I2C-bus Temp Sensors target Demanding Logging Applications
A new CMOS I2C-bus temperature sensor, PCT2075 is offered by NXP Semiconductors N.V. in a number of different packages to fit most any design requirement. These devices are the industry's first Fm+ (Fast Mode Plus) temperature sensors operating at 1 MHz data speed. These temperature sensors claim an accuracy of ±1 degree C over a range of -25 to +100 degrees C making them suited for more demanding temperature logging applications. The PCT2075 is also pin and function compatible with the industry standard LM75, permitting designers to easily upgrade existing systems with no printed circuit board or software changes.
With extensive package options and features, our devices exceed industry standards for temperature sensors, allowing system designers to optimize their designs and shrink the size of the application. These temperature sensors are available in a variety of packages, ranging from the industry standard SO8 package to the smaller TSSOP8 and a leadless 2 x 3 mm QFN package. The PCT2075 is also available in the smallest leaded package, a TSOP6 that is only 2.9 x 1.5 mm for space constrained designs.
The PCT2075 incorporates a number of additional features over the industry standards temperature sensor devices: 11-bit ADC with a temperature resolution of 0.125 degrees C which provides more temperature resolution than industry standard temperature sensors; Faster I2C-bus speed meeting the Fm+ specification of 1 MHz clock speed allowing more data transfers on the I2C-bus; Additional I2C addresses to ensure no conflict, even in the most complex system; Timeout feature to ensure no “bus hang†and increase the reliability of the I2C-bus; and factory-programmed default limits for specialty thermostat applications with no need for a control microprocessor.
