DS18B20(3)

NAME

DS18B20
    - Programmable Resolution 1-Wire Digital Thermometer

MAX31820
    - Ambient Temperature Sensor

SYNOPSIS
Thermometer.

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

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.

  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

  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

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

SEE ALSO

AVAILABILITY
http://www.owfs.org

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