Single-Channel Digital Output Temperature Solutions for HVAC

Digital Temperature sensors such as the MCP9808 provide greater design flexibility and simplicity for HVAC thermostat applications. Unlike resistance temperature detectors, these sensors do not require instrumentation circuit and circuit-calibration routines, while they do provide low power and superior accuracy. The MCP9808 provides a factory-calibrated maximum accuracy of ±0.5°C and programmable features such as a temperature window monitor output. If temperature exceeds the upper and lower temperature window plus hysteresis, the alert output asserts as an interrupt for microcontrollers or as a comparator for thermostat applications.