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One-Wire Ambient Temperature Sensor - MAX31820
[47231]
CHF 2.49

Product retired

This product has been retired from our catalogue and is not available for odering anymore. The page is being kept for those looking for datasheets, sample code or other information.

 

Stock: 0

The MAX31820 ambient temperature sensor provides 9-bit to 12-bit Celsius temperature measurements with ±0.5°C accuracy over a +10°C to +45°C temperature range. Over its entire -55°C to +125°C operating range, the device has ±2.0°C accuracy.

The device communicates over a one-wire bus that, by definition, requires only one data line (and ground) for communication with a central microprocessor. In addition, the device can derive power directly from the data line, eliminating the need for an external power supply.

Each MAX31820 has a unique 64-bit serial code, which allows multiple MAX31820 devices to function on the same one-wire bus. Therefore, it is simple to use one microprocessor to control many devices distributed over a large area.

Features:

  • Unique one-wire interface requires only one port pin for communication
  • Each device has a unique 64-bit serial code stored in onboard ROM
  • Multidrop capability simplifies distributed temperature-sensing applications
  • Requires no external components
  • Can be powered from data line: 3.0V to 3.7V power-supply range
  • Measures temperatures from -55°C to +125°C (-67°F to +257°F)
  • ±0.5°C accuracy from +10°C to +45°C
  • Thermometer resolution is user-selectable from 9 bits to 12 bits
  • Converts temperature to 12-bit digital word in 750ms (Max)
  • User-definable nonvolatile (NV) alarm settings
  • Alarm search command identifies and addresses devices whose temperature is outside programmed limits (Temperature Alarm Condition)
  • Available in 3-pin TO-92 package
  • Software compatible with the DS1822 and DS18B20

Documents:

This product was added to our catalog on Wednesday 21 December, 2016.
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