DS1822(3)

NAME
DS1822 - Econo 1-Wire Digital Thermometer

SYNOPSIS
Thermometer.

22 [.]XXXXXXXXXXXX[XX][/[ | latesttemp | die | power | temphigh | templow | tempres | trim | trimblanket | trimvalid | ]]

FAMILY CODE

22

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.

  latesttemp
read-only, floating point
Measured temperature at 9 to 12 bit resolution, depending on the resolution of the latest conversion on this chip. Reading this node will never trigger a temperature conversion. Intended for use in conjunction with /simultaneous/temperature.

  fasttemp
read-only, floating point
Equivalent to temperature9

STANDARD PROPERTIES

DESCRIPTION

  DS1822
The DS1822 (3) is one of several available 1-wire temperature sensors. Alternatives are the DS18S20 (3), DS18B20 (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).

Although the DS1822 (3) can select between 4 resolutions, this program simplifies the interface by only implementing the fastest/roughest and slowest/best.

ADDRESSING

DATASHEET
http://pdfserv.maxim-ic.com/en/ds/DS1822.pdf

SEE ALSO

AVAILABILITY
http://www.owfs.org

AUTHOR
Paul Alfille (paul.alfille@gmail.com)