Digital Temperature Sensor Enables Multipoint Monitoring
Feb 21, 2007 3:37 PM
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Jones states that the measured temperature is actually the temperature of the die. The temperature is respectively sensed and digitized from the differential base-emitter voltage output of a matched NPN-transistor pair and a first-order sigma-delta ADC. Conversion resolution is user programmable within a range of 9-bits to 12-bits.
Jones also states that temperature monitoring in rack- or chassis-based equipment was a key application that drove the development of the device. In such equipment, such as wireless base stations or enterprise servers, it is often necessary to monitor the temperature at multiple locations. For example, multipoint temperature monitoring is a critical capability in smart cooling for data centers.
The DS28EA00 is available in an 8-pin microSOP package. Prices start at $2.27 for 1000 pieces.
Figure: The DS28EA00 digital temperature sensor includes a daisy-chain interface that allows multipoint temperature monitoring from a single host.
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