MCP9800/1/2/3 High-Accuracy Temperature Sensor Fam

By Microchip Technology 60

MCP9800/1/2/3 High-Accuracy Temperature Sensor Fam

Microchip Technology's MCP9800 / 1 / 2 / 3 family of digital temperature sensors converts temperatures between -55°C and +125°C to a digital word. They provide an accuracy of ±1°C (maximum) from -10°C to +85°C.

The MCP9800 / 1 / 2 / 3 family offers user-programmable registers to provide flexibility for temperature-sensing applications. The register settings allow user-selectable, 9-bit to 12-bit temperature-measurement resolution, configuration of the power-saving shutdown and one-shot (single conversion on command while in shutdown) modes, and the specification of both temperature-alert output and hysteresis limits. When the temperature changes beyond the specified limits, the MCP9800 / 1 / 2 / 3 outputs an alert signal. The user has the option of setting the alert output signal polarity as an active-low or -high comparator output for thermostat operation, or as temperature-event interrupt output for microprocessor-based systems.

This sensor has an industry standard 2-wire, I2C / SMBus compatible serial interface, allowing up to eight devices to be controlled in a single serial bus. These features make the MCP9800 / 1 / 2 / 3 ideal for sophisticated multi-zone temperature-monitoring applications.

  • Temperature-to-digital converter
  • Accuracy with 12-bit resolution
    • ±0.5°C (typ.) at +25°C
    • ±1°C (max.) from -10°C to +85°C
    • ±2°C (max.) from -10°C to +125°C
    • ±3°C (max.) from -55°C to +125°C
  • User-selectable resolution: 9- and -12 bit
  • Operating voltage range: 2.7 V to 5.5 V
  • 2-wire interface: I2C / SMBus compatible
  • Operating current: 200 µA (typ.)
  • Shutdown current: 1 µA (max.)
  • Power-saving one-shot temperature measurement
  • Available packages: SOT-23-5, MSOP-8, and SOIC-8
  • Personal computers and servers
  • Hard disk drives and other PC peripherals
  • Entertainment systems
  • Office equipment
  • Data communication equipment
  • Mobile phones
  • General-purpose temperature monitoring