Digital temperature sensor for harsh environments
The Maxim Integrated MAX6630MTT+T is a digital local temperature sensor that reports temperature over an SPI interface with 12-bit resolution. Its ±0.8°C accuracy at 25°C is typical for precision monitoring; the wider tolerance at the temperature extremes (-5°C at -55°C, 6.5°C at 125°C) is the real constraint a designer must budget for when the sensor lives inside a hot enclosure or cold start. The supply voltage range of 3V to 5.5V lets it run directly off a 3.3V or 5V rail without a separate LDO, which simplifies the power tree in mixed-voltage designs. A shutdown mode is available to cut quiescent current when the system enters a low-power sleep state — useful for battery-backed telemetry or energy-harvesting sensor nodes.
Temperature range and package — fit for harsh spots
The -55°C to +150°C operating range covers automotive under-hood, industrial ovens, and downhole tools. The local sensing range is -55°C to 125°C, which matches the typical board-level temperature span in those environments. The 6-TDFN (3x3 mm) exposed-pad package helps conduct heat away from the die into the PCB copper pour, improving thermal response time in forced-air or conductive-cooled assemblies.
Lifecycle and sourcing
The MAX6630MTT+T carries an active product status with ROHS3 compliance, so there is no last-time-buy risk for new designs.