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 (typical) at +25°C
- ±1°C (maximum) from -10°C to +85°C
- ±2°C (maximum) from -10°C to +125°C
- ±3°C (maximum) from -55°C to +125°C
- User-selectable resolution: 9-12 bit
- Operating voltage range: 2.7 V to 5.5 V
- 2-wire interface: I2C/SMBus compatible
- Operating current: 200 μA (typical)
- Shutdown current: 1 μA (maximum)
- 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