Microchip | MCP9804-E/MS

In many systems, temperature control is fundamental. There are a number of passive and active temperature sensors that can be used to measure system temperature, including: thermocouple, resistive temperature detector, thermistor and silicon temperature sensors. These sensors provide temperature feedback to the system controller to make decisions such as, over-temperature shutdown, turn-on/off cooling fan, temperature compensation or general purpose temperature monitor.

Microchip offers a broad portfolio of thermal management products, including Logic Output, Voltage Output and Serial Output Temperature Sensors. These products allow the system designer to implement the device that best meets their application requirements. Key features include high accuracy, low power, extended temperature range and small packages. In addition, Microchip’s linear products can be used to support Thermocouple, RTD and Thermistor applications.

The MCP9804 digital temperature sensor converts temperatures between -40°C and +125°C to a digital word with ±1°C (max.) accuracy. The MCP9804 comes with user-programmable registers that provide flexibility for temperature sensing applications. The registers allow user-selectable settings such as Shutdown or low-power modes and the specification of temperature Event and Critical output boundaries. When the temperature changes beyond the specified boundary limits, the MCP9804 outputs an Event signal. The user has the option of setting the event output signal polarity as an active-low or active-high comparator output for thermostat operation, or as temperature event interrupt output for microprocessor-based systems. The event output can also be configured as a Critical temperature output. This sensor has an industry standard 2-wire, SMBus and Standard I2C™Compatible compatible (100kHz/400kHz bus clock) serial interface, allowing up to eight sensors to be controlled in a single serial bus. These features make the MCP9804 ideal for sophisticated multi-zone temperature- monitoring applications.

Features

Temperature-to-Digital Converter

·  Accuracy:±0.25°C (typ.) from -40°C to +125°C 

·  Accuracy:±1°C (max.) from -40°C to +125°C 

·  Operating Voltage Range: 2.7V to 5.5V 

·  2-wire Interface: I2C/SMBus Compatible 

·  Operating Current: 200 µA (typ.) 

·  Shutdown Current: 2 µA (max.) 

·  Available Packages: MSOP-8, 2x3 DFN8

MCP9804-E/MS is a 2.7– 5.5V, 200 µA, -40°C and +125°C range Digital Temperature Sensor. MCP9804-E/MS is available in 3 X 3 mm,  8 lead MSOP package.