On-chip temperature sensor saves a BOM line
The integrated temperature sensor reports the die temperature directly through the ADC. If your system needs to monitor ambient temperature for fan control, thermal derating, or compensation of external sensors, this feature eliminates a separate thermistor or RTD and its signal-conditioning circuit. The sensor reading is available on a dedicated input channel through the same SPI interface.
Industrial temperature rating and package
The -40°C to 85°C operating range covers outdoor telecom cabinets, motor-drive enclosures, and factory-floor automation panels. The 28-TQFN (5x5 mm) with exposed pad conducts heat to the PCB ground plane — a solid thermal via pattern under the pad keeps the die temperature stable during continuous conversion at 300k samples per second.
Active production — no LTB risk for new designs
The MAX1231BETI+ carries an Active lifecycle status and is ROHS3 compliant.