參數(shù)資料
型號(hào)： STCN75DS2E
廠商： 意法半導(dǎo)體
元件分類： 溫度/濕度傳感器
英文描述： Digital temperature sensor and thermal watchdog
中文描述： 數(shù)字溫度傳感器和熱看門狗
文件頁(yè)數(shù)： 10/35頁(yè)
文件大?。?/td> 194K
代理商： STCN75DS2E
Operation
STCN75
10/35
2
Operation
After each temperature measurement and analog-to-digital conversion, the STCN75 stores
the temperature as a 16-bit two’s complement number (see
Table 5: Register pointers
selection summary on page 16
) in the 2-byte Temperature register (see
Table 7 on
page 17
). The most significant bit (S) indicates if the temperature is positive or negative:
for positive numbers S = 0, and
for negative numbers S = 1.
●
●
The most recently converted digital measurement can be read from the Temperature
register at any time. Since temperature conversions are performed in the background,
reading the Temperature register does not affect the operation in progress.
The temperature data is provided by the 9 MSBs (Bits 15 through 7). Bits 6 through 0 are
unused.
Table 3 on page 14
gives examples of the digital output data and corresponding
temperatures. The data is compared to the values in the T
OS
and T
HYS
registers, and then
the OS/INT is updated based on the result of the comparison and the operating mode.
The alarm fault tolerance is controlled by the FT1 and FT0 Bits in the Configuration register.
They are used to set up a fault queue. This prevents false tripping of the OS/INT pin when
the STCN75 is used in a noisy environment (see
Table 2 on page 13
).
The active state of the OS/INT
output can be changed via the Polarity Bit (POL) in the
Configuration register. The power-up default is active-low.
If the user does not wish to use the thermostat capabilities of the STCN75, the
OS/INToutput should be left floating.
Note:
If the thermostat is not used, the T
OS
and T
HYS
registers can be used for general storage of
system data.
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