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Digital Drop-In Temperature Sensor
August 2008
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A series of precision digital-output temperature sensors, operating from –55° to 125°C, is suited for low-power applications in laptops, servers, some set-top boxes, medical equipment, industrial controllers, and LCD backlighting. The cost-competitive STxx75 devices are software-compatible drop-in replacements for industry-standard LM75, DS75, and TCN75A parts. The digital sensors, in standard 8-lead TSSOP and SO-8 packages, are intended for use in any control application where a processor with an I2C bus/SMBus needs to take action based on an accurate digital reading of the local temperature, or where an alarm or interrupt is required when a preset temperature level is reached. They use a band-gap temperature sensor, with a programmable 9- to 12-bit sigma-delta analog-to-digital convertor to digitize the temperature reading to a resolution of up to 0.0625°C.



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