channel… https://www.amazon.co.uk/dp/B07QQTGC3W?ref=ppx_pop_mob_ap_share
You will also need the 1k resistor added to the through holes by the side of it to make it work
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