DS1825U+T&R

MAXIM INTEGRATED PRODUCTS  DS1825U+T&R  温度传感器芯片, 数字式, ± 2°C, -55 °C, 125 °C, µMAX, 8 引脚

The DS1825U+T&R is a programmable resolution 1-wire digital thermometer with 4bit ID in 8 pin µMAX package. It provides 9bit to 12bit centigrade temperature measurements and has an alarm function with NV user programmable upper and lower trigger points. The DS1825 communicates over 1-wire bus that by definition requires only one data line and ground for communication with central microprocessor. It has an operating temperature range of -55°C to +125°C 2°C accuracy and is accurate to ±0.5°C over the range of -10°C to +85°C. In addition, the DS1825 can derive power directly from the data line parasite power by eliminating the need for an external power supply. Each DS1825 has a unique 64bit serial code which allows multiple DS1825 devices to function on same 1-wire bus thus it is simple to use one microprocessor to control many DS1825s distributed over a large area.

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Supply voltage range from 3V to 3.7V

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Unique 1-wire interface requires only one port pin for communication

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Multidrop capability simplifies distributed temperature sensing applications

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4 pin programmable bits to uniquely identify up to 16 sensor locations on bus

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Requires no external components

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Converts temperature to 12bit digital word in 750ms maximum

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User definable NV alarm settings

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Alarm search command identifies & addresses devices whose temperature is outside programmed limits

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Standby current of 500nA, active current of 0.65mA and sink current of 4mA

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2ms NV write cycle time, 50K EEPROM writes and 10 years EEPROM data retention -55°C to +55°C