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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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