|
DS1775 Datasheet, PDF (3/13 Pages) Dallas Semiconductor – SOT23-5 Digital Thermometer and Thermostat | |||
|
◁ |
DS1775
the O.S. output will become active only after the measured temperature exceeds the respective trippoint a
consecutive number of times; the number of consecutive conversions beyond the limit to generate an O.S.
is programmable. The powerâup state of the DS1775 is in the comparator mode with a single fault
generating an active O.S.
Digital data is written to/read from the DS1775 via a 2âwire interface, and all communication is MSb
first.
DS1775 FUNCTIONAL BLOCK DIAGRAM Figure 1
OPERATIONâMeasuring Temperature
The core of DS1775 functionality is its directâtoâdigital temperature sensor. The DS1775 measures
temperature through the use of an onâchip temperature measurement technique with an operating range
from â55°C to +125°C. Temperature conversions are initiated upon powerâup, and the most recent result
is stored in the thermometer register. Conversions are performed continuously unless the user intervenes
by altering the configuration register to put the DS1775 into a shutdown mode. Regardless of the mode
used, the digital temperature can be retrieved from the temperature register by setting the pointer to that
location (00h, powerâup default). The DS1775 powerâup default has the sensor automatically performing
9âbit conversions continuously. Details on how to change the settings after powerâup are contained in the
âOPERATIONâProgrammingâ section.
3 of 13
102299
|
▷ |