Accuracy and the thermal decision threshold
The TMP175AQDRQ1: A ±1°C window at 105°C means the actual die temperature could be 104°C or 106°C; if the system must not exceed 105°C, the software trip point needs to be set at 104°C (or lower) to stay inside the guard band. The 12-bit resolution gives 0.0625°C per LSB — finer than the ±1°C accuracy, so the digital readout will show more digits than the sensor can guarantee. The extra bits help with trend detection (rate of temperature rise) but not with absolute accuracy.
Bus interface and addressability
Communication is over I²C/SMBus — two wires for clock and data, with the sensor acting as a slave. Multiple TMP175 devices can share the same bus; each has a configurable address via the ADD0 pin, so up to 27 devices can be addressed on one bus without an I²C multiplexer. The I²C interface runs on the same 2.7-5.5 V supply rail — no separate bus voltage translator is needed when the master controller runs at the same voltage.
Compliance and production status
RoHS3 compliant (EU 2015/863), which covers the current restricted substances including the four phthalates. No REACH or UL documentation is carried in the record.