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DS18B20(3)                   One-Wire File System                   DS18B20(3)


NAME

       DS18B20
              Programmable Resolution 1-Wire Digital Thermometer

       MAX31820
              Ambient Temperature Sensor


SYNOPSIS

       Thermometer.

       28 [.]XXXXXXXXXXXX[XX][/[

       See the file man3/temperatures_mini.3so.

       die | power | temphigh | templow | errata/die | errata/trim |
       errata/trimblanket | errata/trimvalid |

       See the file man3/standard_mini.3so.

       ]]


FAMILY CODE

       28


SPECIAL PROPERTIES

   power
       read-only,yes-no
       Is the chip powered externally (=1) or from the parasitically from the
       data bus (=0)?

   temperature
       read-only, floating point
       Measured temperature with 12 bit resolution.

   temperature9 temperature10 temperature11 temperature12
       read-only, floating point Measured temperature at 9 to 12 bit
       resolution. There is a tradeoff of time versus accuracy in the
       temperature measurement.

   fasttemp
       read-only, floating point
       Equivalent to temperature9

       See the file man3/temperature_threshold.3so.

       See the file man3/temperature_errata.3so.


STANDARD PROPERTIES

       See the file man3/standard.3so.


DESCRIPTION

       See the file man3/description.3so.

   DS18B20
       The DS18B20 (3) is one of several available 1-wire temperature sensors.
       It is the replacement for the DS18S20 (3) Alternatives are DS1822 (3)
       as well as temperature/voltage measurements in the DS2436 (3) and
       DS2438 (3).  For truly versatile temperature measurements, see the
       protean DS1921 (3) Thermachron (3).

       The MAX31820 is functionally identical to the DS18B20 except for it's
       voltage requirements.
       The DS18B20 (3) can select between 4 resolutions. In general, high
       resolution is the best choice unless your application is truly time-
       constrained.


ADDRESSING

       See the file man3/addressing.3so.


DATASHEET

       http://pdfserv.maxim-ic.com/en/ds/DS18B20.pdf


SEE ALSO

       See the file man3/seealso.3so.


AVAILABILITY

       http://www.owfs.org


AUTHOR

       Paul Alfille (paul.alfille@gmail.com)

OWFS Manpage                         2003                           DS18B20(3)

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