Active production — 12-bit local temp sensor with SPI interface
The MAX6631MTT+T is an active-production 12-bit digital temperature sensor from Analog Devices, sensing local die temperature with a ±0.8°C accuracy at 25°C and communicating over an SPI bus. Its supply range spans 3V to 5.5V, and the operating temperature covers -55°C to +150°C, with the sensing range rated to +125°C — wide enough for industrial and automotive-adjacent thermal monitoring.
Package and supply-chain posture
Housed in a 6-WDFN exposed pad package (6-TDFN 3x3 mm), supplied on Tape & Reel (TR) or Cut Tape (CT) — the reel format suits automated pick-and-place for volume builds.
Accuracy over temperature and shutdown mode
Accuracy is specified at ±0.8°C (max) at 25°C, widening to -5°C / +6.5°C at the 150°C test condition — the error band is tightest near room temperature and opens at the extremes, a consideration for high-temperature fault thresholds. A shutdown mode drops quiescent current when the sensor is idle, useful for battery-powered or duty-cycled systems where the SPI bus is shared and the sensor only wakes for periodic reads.